rps.py

 import random
  
# Print multiline instruction
# performstring concatenation of string
print("Rules of the Rock paper scissor game as follows: \n"
                                +"Rock vs paper->paper wins \n"
                                + "Rock vs scissor->Rock wins \n"
                                +"paper vs scissor->scissor wins \n")
  
while True:
    print("Enter choice \n 1. Rock \n 2. paper \n 3. scissor \n")
      
    # take the input from user
    choice = int(input("User turn: "))
  
    # OR is the short-circuit operator
    # if any one of the condition is true
    # then it return True value
      
    # looping until user enter invalid input
    while choice > 3 or choice < 1:
        choice = int(input("Enter valid input: "))
          
  
    # corresponding to the choice value
    if choice == 1:
        choice_name = 'Rock'
    elif choice == 2:
        choice_name = 'paper'
    else:
        choice_name = 'scissor'
          
    # print user choice 
    print("user choice is: " + choice_name)
    print("\nNow its computer turn.......")
  
    # Computer chooses randomly any number 
    # among 1 , 2 and 3. Using randint method
    # of random module
    comp_choice = random.randint(1, 3)
      
    # looping until comp_choice value 
    # is equal to the choice value
    while comp_choice == choice:
        comp_choice = random.randint(1, 3)
  
    # initialize value of comp_choice_name 
    # variable corresponding to the choice value
    if comp_choice == 1:
        comp_choice_name = 'Rock'
    elif comp_choice == 2:
        comp_choice_name = 'paper'
    else:
        comp_choice_name = 'scissor'
          
    print("Computer choice is: " + comp_choice_name)
  
    print("\n" + choice_name + " V/s " + comp_choice_name + "\n")
  
    # condition for winning
    if((choice == 1 and comp_choice == 2) or
      (choice == 2 and comp_choice ==1 )):
        print("paper wins = ", end = "")
        result = "paper"
          
    elif((choice == 1 and comp_choice == 3) or
        (choice == 3 and comp_choice == 1)):
        print("Rock wins =", end = "")
        result = "Rock"
    else:
        print("scissor wins =", end = "")
        result = "scissor"
  
    # Printing either user or computer wins
    if result == choice_name:
        print("|   == User wins ==")
    else:
        print("|   == Computer wins ==")
          
    print("Do you want to play again? (Y/N)")
    ans = input()
  
  
    # if user input n or N then condition is True
    if ans == 'n' or ans == 'N':
        break
      
# after coming out of the while loop
# we print thanks for playing
print("\nThanks for playing")