practicepython.org: Rock Paper Scissors

RPS.py

en_us_winning = [
    "Rock OBLITERATES scissors!",
    "Paper SMOTHERS rock!",
    "Scissors EVISCERATES paper!"
]
en_us = [
    "Rock, Paper, or Scissors?",
    "Player",
    "Enter choice",
    "Invalid choice.",
    "Tie game.",
    "Player 1 is the winner.",
    "Player 2 wins.",
    "Quiting",
]
choices = {
    'q' : -1,
    'r' : 0,
    'p' : 1,
    's' : 2
}

def calcWinner(p1,p2):
    return (p1 - p2) % 3

def entryRequest(num):
    choice = input( "\n\n{0} {1}\n{2}\n{3}: ".format( en_us[1], num, en_us[0], en_us[2] ) ) [0].lower()
    
    valid = False
    while not valid:
        if not choice in choices : 
            choice = input( "\n\n{4}\n{0} {1}\n{2}\n{3}: ".format( en_us[1], num, en_us[0], en_us[2], en_us[3] ) ) [0].lower()
            valid = False
        valid = True
        return choices[choice]
    
while True :
    p1 = entryRequest(1)
    if p1 == -1:
        print(  "{0}...".format( en_us[7] )  )
        break
    print ("\n" * 100)
    p2 = entryRequest(2)
    if p2 == -1: break
    result  = calcWinner(p1,p2)
    if result == 0 : print (  "\n{0}\n".format( en_us[4] )  )
    if result == 1 :
        print ( "\n{0}".format( en_us_winning[p1] )  )
        print (  "{0}".format( en_us[5] )  )
    if result == 2 :
        print ( "\n{0}".format( en_us_winning[p2] )  )
        print (  "{0}".format( en_us[6] )  )