有趣的程序

发送邮件Sendmail

def sendmail(xx,conntent):
    try:
        import smtplib
        from email.mime.text import MIMEText
        from email.utils import formataddr
        msg = MIMEText(conntent, 'plain', 'utf-8')
        msg['From'] = formataddr(["谭付飞", 'tanfufei@aliyun.com'])
        msg['To'] = formataddr(["vattss", 'tanfufei@163.com'])
        msg['Subject'] = "主题"
        server = smtplib.SMTP("smtp.aliyun.com", 25)
        server.login("tanfufei@aliyun.com", "yellow1rose")
        server.sendmail('tanfufei@aliyun.com', [xx, ], msg.as_string())
        server.quit()
    except:
        return  "失败"
    else:
        return  "cc"
while True:
    em=input("请输入邮件地址：")
    co=input("请输入邮件内容：")
    res=sendmail(em,co)
    if res=="cc":
        print("发送成功")
    else:
        print("发送失败")

简单的用户登陆和注册

def login(user,passwd):
    '''
    用于用户登陆
    :param user:用户名
    :param passwd:密码
    :return:
    '''
    f=open('db','r')
    for line in f:
        line_list=line.strip().split('|')       #strip()移除空白和换行符
        if line_list[0]==user  and line_list[1]==passwd:
            return True
    return  False
    pass
def register(ruser,rpasswd):
    '''
    用于用户注册
    :param ruser: 用户名
    :param rpasswd: 密码
    :return:默认返回None
    '''
    f=open('db','a')
    temp='
'+ruser + '|' + rpasswd
    f.write(temp)
    f.close()
    pass
def main():
    res=input("[1]登陆 [2] 注册:")
    if res=='1':
        user=input("请输入用户名：")
        passwd=input("请输入密码:")
        r=login(user,passwd)
        if r:
            print("登陆成功")
        else:
            print("登陆失败")
    elif res=='2':
        ruser=input("请输入用户名：")
        rpasswd=input("请输入密码:")
        register(ruser,rpasswd)
    pass
main()

来自为知笔记(Wiz)