#类也是对象，type创建类的类
def create_class(name):
if name == "user":
class User:
def __str__(self):
return "user"
return User
elif name == "company":
class Company:
def __str__(self):
return "company"
return Company
#type动态创建类
# User = type("User", (), {}) #名称，继承（要继承的base类），属性或方法（但是要字典形式）
def say(self):
return "i am user"
# return self.name
class BaseClass():
def answer(self):
return "i am baseclass"
class MetaClass(type): #继承type为元类
def __new__(cls, *args, **kwargs):
return super().__new__(cls, *args, **kwargs)
from collections.abc import *
#什么是元类， 元类是创建类的类 对象<-class(对象)<-type
class User(metaclass=MetaClass):
def __init__(self, name):
self.name = name
def __str__(self):
return "user"
#python中类的实例化过程，会首先寻找metaclass，通过metaclass去创建user类
#type去创建类对象，实例
if __name__ == "__main__":
# MyClass = create_class("user")
# my_obj = MyClass()
# print(type(my_obj))
# User = type("User", (BaseClass, ), {"name":"user", "say":say})
my_obj = User(name="bobby")
print(my_obj)
