如何在 Python 中检查对象是否可迭代？
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How to check if an object is iterable in Python?
提问by Boaz
How does one check if a Python object supports iteration, a.k.a an iterable object (see definition
如何检查 Python 对象是否支持迭代，又名可迭代对象（见定义
Ideally I would like function similar to isiterable(p_object)returning True or False (modelled after isinstance(p_object, type)).
理想情况下，我想要类似于isiterable(p_object)返回 True 或 False 的功能（在 之后建模isinstance(p_object, type)）。
回答by user225312
You can check for this using isinstanceand collections.Iterable
您可以使用isinstance和collections.Iterable
>>> from collections import Iterable
>>> l = [1, 2, 3, 4]
>>> isinstance(l, Iterable)
True
回答by Xavier Barbosa
Try this code
试试这个代码
def isiterable(p_object):
try:
it = iter(p_object)
except TypeError:
return False
return True
回答by S.Lott
You don't "check". You assume.
你不“检查”。你假设。
try:
for var in some_possibly_iterable_object:
# the real work.
except TypeError:
# some_possibly_iterable_object was not actually iterable
# some other real work for non-iterable objects.
It's easier to ask forgiveness than to ask permission.
请求宽恕比请求许可容易。
