Exercise on www.practicepython.org

rock_paper_scissors.py

from pandas import DataFrame
rules = "\n'r' for 'rock;\n'p' for 'paper';\n's' for 'scissors'."
pick = ['r', 'p', 's']

m = DataFrame([[None, True, False], [False, None, True], [True, False, None]],
              columns=pick,
              index=pick)
print("Rock-Paper-Scissors Game!\n"+rules)
while True:
    one = input("Player one: ")
    two = input("Player two: ")
    if one not in pick or two not in pick:
        print("Answers are incorrect! Type 'r', 'p' or 's'."+rules)
        continue

    if m[one][two] == True:
        print("Player One won!")
    elif m[one][two] == False:
        print("Player Two won!")
    else:
        print("No sides!")

    if  input("One more game? ->") == 'y':
        continue
    else:
        break