List

##Introduction

• Heterogeneous data-structure.
• Mutable Data-structure
• Grow & Shrink dynamically

###Functionalities available

• append - adding at the end
• count - count's the number of occurrences
• extend - merging the list

l2 ['good', 'god', 'great']

l [1, 2, 3, 3, 4, 77, 'good god'] l.extend(l2) l [1, 2, 3, 3, 4, 77, 'good god', 'good', 'god', 'great']

l2 ['good', 'god', 'great']

l [1, 2, 3, 3, 4, 77, 'good god', 'good', 'god', 'great'] l.append(l2) l [1, 2, 3, 3, 4, 77, 'good god', 'good', 'god', 'great', ['good', 'god', 'great']]

l[-1] ['good', 'god', 'great'] l[::-1] [['good', 'god', 'great'], 'great', 'god', 'good', 'good god', 77, 4, 3, 3, 2, 1] l [1, 2, 3, 3, 4, 77, 'good god', 'good', 'god', 'great', ['good', 'god', 'great']]

l [1, 2, 3, 3, 4, 77, 'good god', 'good', 'god', 'great', ['good', 'god', 'great']]

• insert - Add entity at a particular position.
• remove - removes by values. Only the first occurrence.Don't return anything
• pop - remove by index. Returns the data
• sort - Sorts data

l = [1,2,3,3,7,8,-3,5] l.sort() l [-3, 1, 2, 3, 3, 5, 7, 8]

l.sort(reverse=True)

l [8, 7, 5, 3, 3, 2, 1, -3]

• reverse - reverses the list

s = 'this is my country and i love it' s[::-1] 'ti evol i dna yrtnuoc ym si siht' l = s.split() l.reverse() l ['it', 'love', 'i', 'and', 'country', 'my', 'is', 'this'] ' '.join(l) 'it love i and country my is this'

s = 'ssdkajskajs dfdf' len(s) 16 l = [1,2,3,77,99,44] len(l) 6 l = [1,2,3,4,5,5555] sum(l) 5570 max(l) 5555 min(l) 1 l = ['hello world','good guy'] len(l[0])