How to change/modify strings different in a list

Question

I don't know if this question has been asked before, but it seems that I can't find the function that I am looking for. I want to add two different string to different strings in a list. Something like this:

old_list: ['spider','cat','iron','super','bat']

old_list: ['spiderman','catwoman','ironman','superwoman','batman']

So I want some kind of function that changes the strings by adding 'man' or 'woman' without making a new list. I think/know it can be done with some kind of for-loop but can't seem to find a easy way of doing it. And I am sorry if this question has been asked before, but I can't really find an answer to this specific function.

Ignacio Vazquez-Abrams · Accepted Answer · 2015-03-10 19:47:25Z

3

Slice-assign back into the list.

>>> ['{}{}'.format(pref, suff) for (pref, suff) in zip(old_list, itertools.cycle(('man', 'woman')))]
['spiderman', 'catwoman', 'ironman', 'superwoman', 'batman']
>>> id(old_list)
43518144
>>> old_list[:] = ['{}{}'.format(pref, suff) for (pref, suff) in zip(old_list, itertools.cycle(('man', 'woman')))]
>>> id(old_list)
43518144
>>> old_list
['spiderman', 'catwoman', 'ironman', 'superwoman', 'batman']

answered Mar 10, 2015 at 19:47

Ignacio Vazquez-Abrams

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2 Comments

user4650985 Over a year ago

thanks for the answer. Is there a more simple way of doing it? I am still new to python and it seems a bit complicated for me.

Ignacio Vazquez-Abrams Over a year ago

You could iterate over the indexes of the elements, but the jury is out on whether or not that is actually "simpler".

spalac24 · Accepted Answer · 2015-03-10 20:54:20Z

0

Just for the sake of a simpler answer, I will post this one:

for i in range(len(old_list)):
    old_list[i] += suffixes[i%len(suffixes)]

Note you can have any number of suffixes.

answered Mar 10, 2015 at 20:54

spalac24

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