def funA(desA):
print("It's funA") def funB(desB):
print(desB( ))
print("It's funB") @funA
@funB
def funC():
print("It's funC")
return "return c"
结果：
执行顺序是funA(funB(funC))
1、先执行funC 结果 "return c" 放入到funB()运行 此时输出为 It's funC
2、funB(desb) 运行输出为 return c It's funB
3、funA(desA) 运行因为desA 无返回值为None，所以输出为 It's funA