How to add a character to the end of every string in a list?

Question

Let's say I have a list:

list = ["word", "word2", "word3"]

and I want to change this list to:

list = ["word:", "word2:", "word3:"]

is there a quick way to do this?

ollien · Accepted Answer · 2019-08-02T17:49:52.313

15

List comprehensions to the rescue!

list = [item + ':' for item in list]

In a list of

['word1', 'word2', 'word3']

This will result in

['word1:', 'word2:', 'word3:']

You can read more about them here.

https://docs.python.org/2/tutorial/datastructures.html#list-comprehensions

edited Aug 02 '19 at 17:49

answered Nov 23 '14 at 19:34

ollien

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score 5 · Answer 2 · edited Aug 01 '19 at 05:26

5

You can use a list comprehension as others have suggesed. You can also use this code:

newlist = map(lambda x: x+':', list)

edited Aug 01 '19 at 05:26

Traxidus Wolf

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answered Nov 23 '14 at 19:35

pad

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1. you should not use the word list as a variable name because it represents python type 2. map does not return a list , type(newlist)== – sagi Apr 25 '20 at 13:57

score 0 · Answer 3 · answered Nov 23 '14 at 19:41

simple question but though a noob friendly answer :)

list = ["word", "word2", "word3"]
n = len(list)
for i in range(n):
    list[i] = list[i] + ':'

print list

strings can be concatenated using '+' in python and and using 'len' function you can find the length of list. iterate i using for loop till n and concatenate ':' to the list eliments. feel free to post but thing of google first :P

How to add a character to the end of every string in a list?

3 Answers3