How to split a string of space separated numbers into integers?

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Question :

How to split a string of space separated numbers into integers?

I have a string "42 0" (for example) and need to get an array of the two integers. Can I do a .split on a space?

Asked By: Jonathan


Answer #1:

Use str.split():

>>> "42 0".split()  # or .split(" ")
['42', '0']

Note that str.split(" ") is identical in this case, but would behave differently if there were more than one space in a row. As well, .split() splits on all whitespace, not just spaces.

Using map usually looks cleaner than using list comprehensions when you want to convert the items of iterables to built-ins like int, float, str, etc. In Python 2:

>>> map(int, "42 0".split())
[42, 0]

In Python 3, map will return a lazy object. You can get it into a list with list():

>>> map(int, "42 0".split())
<map object at 0x7f92e07f8940>
>>> list(map(int, "42 0".split()))
[42, 0]
Answered By: Lauritz V. Thaulow

Answer #2:

text = "42 0"
nums = [int(n) for n in text.split()]
Answered By: kindall

Answer #3:

l = (int(x) for x in s.split())

If you are sure there are always two integers you could also do:

a,b = (int(x) for x in s.split())

or if you plan on modifying the array after

l = [int(x) for x in s.split()]
Answered By: GWW

Answer #4:

This should work:

[ int(x) for x in "40 1".split(" ") ]
Answered By: Bruno

Answer #5:

Of course you can call split, but it will return strings, not integers. Do

>>> x, y = "42 0".split()
>>> [int(x), int(y)]
[42, 0]


[int(x) for x in "42 0".split()]
Answered By: Fred Foo

Answer #6:

Here is my answer for python 3.

some_string = "2 3 8 61 "

list(map(int, some_string.strip().split()))
Answered By: livelifelively

Answer #7:

Other answers already show that you can use split() to get the values into a list. If you were asking about Python’s arrays, here is one solution:

import array
s = '42 0'
a = array.array('i')
for n in s.split():

Edit: A more concise solution:

import array
s = '42 0'
a = array.array('i', (int(t) for t in s.split()))
Answered By: GreenMatt

Answer #8:

I suggest checking if the substring is a digit:

In [1]: [int(i) for i in '1 2 3a'.split() if i.isdigit()]
Out[1]: [1, 2]
Answered By: Dos

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