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02-Builtins.html
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<html><head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<meta charset="utf-8">
<title>02-Builtins</title>
<script type="text/javascript" src="02-Builtins_files/MathJax.js" charset="utf-8"></script>
<script type="text/javascript">
// MathJax disabled, set as null to distingish from *missing* MathJax,
// where it will be undefined, and should prompt a dialog later.
window.mathjax_url = "mathjax/MathJax.js";
</script>
<link rel="stylesheet" href="02-Builtins_files/jquery-wijmo.css" type="text/css">
<link rel="stylesheet" href="02-Builtins_files/codemirror.css">
<link rel="stylesheet" href="02-Builtins_files/markdown.css">
<link rel="stylesheet" href="02-Builtins_files/rst.css">
<link rel="stylesheet" href="02-Builtins_files/ipython.css">
<link rel="stylesheet" href="02-Builtins_files/default.css">
<link rel="stylesheet" href="02-Builtins_files/prettify.css">
<link rel="stylesheet" href="02-Builtins_files/boilerplate.css" type="text/css">
<link rel="stylesheet" href="02-Builtins_files/layout.css" type="text/css">
<link rel="stylesheet" href="02-Builtins_files/base.css" type="text/css">
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<link rel="stylesheet" href="02-Builtins_files/renderedhtml.css" type="text/css">
<meta name="read_only" content="False">
<style type="text/css">#MathJax_Zoom {position: absolute; background-color: #F0F0F0; overflow: auto; display: block; z-index: 301; padding: .5em; border: 1px solid black; margin: 0; font-family: serif; font-size: 85%; font-weight: normal; font-style: normal; text-align: left; text-indent: 0; text-transform: none; line-height: normal; letter-spacing: normal; word-spacing: normal; word-wrap: normal; white-space: nowrap; float: none; box-shadow: 5px 5px 15px #AAAAAA; -webkit-box-shadow: 5px 5px 15px #AAAAAA; -moz-box-shadow: 5px 5px 15px #AAAAAA; -khtml-box-shadow: 5px 5px 15px #AAAAAA; filter: progid:DXImageTransform.Microsoft.dropshadow(OffX=2, OffY=2, Color='gray', Positive='true')}
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</style><style type="text/css">#MathJax_About {position: fixed; left: 50%; width: auto; text-align: center; border: 3px outset; padding: 1em 2em; background-color: #DDDDDD; cursor: default; font-family: message-box; font-size: 120%; font-style: normal; text-indent: 0; text-transform: none; line-height: normal; letter-spacing: normal; word-spacing: normal; word-wrap: normal; white-space: nowrap; float: none; z-index: 201; border-radius: 15px; -webkit-border-radius: 15px; -moz-border-radius: 15px; -khtml-border-radius: 15px; box-shadow: 0px 10px 20px #808080; -webkit-box-shadow: 0px 10px 20px #808080; -moz-box-shadow: 0px 10px 20px #808080; -khtml-box-shadow: 0px 10px 20px #808080; filter: progid:DXImageTransform.Microsoft.dropshadow(OffX=2, OffY=2, Color='gray', Positive='true')}
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.MathJax_MenuArrow {position: absolute; right: .5em; color: #666666}
.MathJax_MenuActive .MathJax_MenuArrow {color: white}
.MathJax_MenuCheck {position: absolute; left: .7em}
.MathJax_MenuRadioCheck {position: absolute; left: .7em}
.MathJax_MenuLabel {padding: 1px 2em 3px 1.33em; font-style: italic}
.MathJax_MenuRule {border-top: 1px solid #DDDDDD; margin: 4px 3px}
.MathJax_MenuDisabled {color: GrayText}
.MathJax_MenuActive {background-color: #606872; color: white}
</style><style type="text/css">#MathJax_Message {position: fixed; left: 1px; bottom: 2px; background-color: #E6E6E6; border: 1px solid #959595; margin: 0px; padding: 2px 8px; z-index: 102; color: black; font-size: 80%; width: auto; white-space: nowrap}
#MathJax_MSIE_Frame {position: absolute; top: 0; left: 0; width: 0px; z-index: 101; border: 0px; margin: 0px; padding: 0px}
.MathJax_Error {color: #CC0000; font-style: italic}
</style><style type="text/css">@media print { body { overflow: visible !important; } }.ui-widget-content { border: 0px; }</style><style type="text/css">#MathJax_Zoom {position: absolute; background-color: #F0F0F0; overflow: auto; display: block; z-index: 301; padding: .5em; border: 1px solid black; margin: 0; font-family: serif; font-size: 85%; font-weight: normal; font-style: normal; text-align: left; text-indent: 0; text-transform: none; line-height: normal; letter-spacing: normal; word-spacing: normal; word-wrap: normal; white-space: nowrap; float: none; box-shadow: 5px 5px 15px #AAAAAA; -webkit-box-shadow: 5px 5px 15px #AAAAAA; -moz-box-shadow: 5px 5px 15px #AAAAAA; -khtml-box-shadow: 5px 5px 15px #AAAAAA; filter: progid:DXImageTransform.Microsoft.dropshadow(OffX=2, OffY=2, Color='gray', Positive='true')}
#MathJax_ZoomOverlay {position: absolute; left: 0; top: 0; z-index: 300; display: inline-block; width: 100%; height: 100%; border: 0; padding: 0; margin: 0; background-color: white; opacity: 0; filter: alpha(opacity=0)}
</style><style type="text/css">#MathJax_About {position: fixed; left: 50%; width: auto; text-align: center; border: 3px outset; padding: 1em 2em; background-color: #DDDDDD; cursor: default; font-family: message-box; font-size: 120%; font-style: normal; text-indent: 0; text-transform: none; line-height: normal; letter-spacing: normal; word-spacing: normal; word-wrap: normal; white-space: nowrap; float: none; z-index: 201; border-radius: 15px; -webkit-border-radius: 15px; -moz-border-radius: 15px; -khtml-border-radius: 15px; box-shadow: 0px 10px 20px #808080; -webkit-box-shadow: 0px 10px 20px #808080; -moz-box-shadow: 0px 10px 20px #808080; -khtml-box-shadow: 0px 10px 20px #808080; filter: progid:DXImageTransform.Microsoft.dropshadow(OffX=2, OffY=2, Color='gray', Positive='true')}
.MathJax_Menu {position: absolute; background-color: white; color: black; width: auto; padding: 5px 0px; border: 1px solid #CCCCCC; margin: 0; cursor: default; font: menu; text-align: left; text-indent: 0; text-transform: none; line-height: normal; letter-spacing: normal; word-spacing: normal; word-wrap: normal; white-space: nowrap; float: none; z-index: 201; border-radius: 5px; -webkit-border-radius: 5px; -moz-border-radius: 5px; -khtml-border-radius: 5px; box-shadow: 0px 10px 20px #808080; -webkit-box-shadow: 0px 10px 20px #808080; -moz-box-shadow: 0px 10px 20px #808080; -khtml-box-shadow: 0px 10px 20px #808080; filter: progid:DXImageTransform.Microsoft.dropshadow(OffX=2, OffY=2, Color='gray', Positive='true')}
.MathJax_MenuItem {padding: 1px 2em; background: transparent}
.MathJax_MenuTitle {background-color: #CCCCCC; margin: -5px 0 0 0; text-align: center; font-style: italic; font-size: 80%; color: #444444; padding: 2px 0; overflow: hidden}
.MathJax_MenuArrow {position: absolute; right: .5em; color: #666666}
.MathJax_MenuActive .MathJax_MenuArrow {color: white}
.MathJax_MenuCheck {position: absolute; left: .7em}
.MathJax_MenuRadioCheck {position: absolute; left: .7em}
.MathJax_MenuLabel {padding: 1px 2em 3px 1.33em; font-style: italic}
.MathJax_MenuRule {border-top: 1px solid #DDDDDD; margin: 4px 3px}
.MathJax_MenuDisabled {color: GrayText}
.MathJax_MenuActive {background-color: #606872; color: white}
</style><style type="text/css">#MathJax_Message {position: fixed; left: 1px; bottom: 2px; background-color: #E6E6E6; border: 1px solid #959595; margin: 0px; padding: 2px 8px; z-index: 102; color: black; font-size: 80%; width: auto; white-space: nowrap}
#MathJax_MSIE_Frame {position: absolute; top: 0; left: 0; width: 0px; z-index: 101; border: 0px; margin: 0px; padding: 0px}
