Manual
Return true if class is a subclass (direct, indirect or virtual) of classinfo. A class is considered a subclass of itself. classinfo may be a tuple of class objects, in which case every entry in classinfo will be checked. In any other case, a TypeError exception is raised.
直译
如果class是classinfo的一个子类(直接、间接或虚拟)则返回True。一个类通常被认为是它自身的子类,classinfo可以是一个类对象的元组,其中每个输入的类都会被检查到,在其他所有情况下都会引发TypeError异常。
实例
>>> class 优快云:
def __init__(self):