Python Introductory Exercises 2

1, making forms

Loop Prompt user input: User name, password, mailbox (requires user input longer than 20 characters, if more than the first 20 characters are valid)

If the user enters Q or Q to exit the program, the user input is displayed in a tabular format

User_input = None #用户名的初始值pwd = None #密码的初始值email = None #邮箱地址的初始值public = None #公共变量名初始值flag = False #标志位while Not flag: #当flag不为False时, execute the following code block print (' Warm reminder: If you need to exit the program, press "Q" or "Q" to exit ') public = input (' Please enter your user name: ') #提示用户输入用户名 if Le N (public) <=: #但是用户输入的长度小于或者等20个字符时, first do nothing else:public = public[:20] #但是用户输入的长度大于20个字符 , the first 20 characters in the string are taken if Public.lower ()! = ' Q ': #如果用户输入的字符串中不包含q时, the value entered by the user is assigned to user_inpput user_input = Public Else     : Flag = True #如果用户输入的字符串中包含q时, the flag tag bit is true, the user enters the string containing Q when the user enters Q can exit the program break public = input (' Please enter your password: ') If Len (public) <= 20:pass else:public = public[:20] If public.lower ()! = ' Q ': pwd = pu Blic Else:flag = True Break public = input (' Please enter your e-mail address: ') If Len (public) <= 20:pass E Lse:public = public[:20] If public.lower ()! = ' Q ': email = public Else:flag = True Bre Akuser_output = "' name\tpassword\temail%s\t%s\t%s "% (user_input,pwd,email) print (user_output.expandtabs) ######### #结果输出 ########### # # # #温馨提醒: If you need to quit the program please press "Q" or "Q" to exit Please enter your user name: laiying Please enter your password: 123 Please enter your email address: [email protected] Warm reminder: If you need to exit the program, press "Q" or "Q" Exit Please enter your username: QName password emaillaiying 123 [email protected]

2. Implement an integer addition calculator

such as: content = input (' Please enter content: ') #5 +9 or 1+3

1SUM1 = 0#the initial value of the sum2User_input = input ('Please enter the number you want to calculate:'). Split ('+')#prompts the user for input and splits the user's input by the + sign3  forIteminchUser_input:#iterate over each element entered by a user4     ifItem.isdigit ():#If the user enters a number5user_input = Int (item)#converts a user-entered number to an int type and assigns the converted value to User_input6Sum1 + = User_input#each time the user iterates, the elements entered by the user are added once, and so on7     Else:#If the user enters a message that is not an integer, give the user a hint and exit the program8         Print('you are not entering a number, the program exits')9          BreakTen Else: One     Print(SUM1)#to print a sum value A  - ################## #结果输出 ################## -  the #Please enter the number you want to calculate: 6+10 - # -

Python Introductory Exercises 2