如何在Python中检查对象是否可iterable？

Question

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In Python, how do I determine if an object is iterable?

如何检查Python对象是否支持迭代，即iterable对象（see definition）

理想情况下，我希望函数类似于isiterable(p_object)返回True或False（在isinstance(p_object, type)之后建模）。

Answer 1

尝试此代码

def isiterable(p_object):
    try:
        it = iter(p_object)
    except TypeError: 
        return False
    return True

Answer 2

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.

请求原谅比请求允许容易。

Answer 3

您可以使用isinstance和collections.Iterable检查这个

>>> from collections import Iterable
>>> l = [1, 2, 3, 4]
>>> isinstance(l, Iterable)
True