如何将字符串列表转换为数值？

Question

如何将字符串列表（每个字符串代表一个数字，即['1', '2', '3'] ）转换为数值。

Answer 1

map ( int , ["1", "2", "3"])

gives

[1, 2, 3]

Answer 2

Use int() and a list comprehensions :

>>> i = ['1', '2', '3']
>>> [int(k) for k in i]
[1, 2, 3]

Answer 3

As Long as the strings are of the form '1' rather than 'one' then you can use the int() function.

Some sample code would be

strList = ['1','2','3']
numList = [int(x) for x in strList]

Or without the list comprehension

strList = ['1','2','3']
numList = []
for x in strList:
    numList.append(int(x))

Both examples iterate through the list on strings and apply the int() function to the value.

Answer 4

Try this method:

>>> int('5')
5

Answer 5

像这样：

map(int, ['1', '2', '3'])

Answer 6

a=['1','2','3']
map(lambda x: int(x),a)

> [1, 2, 3]