.MathJax_Error {color: #CC0000; font-style: italic}
</style></head><body style="overflow: auto;"><div tabindex="2" class="cell text_cell border-box-sizing ui-widget-content ui-corner-all"><div style="display: none;" class="text_cell_input"><div class="CodeMirror"><div style="overflow: hidden; position: relative; width: 1px; height: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-default"><div style="position: relative; height: 3px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre>x</pre></div><div style="position: relative"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative" draggable="true"><pre class="CodeMirror-cursor"> </pre><div></div></div></div></div></div></div></div></div><div tabindex="-1" class="text_cell_render rendered_html"><h1>Useful Builtins</h1>
<h2><code>zip</code></h2></div></div><div tabindex="2" class="cell border-box-sizing code_cell vbox"><div class="input hbox"><div class="prompt input_prompt">In [1]:</div><div class="input_area box-flex1"><div class="CodeMirror CodeMirror-focused"><div style="overflow: hidden; position: relative; width: 1px; height: 0px; top: 0px; left: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-ipython"><div style="position: relative; height: 30px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre><span>zip([1,2,3], ['a', 'b', 'c'])</span></pre></div><div style="position: relative; top: 0px;"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative;" draggable="true"><pre style="top: 0px; left: 0px; visibility: hidden;" class="CodeMirror-cursor"> </pre><div style=""><pre><span class="cm-variable">zip</span><span class="cm-null">([</span><span class="cm-number">1</span><span class="cm-null">,</span><span class="cm-number">2</span><span class="cm-null">,</span><span class="cm-number">3</span><span class="cm-null">], [</span><span class="cm-string">'a'</span><span class="cm-null">, </span><span class="cm-string">'b'</span><span class="cm-null">, </span><span class="cm-string">'c'</span><span class="cm-null">])</span></pre></div></div></div></div></div></div></div></div></div><div style="display: -moz-box;" class="output vbox"><div class="hbox output_area"><div class="prompt output_prompt">Out[1]:</div><div class="box_flex1 output_subarea output_text"><pre>[(1, 'a'), (2, 'b'), (3, 'c')]</pre></div></div></div></div><div tabindex="2" class="cell border-box-sizing code_cell vbox"><div class="input hbox"><div class="prompt input_prompt">In [3]:</div><div class="input_area box-flex1"><div class="CodeMirror CodeMirror-focused"><div style="overflow: hidden; position: relative; width: 1px; height: 0px; top: 0px; left: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-ipython"><div style="position: relative; height: 65px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre><span> [ 7, 8, 9 ] ]</span></pre></div><div style="position: relative; top: 0px;"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative;" draggable="true"><pre style="top: 0px; left: 0px; visibility: hidden;" class="CodeMirror-cursor"> </pre><div style=""><pre><span class="cm-variable">x</span><span class="cm-null"> = [[ </span><span class="cm-number">1</span><span class="cm-null">, </span><span class="cm-number">2</span><span class="cm-null">, </span><span class="cm-number">3</span><span class="cm-null"> ],</span></pre><pre><span class="cm-null"> [ </span><span class="cm-number">4</span><span class="cm-null">, </span><span class="cm-number">5</span><span class="cm-null">, </span><span class="cm-number">6</span><span class="cm-null"> ],</span></pre><pre><span class="cm-null"> [ </span><span class="cm-number">7</span><span class="cm-null">, </span><span class="cm-number">8</span><span class="cm-null">, </span><span class="cm-number">9</span><span class="cm-null"> ] ]</span></pre></div></div></div></div></div></div></div></div></div><div style="display: none;" class="output vbox"></div></div><div tabindex="2" class="cell border-box-sizing code_cell vbox"><div class="input hbox"><div class="prompt input_prompt">In [5]:</div><div class="input_area box-flex1"><div class="CodeMirror CodeMirror-focused"><div style="overflow: hidden; position: relative; width: 1px; height: 0px; top: 0px; left: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-ipython"><div style="position: relative; height: 30px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre><span>zip(x[0], x[1], x[2])</span></pre></div><div style="position: relative; top: 0px;"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative;" draggable="true"><pre style="top: 0px; left: 0px; visibility: hidden;" class="CodeMirror-cursor"> </pre><div style=""><pre><span class="cm-variable">zip</span><span class="cm-null">(</span><span class="cm-variable">x</span><span class="cm-null">[</span><span class="cm-number">0</span><span class="cm-null">], </span><span class="cm-variable">x</span><span class="cm-null">[</span><span class="cm-number">1</span><span class="cm-null">], </span><span class="cm-variable">x</span><span class="cm-null">[</span><span class="cm-number">2</span><span class="cm-null">])</span></pre></div></div></div></div></div></div></div></div></div><div style="display: -moz-box;" class="output vbox"><div class="hbox output_area"><div class="prompt output_prompt">Out[5]:</div><div class="box_flex1 output_subarea output_text"><pre>[(1, 4, 7), (2, 5, 8), (3, 6, 9)]</pre></div></div></div></div><div tabindex="2" class="cell border-box-sizing code_cell vbox"><div class="input hbox"><div class="prompt input_prompt">In [6]:</div><div class="input_area box-flex1"><div class="CodeMirror CodeMirror-focused"><div style="overflow: hidden; position: relative; width: 1px; height: 0px; top: 0px; left: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-ipython"><div style="position: relative; height: 30px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre><span>zip(*x)</span></pre></div><div style="position: relative; top: 0px;"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative;" draggable="true"><pre style="top: 0px; left: 0px; visibility: hidden;" class="CodeMirror-cursor"> </pre><div style=""><pre><span class="cm-variable">zip</span><span class="cm-null">(</span><span class="cm-operator">*</span><span class="cm-variable">x</span><span class="cm-null">)</span></pre></div></div></div></div></div></div></div></div></div><div style="display: -moz-box;" class="output vbox"><div class="hbox output_area"><div class="prompt output_prompt">Out[6]:</div><div class="box_flex1 output_subarea output_text"><pre>[(1, 4, 7), (2, 5, 8), (3, 6, 9)]</pre></div></div></div></div><div tabindex="2" class="cell text_cell border-box-sizing"><div style="display: none;" class="text_cell_input"><div class="CodeMirror"><div style="overflow: hidden; position: relative; width: 1px; height: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-default"><div style="position: relative; height: 1px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre>x</pre></div><div style="position: relative"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative" draggable="true"><pre class="CodeMirror-cursor"> </pre><div></div></div></div></div></div></div></div></div><div tabindex="-1" class="text_cell_render rendered_html"><h2><code>enumerate</code></h2></div></div><div tabindex="2" class="cell border-box-sizing code_cell vbox"><div class="input hbox"><div class="prompt input_prompt">In [7]:</div><div class="input_area box-flex1"><div class="CodeMirror