#!/usr/bin/env python

# class A():
#     x = 20
#
#
#     def func(self):
#         global x
#         x = 100
#         print(str(x))  # 打印这个外部变量
#         return x
#
#     x=func()
#     print(x)
#     print("!"*10 +str(x))
#
#
# if __name__ == '__main__':
#     func()

