如何检查对象是否可以在Python中迭代？

Question

可能重复:
在Python中,如何确定对象是否可迭代？

如何检查Python对象是否支持迭代,又称迭代对象(参见定义)

理想情况下,我希望函数类似于isiterable(p_object)返回True或False(建模后isinstance(p_object, type)).

Answer 1

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

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

Answer 2

试试这个代码

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

Answer 3

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.

请求宽恕比要求许可更容易.