CodeMirror-focused"><div style="overflow: hidden; position: relative; width: 1px; height: 0px; top: 0px; left: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-ipython"><div style="position: relative; height: 30px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre><span>lst = [ 'foo', 'bar', 'baz' ]</span></pre></div><div style="position: relative; top: 0px;"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative;" draggable="true"><pre style="top: 0px; left: 0px; visibility: hidden;" class="CodeMirror-cursor"> </pre><div style=""><pre><span class="cm-variable">lst</span><span class="cm-null"> = [ </span><span class="cm-string">'foo'</span><span class="cm-null">, </span><span class="cm-string">'bar'</span><span class="cm-null">, </span><span class="cm-string">'baz'</span><span class="cm-null"> ]</span></pre></div></div></div></div></div></div></div></div></div><div style="display: none;" class="output vbox"></div></div><div tabindex="2" class="cell border-box-sizing code_cell vbox"><div class="input hbox"><div class="prompt input_prompt">In [8]:</div><div class="input_area box-flex1"><div class="CodeMirror CodeMirror-focused"><div style="overflow: hidden; position: relative; width: 1px; height: 0px; top: 0px; left: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-ipython"><div style="position: relative; height: 65px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre><span>for x in range(len(lst)):</span></pre></div><div style="position: relative; top: 0px;"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative;" draggable="true"><pre style="top: 0px; left: 0px; visibility: hidden;" class="CodeMirror-cursor"> </pre><div style=""><pre><span class="cm-comment"># Don't do this:</span></pre><pre><span class="cm-keyword">for</span><span class="cm-null"> </span><span class="cm-variable">x</span><span class="cm-null"> </span><span class="cm-operator">in</span><span class="cm-null"> </span><span class="cm-variable">range</span><span class="cm-null">(</span><span class="cm-variable">len</span><span class="cm-null">(</span><span class="cm-variable">lst</span><span class="cm-null">)):</span></pre><pre><span class="cm-null"> </span><span class="cm-keyword">print</span><span class="cm-null"> </span><span class="cm-variable">x</span><span class="cm-null">, </span><span class="cm-variable">lst</span><span class="cm-null">[</span><span class="cm-variable">x</span><span class="cm-null">]</span></pre></div></div></div></div></div></div></div></div></div><div style="display: -moz-box;" class="output vbox"><div class="hbox output_area"><div class="prompt"></div><div class="box_flex1 output_subarea output_text output_stream output_stdout"><pre>0 foo
1 bar
2 baz</pre></div></div></div></div><div tabindex="2" class="cell border-box-sizing code_cell vbox"><div class="input hbox"><div class="prompt input_prompt">In [11]:</div><div class="input_area box-flex1"><div class="CodeMirror CodeMirror-focused"><div style="overflow: hidden; position: relative; width: 1px; height: 0px; top: 0px; left: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-ipython"><div style="position: relative; height: 65px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre><span>for index, x in enumerate(lst):</span></pre></div><div style="position: relative; top: 0px;"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative;" draggable="true"><pre style="top: 0px; left: 0px; visibility: hidden;" class="CodeMirror-cursor"> </pre><div style=""><pre><span class="cm-comment"># Do this instead:</span></pre><pre><span class="cm-keyword">for</span><span class="cm-null"> </span><span class="cm-variable">index</span><span class="cm-null">, </span><span class="cm-variable">x</span><span class="cm-null"> </span><span class="cm-operator">in</span><span class="cm-null"> </span><span class="cm-builtin">enumerate</span><span class="cm-null">(</span><span class="cm-variable">lst</span><span class="cm-null">):</span></pre><pre><span class="cm-null"> </span><span class="cm-keyword">print</span><span class="cm-null"> </span><span class="cm-variable">index</span><span class="cm-null">, </span><span class="cm-variable">x</span></pre></div></div></div></div></div></div></div></div></div><div style="display: -moz-box;" class="output vbox"><div class="hbox output_area"><div class="prompt"></div><div class="box_flex1 output_subarea output_text output_stream output_stdout"><pre>0 foo
1 bar
2 baz</pre></div></div></div></div><div tabindex="2" class="cell text_cell border-box-sizing"><div style="display: none;" class="text_cell_input"><div class="CodeMirror"><div style="overflow: hidden; position: relative; width: 1px; height: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-default"><div style="position: relative; height: 1px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre>x</pre></div><div style="position: relative"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative" draggable="true"><pre class="CodeMirror-cursor"> </pre><div></div></div></div></div></div></div></div></div><div tabindex="-1" class="text_cell_render rendered_html"><h2><code>eval</code></h2></div></div><div tabindex="2" class="cell border-box-sizing code_cell vbox"><div class="input hbox"><div class="prompt input_prompt">In [18]:</div><div class="input_area box-flex1"><div class="CodeMirror CodeMirror-focused"><div style="overflow: hidden; position: relative; width: 1px; height: 0px; top: 0px; left: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-ipython"><div style="position: relative; height: 30px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre><span>eval('5+5')</span></pre></div><div style="position: relative; top: 0px;"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative;" draggable="true"><pre style="top: 0px; left: 0px; visibility: hidden;" class="CodeMirror-cursor"> </pre><div style=""><pre><span class="cm-variable">eval</span><span class="cm-null">(</span><span class="cm-string">'5+5'</span><span class="cm-null">)</span></pre></div></div></div></div></div></div></div></div></div><div style="display: -moz-box;" class="output vbox"><div class="hbox output_area"><div class="prompt output_prompt">Out[18]:</div><div class="box_flex1 output_subarea output_text"><pre>10</pre></div></div></div></div><div tabindex="2" class="cell border-box-sizing code_cell vbox"><div class="input hbox"><div class="prompt input_prompt">In [19]:</div><div class="input_area box-flex1"><div class="CodeMirror CodeMirror-focused"><div style="overflow: hidden; position: relative; width: 1px; height: 0px; top: 0px; left: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-ipython"><div style="position: relative; height: 65px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre><span>r_x = repr(x)</span></pre></div><div style="position: relative; top: 0px;"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative;" draggable="true"><pre style="top: 0px; left: 0px; visibility: hidden;" class="CodeMirror-cursor"> </pre><div style=""><pre><span class="cm-variable">x</span><span class="cm-null"> = [</span><span class="cm-number">1</span><span class="cm-null">,</span><span class="cm-number">2</span><span class="cm-null">,</span><span class="cm-number">3</span><span class="cm-null">]</span></pre><pre><span class="cm-variable">r_x</span><span class="cm-null"> = </span><span class="cm-variable">repr</span><span class="cm-null">(</span><span class="cm-variable">x</span><span class="cm-null">)</span></pre><pre><span class="cm-variable">eval</span><span class="cm-null">(</span><span class="cm-variable">r_x</span><span class="cm-null">)</span></pre></div></div></div></div></div></div></div></div></div><div style="display: -moz-box;" class="output vbox"><div class="hbox output_area"><div class="prompt output_prompt">Out[19]:</div><div class="box_flex1 output_subarea output_text"><pre>[1, 2, 3]</pre></div></div></div></div><div tabindex="2" class="cell text_cell border-box-sizing"><div style="display: none;" class="text_cell_input"><div class="CodeMirror"><div style="overflow: hidden; position: relative; width: 1px; height: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-default"><div style="position: relative; height: 1px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre>x</pre></div><div style="position: relative"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative" draggable="true"><pre class="CodeMirror-cursor"> </pre><div></div></div></div></div></div></div></div></div><div tabindex="-1" class="text_cell_render rendered_html"><h2><code>dir</code></h2></div></div><div tabindex="2" class="cell border-box-sizing code_cell vbox"><div class="input hbox"><div class="prompt input_prompt">In [23]:</div><div class="input_area box-flex1"><div class="CodeMirror CodeMirror-focused"><div style="overflow: hidden; position: relative; width: 1px; height: 0px; top: 0px; left: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-ipython"><div style="position: relative; height: 47px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre><span>dir(x)</span></pre></div><div style="position: relative; top: 0px;"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative;" draggable="true"><pre style="top: 0px; left: 0px; visibility: hidden;" class="CodeMirror-cursor"> </pre><div style=""><pre><span class="cm-variable">x</span><span class="cm-null"> = </span><span class="cm-number">5</span></pre><pre><span class="cm-variable">dir</span><span class="cm-null">(</span><span class="cm-variable">x</span><span class="cm-null">)</span></pre></div></div></div></div></div></div></div></div></div><div style="display: -moz-box;" class="output vbox"><div class="hbox output_area"><div class="prompt output_prompt">Out[23]:</div><div class="box_flex1 output_subarea output_text"><pre>['__abs__',
'__add__',
'__and__',
'__class__',
'__cmp__',
'__coerce__',
'__delattr__',
'__div__',
'__divmod__',
'__doc__',
'__float__',
'__floordiv__',
'__format__',
'__getattribute__',
'__getnewargs__',
'__hash__',
'__hex__',
'__index__',
'__init__',
'__int__',
'__invert__',
'__long__',
'__lshift__',
'__mod__',
'__mul__',
'__neg__',
'__new__',
'__nonzero__',
'__oct__',
'__or__',
'__pos__',
'__pow__',
'__radd__',
'__rand__',
'__rdiv__',
'__rdivmod__',
'__reduce__',
'__reduce_ex__',
'__repr__',
'__rfloordiv__',
'__rlshift__',
'__rmod__',
'__rmul__',
'__ror__',
'__rpow__',
'__rrshift__',
'__rshift__',
'__rsub__',
'__rtruediv__',
'__rxor__',
'__setattr__',
'__sizeof__',
'__str__',
'__sub__',
'__subclasshook__',
'__truediv__',
'__trunc__',
'__xor__',
'bit_length',
'conjugate',
'denominator',
'imag',
'numerator',
'real']</pre></div></div></div></div><div tabindex="2" class="cell border-box-sizing code_cell vbox"><div class="input hbox"><div class="prompt input_prompt">In [24]:</div><div class="input_area box-flex1"><div class="CodeMirror CodeMirror-focused"><div style="overflow: hidden; position: relative; width: 1px; height: 0px; top: 0px; left: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-ipython"><div style="position: relative; height: 30px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre><span>x.bit_length()</span></pre></div><div style="position: relative; top: 0px;"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative;" draggable="true"><pre style="top: 0px; left: 0px; visibility: hidden;" class="CodeMirror-cursor"> </pre><div style=""><pre><span class="cm-variable">x.bit_length</span><span class="cm-null">()</span></pre></div></div></div></div></div></div></div></div></div><div style="display: -moz-box;" class="output vbox"><div class="hbox output_area"><div class="prompt output_prompt">Out[24]:</div><div class="box_flex1 output_subarea output_text"><pre>3</pre></div></div></div></div><div tabindex="2" class="cell border-box-sizing code_cell vbox"><div class="input hbox"><div class="prompt input_prompt">In [35]:</div><div class="input_area box-flex1"><div class="CodeMirror CodeMirror-focused"><div style="overflow: hidden; position: relative; width: 1px; height: 0px; top: 0px; left: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-ipython"><div style="position: relative; height: 47px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre><span>x = 'Foo'</span></pre></div><div style="position: relative; top: 0px;"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative;" draggable="true"><pre style="top: 0px; left: 0px; visibility: hidden;" class="CodeMirror-cursor"> </pre><div style=""><pre><span class="cm-variable">x</span><span class="cm-null"> = </span><span class="cm-string">'Foo'</span></pre><pre><span class="cm-variable">dir</span><span class="cm-null">(</span><span class="cm-variable">x</span><span class="cm-null">)</span></pre></div></div></div></div></div></div></div></div></div><div style="display: -moz-box;" class="output vbox"><div class="hbox output_area"><div class="prompt output_prompt">Out[35]:</div><div class="box_flex1 output_subarea output_text"><pre>['__add__',
'__class__',
'__contains__',
'__delattr__',
'__doc__',
'__eq__',
'__format__',
'__ge__',
'__getattribute__',
'__getitem__',
'__getnewargs__',
'__getslice__',
'__gt__',
'__hash__',
'__init__',
'__le__',
'__len__',
'__lt__',
'__mod__',
'__mul__',
'__ne__',
'__new__',
'__reduce__',
'__reduce_ex__',
'__repr__',
'__rmod__',
'__rmul__',
'__setattr__',
'__sizeof__',
'__str__',
'__subclasshook__',
'_formatter_field_name_split',
'_formatter_parser',
'capitalize',
'center',
'count',
'decode',
'encode',
'endswith',
'expandtabs',
'find',
'format',
'index',
'isalnum',
'isalpha',
'isdigit',
'islower',
'isspace',
'istitle',
'isupper',
'join',
'ljust',
'lower',
'lstrip',
'partition',
'replace',
'rfind',
'rindex',
'rjust',
'rpartition',
'rsplit',
'rstrip',
'split',
'splitlines',
'startswith',
'strip',
'swapcase',
'title',
'translate',
'upper',
'zfill']</pre></div></div></div></div><div tabindex="2" class="cell border-box-sizing code_cell vbox"><div class="input hbox"><div class="prompt input_prompt">In [37]:</div><div class="input_area box-flex1"><div class="CodeMirror CodeMirror-focused"><div style="overflow: hidden; position: relative; width: 1px; height: 0px; top: 0px; left: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-ipython"><div style="position: relative; height: 30px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre><span>help(x.partition)</span></pre></div><div style="position: relative; top: 0px;"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative;" draggable="true"><pre style="top: 0px; left: 0px; visibility: hidden;" class="CodeMirror-cursor"> </pre><div style=""><pre><span class="cm-variable">help</span><span class="cm-null">(</span><span class="cm-variable">x.partition</span><span class="cm-null">)</span></pre></div></div></div></div></div></div></div></div></div><div style="display: -moz-box;" class="output vbox"><div class="hbox output_area"><div class="prompt"></div><div class="box_flex1 output_subarea output_text output_stream output_stdout"><pre>Help on built-in function partition:
partition(...)
S.partition(sep) -> (head, sep, tail)
Search for the separator sep in S, and return the part before it,
the separator itself, and the part after it. If the separator is not
found, return S and two empty strings.</pre></div></div></div></div><div tabindex="2" class="cell text_cell border-box-sizing"><div style="display: none;" class="text_cell_input"><div class="CodeMirror"><div style="overflow: hidden; position: relative; width: 1px; height: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-default"><div style="position: relative; height: 1px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre>x</pre></div><div style="position: relative"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative" draggable="true"><pre class="CodeMirror-cursor"> </pre><div></div></div></div></div></div></div></div></div><div tabindex="-1" class="text_cell_render rendered_html"><h2><code>ord</code> and <code>chr</code></h2></div></div><div tabindex="2" class="cell border-box-sizing code_cell vbox"><div class="input hbox"><div class="prompt input_prompt">In [38]:</div><div class="input_area box-flex1"><div class="CodeMirror CodeMirror-focused"><div style="overflow: hidden; position: relative; width: 1px; height: 0px; top: 0px; left: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-ipython"><div style="position: relative; height: 30px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre><span>ord('a')</span></pre></div><div style="position: relative; top: 0px;"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative;" draggable="true"><pre style="top: 0px; left: 0px; visibility: hidden;" class="CodeMirror-cursor"> </pre><div style=""><pre><span class="cm-variable">ord</span><span class="cm-null">(</span><span class="cm-string">'a'</span><span class="cm-null">)</span></pre></div></div></div></div></div></div></div></div></div><div style="display: -moz-box;" class="output vbox"><div class="hbox output_area"><div class="prompt output_prompt">Out[38]:</div><div class="box_flex1 output_subarea output_text"><pre>97</pre></div></div></div></div><div tabindex="2" class="cell border-box-sizing code_cell vbox"><div class="input hbox"><div class="prompt input_prompt">In [39]:</div><div class="input_area box-flex1"><div class="CodeMirror CodeMirror-focused"><div style="overflow: hidden; position: relative; width: 1px; height: 0px; top: 0px; left: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-ipython"><div style="position: relative; height: 30px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre><span>chr(97)</span></pre></div><div style="position: relative; top: 0px;"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative;" draggable="true"><pre style="top: 0px; left: 0px; visibility: hidden;" class="CodeMirror-cursor"> </pre><div style=""><pre><span class="cm-variable">chr</span><span class="cm-null">(</span><span class="cm-number">97</span><span class="cm-null">)</span></pre></div></div></div></div></div></div></div></div></div><div style="display: -moz-box;" class="output vbox"><div class="hbox output_area"><div class="prompt output_prompt">Out[39]:</div><div class="box_flex1 output_subarea output_text"><pre>'a'</pre></div></div></div></div><div tabindex="2" class="cell text_cell border-box-sizing"><div style="display: none;" class="text_cell_input"><div class="CodeMirror"><div style="overflow: hidden; position: relative; width: 1px; height: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-default"><div style="position: relative; height: 1px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre>x</pre></div><div style="position: relative"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative" draggable="true"><pre class="CodeMirror-cursor"> </pre><div></div></div></div></div></div></div></div></div><div tabindex="-1" class="text_cell_render rendered_html"><h2><code>map</code> and <code>filter</code></h2></div></div><div tabindex="2" class="cell border-box-sizing code_cell vbox"><div class="input hbox"><div class="prompt input_prompt">In [41]:</div><div class="input_area box-flex1"><div class="CodeMirror CodeMirror-focused"><div style="overflow: hidden; position: relative; width: 1px; height: 0px; top: 0px; left: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-ipython"><div style="position: relative; height: 47px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre><span>x = map(ord, 'Foo')</span></pre></div><div style="position: relative; top: 0px;"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative;" draggable="true"><pre style="top: 0px; left: 0px; visibility: hidden;" class="CodeMirror-cursor"> </pre><div style=""><pre><span class="cm-variable">x</span><span class="cm-null"> = </span><span class="cm-variable">map</span><span class="cm-null">(</span><span class="cm-variable">ord</span><span class="cm-null">, </span><span class="cm-string">'Foo'</span><span class="cm-null">)</span></pre><pre><span class="cm-variable">x</span></pre></div></div></div></div></div></div></div></div></div><div style="display: -moz-box;" class="output vbox"><div class="hbox output_area"><div class="prompt output_prompt">Out[41]:</div><div class="box_flex1 output_subarea output_text"><pre>[70, 111, 111]</pre></div></div></div></div><div tabindex="2" class="cell border-box-sizing code_cell vbox"><div class="input hbox"><div class="prompt input_prompt">In [42]:</div><div class="input_area box-flex1"><div class="CodeMirror CodeMirror-focused"><div style="overflow: hidden; position: relative; width: 1px; height: 0px; top: 0px; left: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-ipython"><div style="position: relative; height: 30px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre><span>map(chr, x)</span></pre></div><div style="position: relative; top: 0px;"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative;" draggable="true"><pre style="top: 0px; left: 0px; visibility: hidden;" class="CodeMirror-cursor"> </pre><div style=""><pre><span class="cm-variable">map</span><span class="cm-null">(</span><span class="cm-variable">chr</span><span class="cm-null">, </span><span class="cm-variable">x</span><span class="cm-null">)</span></pre></div></div></div></div></div></div></div></div></div><div style="display: -moz-box;" class="output vbox"><div class="hbox output_area"><div class="prompt output_prompt">Out[42]:</div><div class="box_flex1 output_subarea output_text"><pre>['F', 'o', 'o']</pre></div></div></div></div><div tabindex="2" class="cell border-box-sizing code_cell vbox"><div class="input hbox"><div class="prompt input_prompt">In [43]:</div><div class="input_area box-flex1"><div class="CodeMirror CodeMirror-focused"><div style="overflow: hidden; position: relative; width: 1px; height: 0px; top: 0px; left: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-ipython"><div style="position: relative; height: 65px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre><span>filter(is_even, range(10))</span></pre></div><div style="position: relative; top: 0px;"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative;" draggable="true"><pre style="top: 0px; left: 0px; visibility: hidden;" class="CodeMirror-cursor"> </pre><div style=""><pre><span class="cm-keyword">def</span><span class="cm-null"> </span><span class="cm-variable">is_even</span><span class="cm-null">(</span><span class="cm-variable">num</span><span class="cm-null">):</span></pre><pre><span class="cm-null"> </span><span class="cm-keyword">return</span><span class="cm-null"> </span><span class="cm-variable">num</span><span class="cm-null"> </span><span class="cm-operator">%</span><span class="cm-null"> </span><span class="cm-number">2</span><span class="cm-null"> </span><span class="cm-operator">==</span><span class="cm-null"> </span><span class="cm-number">0</span></pre><pre><span class="cm-variable">filter</span><span class="cm-null">(</span><span class="cm-variable">is_even</span><span class="cm-null">, </span><span