indices in python code example

Example 1: how to index python

#you can index in a string like:
string='cupcake'
string[0]#returns 'c'
#you can index in a list like:
list = ['red', 'blue', 'green']
list[0]#returns 'red'
list[0][0]#returns[0] of 'red' wich is r

Example 2: how to find index of list of list in python

[(i, colour.index(c))
 for i, colour in enumerate(colours)
 if c in colour]