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问题描述
我目前有一些类似以下的Python代码:
I currently have a bit of Python code that looks like this:
for set_k in data:
for tup_j in set_k:
for tup_l in tup_j:
问题是,我希望嵌套的 for 语句的数量根据用户输入而有所不同.如果我想创建一个函数,该函数可以生成n个以上的 for 语句,那么我该怎么做呢?
The problem is, I'd like the number of nested for statements to differ based on user input. If I wanted to create a function which generated n number of for statements like those above, how might I go about doing that?
推荐答案
def nfor(data, n=1):
if n == 1:
yield from iter(data)
else:
for element in data:
yield from nfor(element, n=n-1)
演示:
>>> for i in nfor(['ab', 'c'], n=1):
... print(i)
...
ab
c
>>> for i in nfor(['ab', 'c'], n=2):
... print(i)
...
a
b
c
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