class="cm-variable">range</span><span class="cm-null">(</span><span class="cm-number">10</span><span class="cm-null">))</span></pre></div></div></div></div></div></div></div></div></div><div style="display: -moz-box;" class="output vbox"><div class="hbox output_area"><div class="prompt output_prompt">Out[43]:</div><div class="box_flex1 output_subarea output_text"><pre>[0, 2, 4, 6, 8]</pre></div></div></div></div><div tabindex="2" class="cell text_cell border-box-sizing"><div style="display: none;" class="text_cell_input"><div class="CodeMirror"><div style="overflow: hidden; position: relative; width: 1px; height: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-default"><div style="position: relative; height: 1px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre>x</pre></div><div style="position: relative"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative" draggable="true"><pre class="CodeMirror-cursor"> </pre><div></div></div></div></div></div></div></div></div><div tabindex="-1" class="text_cell_render rendered_html"><h2><code>sum</code>, <code>max</code>, <code>min</code>, and <code>len</code></h2></div></div><div tabindex="2" class="cell border-box-sizing code_cell vbox"><div class="input hbox"><div class="prompt input_prompt">In [44]:</div><div class="input_area box-flex1"><div class="CodeMirror CodeMirror-focused"><div style="overflow: hidden; position: relative; width: 1px; height: 0px; top: 0px; left: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-ipython"><div style="position: relative; height: 30px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre><span>sum(range(10))</span></pre></div><div style="position: relative; top: 0px;"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative;" draggable="true"><pre style="top: 0px; left: 0px; visibility: hidden;" class="CodeMirror-cursor"> </pre><div style=""><pre><span class="cm-variable">sum</span><span class="cm-null">(</span><span class="cm-variable">range</span><span class="cm-null">(</span><span class="cm-number">10</span><span class="cm-null">))</span></pre></div></div></div></div></div></div></div></div></div><div style="display: -moz-box;" class="output vbox"><div class="hbox output_area"><div class="prompt output_prompt">Out[44]:</div><div class="box_flex1 output_subarea output_text"><pre>45</pre></div></div></div></div><div tabindex="2" class="cell border-box-sizing code_cell vbox"><div class="input hbox"><div class="prompt input_prompt">In [45]:</div><div class="input_area box-flex1"><div class="CodeMirror CodeMirror-focused"><div style="overflow: hidden; position: relative; width: 1px; height: 0px; top: 0px; left: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-ipython"><div style="position: relative; height: 30px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre><span>max(range(10))</span></pre></div><div style="position: relative; top: 0px;"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative;" draggable="true"><pre style="top: 0px; left: 0px; visibility: hidden;" class="CodeMirror-cursor"> </pre><div style=""><pre><span class="cm-variable">max</span><span class="cm-null">(</span><span class="cm-variable">range</span><span class="cm-null">(</span><span class="cm-number">10</span><span class="cm-null">))</span></pre></div></div></div></div></div></div></div></div></div><div style="display: -moz-box;" class="output vbox"><div class="hbox output_area"><div class="prompt output_prompt">Out[45]:</div><div class="box_flex1 output_subarea output_text"><pre>9</pre></div></div></div></div><div tabindex="2" class="cell border-box-sizing code_cell vbox"><div class="input hbox"><div class="prompt input_prompt">In [46]:</div><div class="input_area box-flex1"><div class="CodeMirror CodeMirror-focused"><div style="overflow: hidden; position: relative; width: 1px; height: 0px; top: 0px; left: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-ipython"><div style="position: relative; height: 30px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre><span>min(range(10))</span></pre></div><div style="position: relative; top: 0px;"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative;" draggable="true"><pre style="top: 0px; left: 0px; visibility: hidden;" class="CodeMirror-cursor"> </pre><div style=""><pre><span class="cm-variable">min</span><span class="cm-null">(</span><span class="cm-variable">range</span><span class="cm-null">(</span><span class="cm-number">10</span><span class="cm-null">))</span></pre></div></div></div></div></div></div></div></div></div><div style="display: -moz-box;" class="output vbox"><div class="hbox output_area"><div class="prompt output_prompt">Out[46]:</div><div class="box_flex1 output_subarea output_text"><pre>0</pre></div></div></div></div><div tabindex="2" class="cell border-box-sizing code_cell vbox"><div class="input hbox"><div class="prompt input_prompt">In [47]:</div><div class="input_area box-flex1"><div class="CodeMirror CodeMirror-focused"><div style="overflow: hidden; position: relative; width: 1px; height: 0px; top: 0px; left: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-ipython"><div style="position: relative; height: 30px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre><span>len(range(10))</span></pre></div><div style="position: relative; top: 0px;"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative;" draggable="true"><pre style="top: 0px; left: 0px; visibility: hidden;" class="CodeMirror-cursor"> </pre><div style=""><pre><span class="cm-variable">len</span><span class="cm-null">(</span><span class="cm-variable">range</span><span class="cm-null">(</span><span class="cm-number">10</span><span class="cm-null">))</span></pre></div></div></div></div></div></div></div></div></div><div style="display: -moz-box;" class="output vbox"><div class="hbox output_area"><div class="prompt output_prompt">Out[47]:</div><div class="box_flex1 output_subarea output_text"><pre>10</pre></div></div></div></div><div tabindex="2" class="cell text_cell border-box-sizing"><div style="display: none;" class="text_cell_input"><div class="CodeMirror"><div style="overflow: hidden; position: relative; width: 1px; height: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-default"><div style="position: relative; height: 1px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre>x</pre></div><div style="position: relative"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative" draggable="true"><pre class="CodeMirror-cursor"> </pre><div></div></div></div></div></div></div></div></div><div tabindex="-1" class="text_cell_render rendered_html"><h2><code>repr</code></h2></div></div><div tabindex="2" class="cell border-box-sizing code_cell vbox"><div class="input hbox"><div class="prompt input_prompt">In [48]:</div><div class="input_area box-flex1"><div class="CodeMirror CodeMirror-focused"><div style="overflow: hidden; position: relative; width: 1px; height: 0px; top: 0px; left: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-ipython"><div style="position: relative; height: 30px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre><span>repr(1)</span></pre></div><div style="position: relative; top: 0px;"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative;" draggable="true"><pre style="top: 0px; left: 0px; visibility: hidden;" class="CodeMirror-cursor"> </pre><div style=""><pre><span class="cm-variable">repr</span><span class="cm-null">(</span><span class="cm-number">1</span><span class="cm-null">)</span></pre></div></div></div></div></div></div></div></div></div><div style="display: -moz-box;" class="output vbox"><div class="hbox output_area"><div class="prompt output_prompt">Out[48]:</div><div class="box_flex1 output_subarea output_text"><pre>'1'</pre></div></div></div></div><div tabindex="2" class="cell border-box-sizing code_cell vbox"><div class="input hbox"><div class="prompt input_prompt">In [49]:</div><div class="input_area box-flex1"><div class="CodeMirror CodeMirror-focused"><div