RPS

import random
#CS542Problemset1


Rprob = 0.0
Sprob = 0.0
Pprob = 0.0
rock = 0.0
scissor = 0.0
paper = 0.0
total = 0
userscore = 0
computerscore = 0



def play(Userplay, Compplay):
    global userscore
    global computerscore

    if Userplay == Compplay:
        userscore = userscore + 1
        computerscore = computerscore + 1
        print("Computer : " + str(Compplay) + "\n Tie! \n"  "Score ( You|Computer ) :" + str(userscore) + "|" + str(computerscore))
    elif Userplay == "R" and Compplay == "P":
        computerscore = computerscore + 1
        print("Computer : " + str(Compplay) + "\n You Lose! \n"  "Score ( You|Computer ) :" + str(userscore) + "|" + str(computerscore))
    elif Userplay == "P" and Compplay == "R":
        userscore = userscore + 1
        print("Computer : " + str(Compplay) + "\n You Win! \n"  "Score ( You|Computer ) :" + str(userscore) + "|" + str(computerscore))
    elif Userplay == "S" and Compplay == "R":
        computerscore = computerscore + 1
        print("Computer : " + str(Compplay) + "\n You Lose! \n"  "Score ( You|Computer ) :" + str(userscore) + "|" + str(computerscore))
    elif Userplay == "S" and Compplay == "P":
        computerscore = computerscore + 1
        print("Computer : " + str(Compplay) + "\n You Lose! \n"  "Score ( You|Computer ) :" + str(userscore) + "|" + str(computerscore))
    elif Userplay == "R" and Compplay == "S":
        userscore = userscore + 1
        print("Computer : " + str(Compplay) + "\n You Win! \n"  "Score ( You|Computer ) :" + str(userscore) + "|" + str(computerscore))
    elif Userplay == "P" and Compplay == "S":
        computerscore = computerscore + 1
        print("Computer : " + str(Compplay) + "\n You Lose! \n"  "Score ( You|Computer ) :" + str(userscore) + "|" + str(computerscore))



def probability(count,total):
    if total == 0:
        total = 1
    return float(count/total)


def computernext(input):
    global Rprob
    global Sprob
    global Pprob
    global rock
    global scissor
    global paper
    global total

    if input == 'R':
        rock += 1
        total += 1
    elif input == 'P':
        paper += 1
        total += 1
    elif input == 'S':
        scissor += 1
        total += 1

    Rprob = probability(rock, total)
    Sprob = probability(scissor, total)
    Pprob = probability(paper, total)

    if max(Rprob, Sprob, Pprob) == Rprob:
        return 'P'
    elif max(Rprob, Sprob, Pprob) == Sprob:
        return 'R'
    elif max(Rprob, Sprob, Pprob) == Pprob:
        return 'S'


if __name__ == "__main__":
    game_set = ['R', 'P', 'S']
    firsttime = True
    num = 0
    nextmove = random.choice(game_set)
    n = int(input("How many times would you want to play : "))
    while(num <= n):
        usermove = input("\n Please choose from [R,P,S] : ")
        if(firsttime == True):
            firsttime = False
            computermove = random.choice(game_set)
            play(usermove,computermove)
        else:
            play(usermove,nextmove)
        nextmove = computernext(usermove)
        num = num + 1
    print("\n************************************\n Your score is : "+str(userscore)+ "\n Computer score is : "+str(computerscore))