组合:
class A():
def __init__(self,x):
self.num = x
class B():
def __init__(slef,x)
self.num = x
class C():
def __init__(slef,x,y)
self.A = A(x)
self.A = B(y)
def print_jisuan(slef):
print('总共有%dA%dB'%(self.A.num,self.B.num))
python属性名和方法名不能相同!否则无法正常运行!