def func(l):
for i, x in enumerate(l):
while i < len(l) and isinstance(l[i], list):
l[i:i+1] = l[I]
def func(l):
for i, x in enumerate(l):
while i < len(l) and isinstance(l[i], list):
l[i:i+1] = l[I]
本文标题：列表拍平
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