Python:如何将for循环的结果合并到一个输出中？

Question

numbers = [1, 2, 3]

for number in numbers:
   number = number * 2 

#For the output I will get:
2
4
6

如何修改我的代码以便结果可以合并(例如[2,4,6])而不使用print语句？

Answer 1

使用列表理解:

[num*2 for num in numbers]

>>> numbers = [1, 2, 3]
>>> [num*2 for num in numbers]
[2, 4, 6]
>>>