style="overflow: hidden; position: relative; width: 1px; height: 0px; top: 0px; left: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-ipython"><div style="position: relative; height: 30px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre><span>repr('foo')</span></pre></div><div style="position: relative; top: 0px;"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative;" draggable="true"><pre style="top: 0px; left: 0px; visibility: hidden;" class="CodeMirror-cursor"> </pre><div style=""><pre><span class="cm-variable">repr</span><span class="cm-null">(</span><span class="cm-string">'foo'</span><span class="cm-null">)</span></pre></div></div></div></div></div></div></div></div></div><div style="display: -moz-box;" class="output vbox"><div class="hbox output_area"><div class="prompt output_prompt">Out[49]:</div><div class="box_flex1 output_subarea output_text"><pre>"'foo'"</pre></div></div></div></div><div tabindex="2" class="cell border-box-sizing code_cell vbox"><div class="input hbox"><div class="prompt input_prompt">In [50]:</div><div class="input_area box-flex1"><div class="CodeMirror CodeMirror-focused"><div style="overflow: hidden; position: relative; width: 1px; height: 0px; top: 0px; left: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-ipython"><div style="position: relative; height: 30px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre><span>repr([1,2,4])</span></pre></div><div style="position: relative; top: 0px;"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative;" draggable="true"><pre style="top: 0px; left: 0px; visibility: hidden;" class="CodeMirror-cursor"> </pre><div style=""><pre><span class="cm-variable">repr</span><span class="cm-null">([</span><span class="cm-number">1</span><span class="cm-null">,</span><span class="cm-number">2</span><span class="cm-null">,</span><span class="cm-number">4</span><span class="cm-null">])</span></pre></div></div></div></div></div></div></div></div></div><div style="display: -moz-box;" class="output vbox"><div class="hbox output_area"><div class="prompt output_prompt">Out[50]:</div><div class="box_flex1 output_subarea output_text"><pre>'[1, 2, 4]'</pre></div></div></div></div><div tabindex="2" class="cell text_cell border-box-sizing"><div style="display: none;" class="text_cell_input"><div class="CodeMirror"><div style="overflow: hidden; position: relative; width: 1px; height: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-default"><div style="position: relative; height: 1px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre>x</pre></div><div style="position: relative"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative" draggable="true"><pre class="CodeMirror-cursor"> </pre><div></div></div></div></div></div></div></div></div><div tabindex="-1" class="text_cell_render rendered_html"><h2>Basic types</h2></div></div><div tabindex="2" class="cell border-box-sizing code_cell vbox"><div class="input hbox"><div class="prompt input_prompt">In [51]:</div><div class="input_area box-flex1"><div class="CodeMirror CodeMirror-focused"><div style="overflow: hidden; position: relative; width: 1px; height: 0px; top: 0px; left: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-ipython"><div style="position: relative; height: 30px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre><span>int('5')</span></pre></div><div style="position: relative; top: 0px;"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative;" draggable="true"><pre style="top: 0px; left: 0px; visibility: hidden;" class="CodeMirror-cursor"> </pre><div style=""><pre><span class="cm-builtin">int</span><span class="cm-null">(</span><span class="cm-string">'5'</span><span class="cm-null">)</span></pre></div></div></div></div></div></div></div></div></div><div style="display: -moz-box;" class="output vbox"><div class="hbox output_area"><div class="prompt output_prompt">Out[51]:</div><div class="box_flex1 output_subarea output_text"><pre>5</pre></div></div></div></div><div tabindex="2" class="cell border-box-sizing code_cell vbox"><div class="input hbox"><div class="prompt input_prompt">In [52]:</div><div class="input_area box-flex1"><div class="CodeMirror CodeMirror-focused"><div style="overflow: hidden; position: relative; width: 1px; height: 0px; top: 0px; left: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-ipython"><div style="position: relative; height: 30px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre><span>int('ff', base=16)</span></pre></div><div style="position: relative; top: 0px;"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative;" draggable="true"><pre style="top: 0px; left: 0px; visibility: hidden;" class="CodeMirror-cursor"> </pre><div style=""><pre><span class="cm-builtin">int</span><span class="cm-null">(</span><span class="cm-string">'ff'</span><span class="cm-null">, </span><span class="cm-variable">base</span><span class="cm-null">=</span><span class="cm-number">16</span><span class="cm-null">)</span></pre></div></div></div></div></div></div></div></div></div><div style="display: -moz-box;" class="output vbox"><div class="hbox output_area"><div class="prompt output_prompt">Out[52]:</div><div class="box_flex1 output_subarea output_text"><pre>255</pre></div></div></div></div><div tabindex="2" class="cell border-box-sizing code_cell vbox"><div class="input hbox"><div class="prompt input_prompt">In [53]:</div><div class="input_area box-flex1"><div class="CodeMirror CodeMirror-focused"><div style="overflow: hidden; position: relative; width: 1px; height: 0px; top: 0px; left: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-ipython"><div style="position: relative; height: 30px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre><span>float('5')</span></pre></div><div style="position: relative; top: 0px;"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative;" draggable="true"><pre style="top: 0px; left: 0px; visibility: hidden;" class="CodeMirror-cursor"> </pre><div style=""><pre><span class="cm-builtin">float</span><span class="cm-null">(</span><span class="cm-string">'5'</span><span class="cm-null">)</span></pre></div></div></div></div></div></div></div></div></div><div style="display: -moz-box;" class="output vbox"><div class="hbox output_area"><div class="prompt output_prompt">Out[53]:</div><div class="box_flex1 output_subarea output_text"><pre>5.0</pre></div></div></div></div><div tabindex="2" class="cell border-box-sizing code_cell vbox"><div class="input hbox"><div class="prompt input_prompt">In [54]:</div><div class="input_area box-flex1"><div class="CodeMirror CodeMirror-focused"><div style="overflow: hidden; position: relative; width: 1px; height: 0px; top: 0px; left: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-ipython"><div style="position: relative; height: 30px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre><span>float(5)</span></pre></div><div style="position: relative; top: 0px;"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative;" draggable="true"><pre style="top: 0px; left: 0px;" class="CodeMirror-cursor"> </pre><div style=""><pre><span class="cm-builtin">float</span><span class="cm-null">(</span><span class="cm-number">5</span><span class="cm-null">)</span></pre></div></div></div></div></div></div></div></div></div><div style="display: -moz-box;" class="output vbox"><div class="hbox output_area"><div class="prompt output_prompt">Out[54]:</div><div class="box_flex1 output_subarea output_text"><pre>5.0</pre></div></div></div></div><div tabindex="2" class="cell border-box-sizing code_cell vbox"><div class="input hbox"><div class="prompt input_prompt">In [57]:</div><div class="input_area box-flex1"><div class="CodeMirror CodeMirror-focused"><div style="overflow: hidden; position: relative; width: 1px; height: 0px; top: 0px; left: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-ipython"><div style="position: relative; height: 