解包语法**data

class Qtest:

    def __init__(self,name = '', addr='', no=0):
        self.name = name
        self.addr = addr
        self.no = no

    def __str__(self):
        return str(self.name)+str(self.addr)+str(self.no)


if __name__ == '__main__':
    # main()
    a= {'no':999,'name':'888','addr':'777'}
    q = Qtest(**a)
    print(q)

888777999

计算md5

import  hashlib


def main():
    digester = hashlib.md5()
    with open('Python-3.7.3.tar.xz', 'rb') as file:
        for date in iter(lambda: file.read(1024), b''):
            digester.update(date)
    print(digester.hexdigest())


if __name__ == '__main__':
    main()