检查python列表中是否有类的实例

Question

如果我有以下代码

class Person:
    pass
me = Person()

people = ['john','doe',me]

检查人员列表中是否存在Person实例的最佳方法是什么？

Answer 1

您可以使用isinstance来检查，

>>> class Person:
...   pass
...
>>> me = Person()
>>> people = ['john','doe',me]
>>> any(isinstance(x, Person) for x in people)
True

Answer 2

您可以进行for循环

found=False
for element in people:
    if element == isinstance(element,Person):
        found = True
        break
print(found)