Python learning function and process control

This article mainly introduces the functions and process control of Python learning in detail. It has certain reference value. Interested friends can refer to it

#Guess the age. Users can guess up to three times.

age = 50
 
i = 0
 
while i < 3:
 
    guess_age = int(input("Please input your answer:"))
 
    if guess_age > age:
 
        print("too big...try again please")
 
    elif guess_age < age:
 
        print("too small...try again please")
 
    else:
 
        print("You guessed it!")
 
        break
 
    i += 1
 
    if i == 3:

#Guess age, ask every three times if you want to continue playing

age = 50
 
for i in range(1,100):
 
    guess_age = int(input("Please input your answer:"))
 
    if guess_age > age:
 
        print("too big...try again please")
 
    elif guess_age < age:
 
        print("too small...try again please")
 
    else:
 
        print("You guessed it !")
 
    if i%3 == 0:
 
        choice = input("Would you like play again? yes or no")
 
        if choice == "yes":
 
            continue
 
        if choice == "no":
 
            break
 
    else:
 
        continue

#Login verification, enter incorrectly three times to lock the user

f = open('c:/user_passwd.txt','r')
 
j = 3
 
system_user_name = str(f.readline())
 
system_passwd = str(f.readline())
 
f.close()
 
for i in range(1,5):
 
    user_name = str(input("Please input your UserID:"))
 
    password = str(input("passwd:"))
 
    if i == 3:
 
        s = open('c:/user_passwd.txt', 'r+')
 
        s.write("\nlocked")
 
        s.close()
 
        print("This user is locked!")
 
        break
 
    else:
 
        if user_name + '\n' == system_user_name and password == system_passwd:
 
            print("Welcome" + user_name + '\n' + "Have a good time!")
 
            break
 
        else:
 
            j -= 1
 
            i += 1

            print("UserID or password is wrong,Please try once again and you have " + \              str(j) + 'times choice')

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