Adding a string to a string in a list

Question

I have a list containing various strings, and I want to be able to choose a particular element in the list, and concatenate it with a new string.

I thought this might do it:

checklist = [[0] + 'test' for [0] in checklist]

But it doesn't work. Any suggestions?

checklist[index] += 'test' should work. Just make sure that you have the index you want to modify in the index variable. — RevanProdigalKnight
– RevanProdigalKnight, Commented Jul 14, 2014 at 12:37

Deelaka · Accepted Answer · 2014-07-14 13:35:30Z

3

Select the string using its index and add the string to it using the + operator

checklist = ['a','b','c']
checklist[1] += 'd'
print checklist
#['a', 'bd', 'c']

edited Jul 14, 2014 at 13:35

answered Jul 14, 2014 at 12:36

Deelaka

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2 Comments

wim Over a year ago

Correct solution, but there is nothing to do with slice notation here so I'm not sure why you mention it. This is just ordinary indexing, list.__iadd__ to be precise.

Deelaka Over a year ago

@wim wooops, thanks for correcting me on that one :)

wim · Accepted Answer · 2014-07-14 12:36:50Z

1

The free variable in a list comprehension, i.e. the symbol between for and in in your code, must be a valid python identifier.

answered Jul 14, 2014 at 12:36

wim

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