python exit program gracefully

# 1. Login Program# username = ' Zhangmin '# Password = ' 123456 '# 2 Failures up to 3 times, failed 3 times program exit# If I ==3# Break # 3. Enter account number, password Error alert account, password error# 5. Enter the correct prompt Welcome to XXX LoginUsername = ' Zhangmin 'Password = ' 123456 'i = 0While True: user

to the standard output.Any number of the files can be specified.Options include:[1]: Search your friend ' s email from Friendsbook[2]: Add your friend ' s email to Firendsbook[3]: del your friend ' s email from Firnedsbook[4]: Alter your friend ' s email from Friendsbook[5]: All friends List[6]: Exit the program''' Num=raw_input (' Press the number [1,2,3,4,5]--') if (num== ' 1 '):Sname=raw_input (' Enter

#!/usr/bin/env python# coding:utf-8# xcopy Lib directory and rename all files to *d.libimport osfrom os.path import join,e Xistsimport shutilfrom Win32com.shell Import shell, shellconfrom msvcrt Import Getchroot_path = r "E:\WORKSPACE\SRC" Origlibpath = Root_path + R "\vc\lib\lib18x64" Newlibpath = Root_path + R "\libd\lib18x64" if not EXISTS (Origlibpath): Prin T ("Can ' t find original libs!") Else:if os.path.exists (Newlibpath): Shutil.rmtree (Newl

Shopping Cart Procedureproduct_list = [(' Mac ', 9000),(' Kindle ',(' Tesla ', 900000),(' Python book ',(' bike ', '),]saving = input (' Please input your money: ')Shopping_car = []if Saving.isdigit (): #验证输入的是否为数字格式, if established then continuesaving = Int (saving)While True:#打印商品内容# for I in Product_list:# Print (Product_list.index (i), i)# for I in Enumerate (product_list,1):# Print (i)For i,v in Enumerate (product_list,1):print (i,v) #print (i, '

Requirements: Let the user enter the user name password Authentication successful display welcome information after the error three after the exit program can support multiple users logged in the user 3 times authentication failed, quit the program, restart the program when you try to log on, or lock the state#-*-codin

Product_list = [(' Iphone ', 8000),(' Mac Pro ', 9800),(' Bike ', 800),(' Watch ', 10600),(' Coffee ', 30),]Shopping_list = []Salary = input ("Input your Salary:")If Salary.isdigit ():salary = Int (salary)While True:For Index,item in Enumerate (product_list):Print (Index,item)User_choice = input ("Choose to buy? >>>:")If User_choice.isdigit ():user_choice = Int (user_choice)If User_choice P_item = Product_list[user_choice]If P_ITEM[1] Shopping_list.append (P_item)Salary-= p_item[1]Print ("Your C

13dayJob Title: Level Three menuJob Requirements: data structure: Menu = {' Beijing ': {' Haidian ': {' Five crossings ': {' Soho ': {}, ' NetEase ': {}, ' Google ': {}}, ' Zhongguancun ': {' Iqiyi ': {}, ' Autohome ': {}, ' Youku ': {},}, ' on the ground ': {' Baidu ': {},},}, ' Changping ': { ' Shahe ': {' old boy ': {}, ' Beihang ': {},}, ' Tian Tong Yuan ': {}, ' Huilongguan ': {}, }, ' Chaoyang ': {}, ' Dongcheng ': {},}, ' Shanghai ': {' Minhang

file1PHP2 $filename= "Input_file_name";3 4 $fp=fopen($filename, "R");5 if(!$fp){6 EchoThe Open File$filenamefailed\n ";7 Exit(1);8 }9 Else{Ten while(!feof($fp)){ One //fgets (file,length) does not specify a length of 1024 bytes by default A $buf=fgets($fp); - - $buf=Trim($buf); the if(Empty($buf)){ - Continue; - } - Else{ + Echo $buf." \ n "; - } + } A