如何检查对象是否可以在Python中迭代？

Question

  

可能重复：
  In Python, how do I determine if an object is iterable?

如何检查Python对象是否支持迭代，a.k.a是可迭代对象（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

您可以使用isinstance和collections.Iterable

进行检查

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

Answer 2

你没有“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.

请求宽恕比要求许可更容易。

Answer 3

试试此代码

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