Python Operations Development Practice--day1

First, the script function

Login interface

-Enter user name, password

-User name, password is empty, prompt

-Wrong three times lock

-After successful authentication, display welcome login information

Second, flow chart

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Third, Python code

[email protected] day1]# cat login.py

#!/usr/bin/env python

Import Sys

Username = ' Hanyun '

Password = ' hanyun123 '

Retry_count = 0

While True:

user = Raw_input (' Username: '). Strip ()

If len (user) = = 0:

print ' Username cannot be empty! '

Continue

passwd = Raw_input (' Password: '). Strip ()

If Len (passwd) = = 0:

print ' Password cannot be empty! '

Continue

#handle the username and passwd empty issue

#going to the loging Verificaiton part

If user = = Username and passwd = = password:

print ' Welcome%s login Our system! '% user

Break

Else

Retry_count + = 1

print ' wrong username or password,you has%s more chances! '% (3-retry_count)

if Retry_count = = 3:

print ' Your username is locked! '

Sys.exit ()

Iv. function Demonstration

[email protected] day1]# python login.py

Username:fdsaf

Password:cdsaf

Wrong username or password,you has 2 more chances!

Username:ada

Password:cdfd

Wrong username or password,you has 1 more chances!

Username:adfsa

password:333

Wrong username or password,you has 0 more chances!

Your username is locked!

[email protected] day1]# python login.py

Username:afc

Password:123

Wrong username or password,you has 2 more chances!

Username:hanyun

Password:hanyun123

Welcome Hanyun Login Our system!

[email protected] day1]# python login.py

Username:

Username cannot be empty!

Username:fdsfa

Password:dsf

Wrong username or password,you has 2 more chances!

Username:aa

Password:

Password cannot be empty!

Username:

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Python Operations Development Practice--day1