Python converting list of strings to list of integers

Question

hi I'm trying to convert this list of strings: lists=['111,222','121,121'] into a list of integers but keep running into errors, any advice would be helpful. I've tried:

results=[int(i) for i in lists]
print(results)

but keep getting "invalid literal for int() with base 10: '111,222'"

Please add expected, output and what have you tried... Also this is a pretty common question, are you sure there isn't some other post that answers it? — Dani Mesejo
– Dani Mesejo, Commented Dec 7, 2019 at 0:18
What integer do you expect the string "111,222" to be converted into? — Blorgbeard
– Blorgbeard, Commented Dec 7, 2019 at 0:22
Well, Python doesn't support a thousands separator when converting strings to integers. — JohanC
– JohanC, Commented Dec 7, 2019 at 0:32

Dani Mesejo · Accepted Answer · 2019-12-07 00:25:50Z

4

You need to remove the commas, for example:

lists=['111,222','121,121']
result = [int(s.replace(',', '')) for s in lists]
print(result)

Output

[111222, 121121]

answered Dec 7, 2019 at 0:25

Dani Mesejo

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aminrd · Accepted Answer · 2019-12-07 00:25:29Z

3

This should work

import re

lists=['111,222','121,121']
results = [ int("".join(re.findall('[0-9]+', element))) for element in lists ] 

# results = [111222, 121121]

answered Dec 7, 2019 at 0:25

aminrd

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