类的嵌套

类的嵌套

class F1:
    def __init__(self):
        self.name='tom'
class F2:
    def __init__(self,b):
        self.age=b
class F3:
    def __init__(self,c):
        self.classes=c
f1=F1()
f2=F2(f1)
f3=F3(f2)
print(f3.classes.age.name)
#运行结果
tom