Upgrade to Python 3 and update documentation

README.md

@@ -1,9 +1,23 @@
 # svg2mod
 This is a small program to convert Inkscape SVG drawings to KiCad footprint module files.  It uses [cjlano's python SVG parser and drawing module](https://github.com/cjlano/svg) to interpret drawings and approximate curves using straight line segments.  Module files can be output in KiCad's legacy or s-expression (i.e., pretty) formats.  Horizontally mirrored modules are automatically generated for use on the back of a 2-layer PCB.
 
+## Requirements
+
+Python 3
+
+## Installation
+
+```pip3 install git+https://github.com/zirafa/svg2mod```
+
+Note: ```python3 setup.py install``` does not work.
+
+## Example
+
+```svg2mod -i input.svg -p 1.0```
+
 ## Usage
 ```
-usage: svg2mod.py [-h] -i FILENAME [-o FILENAME] [--name NAME] [--value VALUE]
+usage: svg2mod [-h] -i FILENAME [-o FILENAME] [--name NAME] [--value VALUE]
                   [-f FACTOR] [-p PRECISION] [-d DPI] [--front-only] [--format FORMAT]
                   [--units UNITS]
 

svg2mod/svg/svg/svg.py

@@ -262,7 +262,7 @@ def __init__(self, elt=None):
         self.name = ""
         if elt is not None:
 
-            for id, value in elt.attrib.iteritems():
+            for id, value in elt.attrib.items():
 
                 id = self.parse_name( id )
                 if id[ "name" ] == "label":

svg2mod/svg2mod.py

@@ -553,7 +553,7 @@ def _prune( self, items = None ):
         if items is None:
 
             self.layers = {}
-            for name in self.layer_map.iterkeys():
+            for name in self.layer_map.keys():
                 self.layers[ name ] = None
 
             items = self.imported.svg.items
@@ -564,7 +564,7 @@ def _prune( self, items = None ):
             if not isinstance( item, svg.Group ):
                 continue
 
-            for name in self.layers.iterkeys():
+            for name in self.layers.keys():
                 #if re.search( name, item.name, re.I ):
                 if name == item.name:
                     print( "Found SVG layer: {}".format( item.name ) )
@@ -653,7 +653,7 @@ def _write_module( self, front ):
             front,
         )
 
-        for name, group in self.layers.iteritems():
+        for name, group in self.layers.items():
 
             if group is None: continue
 
@@ -1094,7 +1094,7 @@ def _write_library_intro( self ):
 
         # Write index:
         for module_name in sorted(
-            self.loaded_modules.iterkeys(),
+            self.loaded_modules.keys(),
             key = str.lower
         ):
             self.output_file.write( module_name + "\n" )
@@ -1111,7 +1111,7 @@ def _write_preserved_modules( self, up_to = None ):
             up_to = up_to.lower()
 
         for module_name in sorted(
-            self.loaded_modules.iterkeys(),
+            self.loaded_modules.keys(),
             key = str.lower
         ):
             if up_to is not None and module_name.lower() >= up_to: