Question

我想了解zip的功能。如果我有以下循环：

for input_value, time_diff in zip(mylist1, mylist2):
    # some stuff

是否相当于：

for input_value in mylist1:
    for time_diff in mylist2:
         # some stuff

如果是这样，这意味着它只是用于压缩嵌套循环，不是吗？谢谢

Answer 1

这些是等价的：

# assuming len(mylist1) == len(mylist2)
for i in range(len(mylist1)):
    input_value = mylist1[i]
    time_diff   = mylist2[i]
    # do stuff 

for input_value, time_diff in zip(mylist1, mylist2):
    # do stuff

从拉链拉链拉链。采用两个（或更多）列表并通过索引将它们捆绑在一起。查看文档中的示例。 https://docs.python.org/2/library/functions.html#zip

>>> x = [1, 2, 3]
>>> y = [4, 5, 6]
>>> zipped = zip(x, y)
>>> zipped
[(1, 4), (2, 5), (3, 6)]

zip为循环做什么

1 个答案: