如何从django中的其他函数获取对象

def function1(user):
    # 使用user对象进行操作
    pass

def function2():
    user = User.objects.get(id=1)
    function1(user)

user = None

def function1():
    global user
    user = User.objects.get(id=1)

def function2():
    global user
    # 使用user对象进行操作
    pass

class MyClass:
    user = None

    def function1(self):
        self.user = User.objects.get(id=1)

    def function2(self):
        # 使用self.user对象进行操作
        pass