converting string to int python

Question

how can I convert a string to an int in python say I have this array

['(111,11,12)','(12,34,56)'] to [(111,11,12),(12,34,56)]

Any help will be appreciated thanks

@closevoter: I don't see any reason why this should be too localized though you may choose to vote it as a duplicate — Abhijit, Dec 27 '12 at 14:52

eumiro · Answer 1 · 2012-12-28T07:44:28.667

8

import ast
a = "['(111,11,12)','(12,34,56)']"
[ast.literal_eval(b) for b in ast.literal_eval(a)]
# [(111, 11, 12), (12, 34, 56)]

EDIT: if you have a list of strings (and not a string), just like @DSM suggests, then you have to modify it:

a = ['(111,11,12)','(12,34,56)']
[ast.literal_eval(b) for b in a]
# [(111, 11, 12), (12, 34, 56)]

edited Dec 28 '12 at 07:44

answered Dec 27 '12 at 14:50

eumiro

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1

The OP seems to have a list of strings, not a string (the modification is trivial, of course.) – DSM Dec 27 '12 at 17:12
2

@Goranek `ast.literal_eval` is different from the built-in `eval` - it is completely safe to use even when dealing with data from untrusted sources. See http://docs.python.org/2/library/ast.html#ast-helpers for more info. – RocketDonkey Dec 30 '12 at 16:52

score 0 · Accepted Answer · answered Dec 27 '12 at 15:21

0

You could try some re:

import re
src = ['(111,11,12)', '(12,34,56)']
[tuple([int(n) for n in re.findall(r"(\d+),(\d+),(\d+)", s)[0]]) for s in src]

answered Dec 27 '12 at 15:21

petrs

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MGP · Answer 3 · 2012-12-27T16:33:48.377

By reading your question I see you have a list of strings:

l = ['(111,11,12)','(12,34,56)']

and you want to convert that to a list of numbers...

# some cleaning first
number_list = [x.strip('()').split(',') for x in l]
for numbers in number_list:
    numbers[:] = [int(x) for x in numbers]
print number_list

Sorry for that list comprehension parsing, if you're new that looks weird but is a very common python idiom and you should get familiar with it.

score 0 · Answer 4 · answered Dec 27 '12 at 17:26

Have fun!

def customIntparser(n):
    exec("n="+str(n))
    if type(n) is list or type(n) is tuple:
        temps=[]
        for a in n:
            temps.append(customIntparser(str(a)))
        if type(n) is tuple:
            temps=tuple(temps)
        return temps
    else:
        exec("z="+str(n))
        return z

Sample tests:

>>>s = "['(111,11,12)','(12,34,56)']"
>>>a=customIntparser(s)
>>> a
# [(111, 11, 12), (12, 34, 56)]
>a[0][1]
# 11

score -2 · Answer 5 · answered Dec 27 '12 at 14:52

You can convert a string to an int with the int() keyword:

Python 2.7.2 (default, Jun 20 2012, 16:23:33) 
[GCC 4.2.1 Compatible Apple Clang 4.0 (tags/Apple/clang-418.0.60)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> int('42')
42

But the example you give seems to indicate that you want to do this for an entire tuple, not a single integer. If so, you can use the builtin eval function:

>>> eval('(111,111)')
(111, 111)

-1: Your answer is least helpful to the OP's question and please don't suggest the dreaded eval. — Abhijit, Dec 27 '12 at 14:54

converting string to int python

5 Answers5