rock_paper_scissor_game.py

from random import randint
#taking case insensitive choices
choice = ['rock','paper','scissors']
ch = 'y'
rounds = 0

#function to take player choice
def player_choice():
    plr_ch = input("\nPlease input complete word.\nEnter your choice Rock / Paper / Scissors: ")

    #player can input other char so check to ensure that cannot be broken
    if plr_ch.lower() and plr_ch.lower() in ('rock','paper','scissors'):
        return plr_ch.lower()
    else:
        print("\nWrong choice!! Retry !!")
        player_choice()

#function with parameter to get result on every choice
def get_result(plr_ch):
    comp_choice = choice[randint(0,2)]
    print("\nComputer chose:",comp_choice,"\n")

    #basic game rules
    if plr_ch == comp_choice:
        result = "tie"
        print('{} is same as {}! No score change!'.format(plr_ch.upper(), comp_choice.upper()))
    elif comp_choice == 'scissors' and plr_ch == 'rock':
        result = 'win'
        print('ROCK crushes SCISSORS! You win! Score +1')
    elif comp_choice == 'paper' and plr_ch == 'scissors': 
        result = 'win'
        print('SCISSORS cut PAPER! You win! Score +1')
    elif comp_choice == 'rock' and plr_ch == 'paper': 
        result = 'win'
        print('PAPER covers ROCK! You win! Score +1')

    #if it does not match any of the win criteria then add 1 to loss and 
    #display loss message 
    else: 
        result = 'lose'
        print('You lose! Score -1')
    return result

#function to update the scores
def update_score(result):
    global wins, loss, tie
    if result == 'win':
        wins += 1
    elif result == 'lose':
        loss += 1
    else:
        tie += 1

#function to run the game till user defined rounds
def game(rounds):
    tot_score = 0
    global round_result
    for i in range(0,rounds):
        print("\nReady for Round", i+1)
        pc = player_choice()
        res = get_result(pc)
        round_result.append(res)
        update_score(res)
        tot_score = wins - loss  # we can ignore tie as tie score is 0
        print("\nAfter round",(i+1),"your score is: ",tot_score)

    #at the end of all rounds we return total score
    return tot_score

#to take the number of rounds from user
def game_rounds(r = 0):
    r = input("\nEnter how many rounds you want to play: ")

    #to ensure number is integer and code doesn't crash on other values
    try:
        global rounds
        rounds = int(r)
    except:
        print("\nWrong Input! Enter a number!")
        game_rounds()

def main():
    global ch, round_result
    print("\nWelcome to Rock, Paper, Scissors Game.\nRules are simple")
    print('''\nWinning Rules are as follows:
    Rock vs Paper -> Paper wins Rock Losses
    Rock vs Scissors -> Rock wins Scissors Losses
    Paper vs Scissors -> Scissors wins Paper Losses\n
    For each win you get 1 point 
    If you lose -1 point
    And if its a tie 0 point\n''')


    game_rounds()
    ts = game(rounds)

    #displaying results after all  rounds
    print("\nAfter",rounds,"rounds, your final score is: ",ts)
    print("\nYou have {} wins, {} ties and {} losses!".format(wins,tie,loss))
    print("\nRound wise result is",round_result)
    ch = input("\nDo you want to continue? Enter y for yes any other char to exit: ")

while(ch == 'y' or ch == 'Y'):
    wins = 0
    loss = 0
    tie = 0

    round_result = []
    rounds
    main()
print("\nSee you Again!!")