python如何判断变量的数据类型

ip_port = ['219.135.164.245', 3128]

if type(ip_port) is list:

    print('list数组')

else:

    print('其他类型')

ip_port = ['219.135.164.245', 3128]

if isinstance(ip_port, list):

    print('list数组')

else:

    print('其他类型')

class A:

    pass

class B(A):

    pass

isinstance(A(), A)  # returns True

type(A()) == A      # returns True

isinstance(B(), A)    # returns True

type(B()) == A        # returns False