如何判断一个序列是 sequence 类型?
from collections import Sequence
isinstance(a,Sequence)
例如:
>>> from collections import Sequence
>>> isinstance("abc",Sequence)
True
>>> isinstance((1),Sequence)
False
>>> isinstance((1,),Sequence)
True
>>> isinstance([1],Sequence)
True
序列类型的具体解释: Python 中的 sequence 类型