day0python-fullstack

python添加时间

#Time : ${DATE} ${TIME}
#Author : wb
#FileName: ${NAME}.py
#Email : [email protected]
#Software: ${PRODUCT_NAME}
#Blog:https://www.cnblogs.com/BBS2013/

#Time : 2020/5/26 21:36
#Author : wubo
#FileName: login.py
#Email : [email protected]
#Software: PyCharm
#Blog:https://www.cnblogs.com/BBS2013/

for i in range(3):
    _user='wb'
    _passwd='abc123'
    username=input("username:")
    password=input("Password:")
    if username == _user and password==_passwd:
        print("welcome %s login..."% _user)
        break    # 跳出；中断
    else:
        print("invalid username or passwrd")
#代码重复是非常忌讳的事情


#循环loop:有限循环 和 无限循环（死循环）
# for i in range(1,10,2): #步长2
#     print("loop:",i)
# for i in range(1, 10):
#     if i % 2 == 1:            # %取余
#         print("loop:", i)
#
# for i in range(100):
#     if i<50 and i>70:
#         print(i)