List with duplicated values and suffix

Question

I have a list, a:

a = [\'a\',\'b\',\'c\']

and need to duplicate some values with the suffix _ind added this way (

Answer 1

You can use itertools.chain():

import itertools

l = ['a','b','c']

new_list = list(itertools.chain.from_iterable([[i, i+"_ind"] for i in l]))

print new_list

Output:

['a', 'a_ind', 'b', 'b_ind', 'c', 'c_ind']