'''
@Author: your name
@Date: 2020-07-18 19:18:56
@LastEditTime: 2020-07-19 10:28:39
@LastEditors: Please set LastEditors
@Description: In User Settings Edit
@FilePath: \vscode_py\day12.py
'''
# Question 44#
# 使用map映射一个迭代器，并输出
def Q44():
    r=list(map(lambda x:x**2,range(1,21)))   # map的用法就是
    print(r)

# Question 45
# staticmethod
# 类的静态成员函数，在类没有被实例化的时候可以直接运行
class American():
    @staticmethod
    def printNationlity():
        print("I am a American")

# Question 46
# 定义一个class，并定义一个子类
class Newyorker(American):
    @staticmethod
    def printNationlity():
        print("I am a Newyorker")



if __name__ == "__main__":
    # Q44()

    american=American()
    american.printNationlity()
    American.printNationlity()

    petter=Newyorker()
    petter.printNationlity()
    Newyorker.printNationlity()