Python-剪刀石头布-包括输入用户名和分数计数器

Question

I'm trying to write a somewhat easy version of Rock Paper Scissors in Python 3 for elementary-middle school aged kids to understand easily and hopefully reproduce.

Besides the basic game, I want to incorporate the option for them to input the names for a player1 and player2, using %s so the program will print it back out. I keep getting this error in my o/p:

Player 1 name: me
Player 2 name: you
%s, what do you choose? Rock (1), Paper (2), or Scissors(3)?
**Traceback (most recent call last):
  File "C:/Users/xyz/PycharmProjects/rps/scorekeeping.py", line 11, in <module>
    print("%s, what do you choose? Rock (1), Paper (2), or Scissors(3)?") % player1
TypeError: unsupported operand type(s) for %: 'NoneType' and 'str'**

I'm also trying to include the score counter which updates itself every round (player1 vs player2). Usually it resets to 0 per round for win/tie/lose.

Please help me to see where the code went wrong. Thanks!

---

player1 = input("Player 1 name: ")
player2 = input("Player 2 name: ")

while 1:

    player1score = 0
    player2score = 0

    print("%s, what do you choose? Rock (1), Paper (2), or Scissors(3)?") % player1

    choice1 = input("> ")

    print("%s, what do you choose? Rock (1), Paper (2), or Scissors(3)?") % player2

    choice2 = input("> ")

    if choice1 == choice2 :
        print("Its's a tie.")
    elif choice1 - choice2 == 1 or choice2 - choice1 == 2 :
        print("%s wins.") % player1
        score1 = score1 + 1
    else:
        print("%s wins.") % player2
        score2 = score2 + 1

    print("%s: %d points. %s: %d points.") % (player1, score1, player2, score2)

Answer 1

You're trying to format the return value of your print function. Instead, to format the string you're printing, try:

print("%s, what do you choose? Rock (1), Paper (2), or Scissors(3)?" % player1)

for the first statement, for example. The formatting should occur inside the parenthesis.

In order to convert your input value to an integer, try:

choice1 = int(input("> "))

Currently, you're resetting the score to zero at the start of the while loop. To stop your score counters from resetting, put the

player1score = 0
player2score = 0

before the while loop.