python - 将字符串列表转换为整数列表

Question

如何将空格分隔的整数输入转换为整数列表？

示例输入：

list1 = list(input("Enter the unfriendly numbers: "))

转换示例：

['1', '2', '3', '4', '5']  to  [1, 2, 3, 4, 5]

Answer 1

map()是你的朋友，它将作为第一个参数给出的函数应用于列表中的所有项目。

map(int, yourlist) 

因为它映射了每个可迭代对象，您甚至可以执行以下操作：

map(int, input("Enter the unfriendly numbers: "))

其中（在 python3.x 中）返回一个地图对象，可以将其转换为列表。我假设您使用的是 python3，因为您使用的是input，而不是raw_input.

Answer 2

一种方法是使用列表推导：

intlist = [int(x) for x in stringlist]

Answer 3

这有效：

nums = [int(x) for x in intstringlist]

Answer 4

你可以试试：

x = [int(n) for n in x]

Answer 5

Say there is a list of strings named list_of_strings and output is list of integers named list_of_int. map function is a builtin python function which can be used for this operation.

'''Python 2.7'''
list_of_strings = ['11','12','13']
list_of_int = map(int,list_of_strings)
print list_of_int 

Answer 6

 l=['1','2','3','4','5']

for i in range(0,len(l)):
    l[i]=int(l[i])

Answer 7

只是好奇你得到'1'，'2'，'3'，'4'而不是1、2、3、4的方式。无论如何。

>>> list1 = list(input("Enter the unfriendly numbers: "))
Enter the unfriendly numbers: 1, 2, 3, 4
>>> list1 = list(input("Enter the unfriendly numbers: "))
Enter the unfriendly numbers: [1, 2, 3, 4]
>>> list1
[1, 2, 3, 4]
>>> list1 = list(input("Enter the unfriendly numbers: "))
Enter the unfriendly numbers: '1234'
>>> list1 = list(input("Enter the unfriendly numbers: ")) 
Enter the unfriendly numbers: '1', '2', '3', '4'
>>> list1
['1', '2', '3', '4']

好的，一些代码

>>> list1 = input("Enter the unfriendly numbers: ")
Enter the unfriendly numbers: map(int, ['1', '2', '3', '4'])
>>> list1
[1, 2, 3, 4]