30px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre><span>list(), list([1,2,3])</span></pre></div><div style="position: relative; top: 0px;"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative;" draggable="true"><pre style="top: 0px; left: 0px;" class="CodeMirror-cursor"> </pre><div style=""><pre><span class="cm-builtin">list</span><span class="cm-null">(), </span><span class="cm-builtin">list</span><span class="cm-null">([</span><span class="cm-number">1</span><span class="cm-null">,</span><span class="cm-number">2</span><span class="cm-null">,</span><span class="cm-number">3</span><span class="cm-null">])</span></pre></div></div></div></div></div></div></div></div></div><div style="display: -moz-box;" class="output vbox"><div class="hbox output_area"><div class="prompt output_prompt">Out[57]:</div><div class="box_flex1 output_subarea output_text"><pre>([], [1, 2, 3])</pre></div></div></div></div><div tabindex="2" class="cell border-box-sizing code_cell vbox"><div class="input hbox"><div class="prompt input_prompt">In [58]:</div><div class="input_area box-flex1"><div class="CodeMirror CodeMirror-focused"><div style="overflow: hidden; position: relative; width: 1px; height: 0px; top: 0px; left: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-ipython"><div style="position: relative; height: 30px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre><span>tuple([1,2,3])</span></pre></div><div style="position: relative; top: 0px;"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative;" draggable="true"><pre style="top: 0px; left: 0px;" class="CodeMirror-cursor"> </pre><div style=""><pre><span class="cm-builtin">tuple</span><span class="cm-null">([</span><span class="cm-number">1</span><span class="cm-null">,</span><span class="cm-number">2</span><span class="cm-null">,</span><span class="cm-number">3</span><span class="cm-null">])</span></pre></div></div></div></div></div></div></div></div></div><div style="display: -moz-box;" class="output vbox"><div class="hbox output_area"><div class="prompt output_prompt">Out[58]:</div><div class="box_flex1 output_subarea output_text"><pre>(1, 2, 3)</pre></div></div></div></div><div tabindex="2" class="cell border-box-sizing code_cell vbox"><div class="input hbox"><div class="prompt input_prompt">In [61]:</div><div class="input_area box-flex1"><div class="CodeMirror CodeMirror-focused"><div style="overflow: hidden; position: relative; width: 1px; height: 0px; top: 0px; left: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-ipython"><div style="position: relative; height: 82px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre><span>values = ['a', 'b', 'c', 'd']</span></pre></div><div style="position: relative; top: 0px;"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative;" draggable="true"><pre style="top: 0px; left: 0px;" class="CodeMirror-cursor"> </pre><div style=""><pre><span class="cm-variable">keys</span><span class="cm-null"> = </span><span class="cm-variable">range</span><span class="cm-null">(</span><span class="cm-number">4</span><span class="cm-null">)</span></pre><pre><span class="cm-variable">values</span><span class="cm-null"> = [</span><span class="cm-string">'a'</span><span class="cm-null">, </span><span class="cm-string">'b'</span><span class="cm-null">, </span><span class="cm-string">'c'</span><span class="cm-null">, </span><span class="cm-string">'d'</span><span class="cm-null">]</span></pre><pre><span class="cm-variable">dct</span><span class="cm-null"> = </span><span class="cm-builtin">dict</span><span class="cm-null">(</span><span class="cm-variable">zip</span><span class="cm-null">(</span><span class="cm-variable">keys</span><span class="cm-null">, </span><span class="cm-variable">values</span><span class="cm-null">))</span></pre><pre><span class="cm-variable">dct</span></pre></div></div></div></div></div></div></div></div></div><div style="display: -moz-box;" class="output vbox"><div class="hbox output_area"><div class="prompt output_prompt">Out[61]:</div><div class="box_flex1 output_subarea output_text"><pre>{0: 'a', 1: 'b', 2: 'c', 3: 'd'}</pre></div></div></div></div><div tabindex="2" class="cell border-box-sizing code_cell vbox"><div class="input hbox"><div class="prompt input_prompt">In [62]:</div><div class="input_area box-flex1"><div class="CodeMirror CodeMirror-focused"><div style="overflow: hidden; position: relative; width: 1px; height: 0px; top: 0px; left: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-ipython"><div style="position: relative; height: 30px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre><span>dict(foo=1, bar=2, baz=3)</span></pre></div><div style="position: relative; top: 0px;"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative;" draggable="true"><pre style="top: 0px; left: 0px;" class="CodeMirror-cursor"> </pre><div style=""><pre><span class="cm-builtin">dict</span><span class="cm-null">(</span><span class="cm-variable">foo</span><span class="cm-null">=</span><span class="cm-number">1</span><span class="cm-null">, </span><span class="cm-variable">bar</span><span class="cm-null">=</span><span class="cm-number">2</span><span class="cm-null">, </span><span class="cm-variable">baz</span><span class="cm-null">=</span><span class="cm-number">3</span><span class="cm-null">)</span></pre></div></div></div></div></div></div></div></div></div><div style="display: -moz-box;" class="output vbox"><div class="hbox output_area"><div class="prompt output_prompt">Out[62]:</div><div class="box_flex1 output_subarea output_text"><pre>{'bar': 2, 'baz': 3, 'foo': 1}</pre></div></div></div></div><div tabindex="2" class="cell border-box-sizing code_cell vbox"><div class="input hbox"><div class="prompt input_prompt">In [63]:</div><div class="input_area box-flex1"><div class="CodeMirror CodeMirror-focused"><div style="overflow: hidden; position: relative; width: 1px; height: 0px; top: 0px; left: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-ipython"><div style="position: relative; height: 30px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre><span>unicode('abcd')</span></pre></div><div style="position: relative; top: 0px;"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative;" draggable="true"><pre style="top: 0px; left: 0px;" class="CodeMirror-cursor"> </pre><div style=""><pre><span class="cm-builtin">unicode</span><span class="cm-null">(</span><span class="cm-string">'abcd'</span><span class="cm-null">)</span></pre></div></div></div></div></div></div></div></div></div><div style="display: -moz-box;" class="output vbox"><div class="hbox output_area"><div class="prompt output_prompt">Out[63]:</div><div class="box_flex1 output_subarea output_text"><pre>u'abcd'</pre></div></div></div></div><div tabindex="2" class="cell text_cell border-box-sizing"><div style="display: none;" class="text_cell_input"><div class="CodeMirror"><div style="overflow: hidden; position: relative; width: 1px; height: 0px;"><textarea style="position: absolute; width: 2px;" wrap="off" autocorrect="off" autocapitalize="off"></textarea></div><div class="CodeMirror-scroll cm-s-default"><div style="position: relative; height: 6px;"><div style="position: absolute; height: 0; width: 0; overflow: hidden;"><pre>x</pre></div><div style="position: relative"><div style="display: none;" class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div><div class="CodeMirror-lines"><div style="position: relative" draggable="true"><pre class="CodeMirror-cursor"> </pre><div></div></div></div></div></div></div></div></div><div tabindex="-1" class="text_cell_render rendered_html"><h3>Exercises</h3>
<ul>
<li>Given that you have a list of keys and a list of values, how
would you create a <code>dict</code> containing the key/value pairs</li>
<li>Write a function that converts a list of ASCII values to a
string. Test it on the string <code>[86, 77, 87, 97, 114, 101]</code></li>
</ul></div></div><div style="height: 30%;" class="end_space"></div></body></html>