threecatsago的博客

形参的名字只是一个在函数体内的象征 我们传进去的变量名不必和形参名一致 自然而然地就把值赋给形参了 def check (state): if state != 2: print ("我要2") else: print("是2") state2 =2 check(state2) ...

class A: pass class B(A): pass class C: pass class D(C): pass print(issubclass(B, A) and issubclass (D, C)) #True class Super: pass class Child(Super): pass class GrandChild(Child): pass print(issubclass(Child, Su