tkinter不调用函数的按钮

Question

我是一个初学程序员，试图创建一个程序，允许用户使用tkinter的玩家Rock，Paper，Scissors。我没有在课堂上学过tkinter，但这是我最后的项目，所以我试图学习新的东西来打动人心。

我能弄清楚如何一切的位置，但我的按钮似乎并没有做任何事情。退出按钮有效，但不是其他任何东西。没有解释器错误出现。任何帮助将不胜感激。

from tkinter import * 
from tkinter import ttk 
import random 

def get_computer_hand(): #Picks computer's hand. 

pick = random.randint(1,3) #Randomly chooses a number between 1 and 3. 

if pick == 1: 
    hand = "Rock" 

elif pick == 2: 
    hand = "Paper" 

elif pick == 3: 
    hand = "Scissors" 

return hand 

def setRock(): 
global playerHand 
global computerHand 

playerHand = "Rock" 
computerHand = get_computer_hand() 
runGame(playerHand,computerHand) 

def setPaper(): 
global playerHand 
global computerHand 

playerHand = "Paper" 
computerHand = get_computer_hand() 

runGame(playerHand,computerHand) 

def setScissors(): 
global playerHand 
global computerHand 

playerHand = "Scissors" 
computerHand = get_computer_hand() 
runGame(playerHand,computerHand) 

def setQuit(): 
root.destroy() 

def runGame(player,computer): 

global playerWins 
global computerWins 
global draws 
global win_or_loss 

playerHand = player 
computerHand = computer 

if(player == "Rock"): 

    if(computer == "Paper"): 
     computerWins += 1 
     win_or_loss = "Paper beats Rock. You lose!" 

    elif(computer == "Scissors"): 
     playerWins += 1 
     win_or_loss = "Rock beats Scissors. You win!" 

    else: 
     draws += 1 
     win_or_loss = "Draw!" 

if(player == "Paper"): 

    if(computer == "Rock"): 
     playerWins += 1 
     win_or_loss = "Paper beats Rock. You win!" 

    elif(computer == "Scissors"): 
     computerWins += 1 
     win_or_loss = "Paper beats Rock. You win!" 

    else: 
     draws += 1 
     win_or_loss = "Draw!" 

if(player == "Scissors"): 

    if(computer == "Rock"): 
     computerWins += 1 
     win_or_loss = "Rock beats Scissors. You lose!" 

    elif(computer == "Paper"): 
     playerWins += 1 
     win_or_loss = "Scissors beats Paper. You win!" 

    else: 
     draws += 1 
     win_or_loss = "Draw!" 

root = Tk() 
root.title("Rock Paper Scissors") 

playerWins = 0 
computerWins = 0 
draws = 0 
playerHand = "" 
computerHand = "" 
win_or_loss = "" 

mainFrame = ttk.Frame(root, padding="3 3 12 12") 
mainFrame.grid(column=0, row=0, sticky=(N, W, E, S)) 
mainFrame.columnconfigure(0, weight=1) 
mainFrame.rowconfigure(0, weight=1) 

buttonFrame = ttk.Frame(mainFrame) 
handFrame = ttk.Frame(mainFrame) 

ttk.Label(mainFrame, text="Let's play Rock, Paper, Scissors.   Ready?").grid(column=0,row=0) 

rockButton = ttk.Button(buttonFrame, text="Rock", command = setRock) 
paperButton = ttk.Button(buttonFrame, text="Paper", command = setPaper) 
scissorsButton = ttk.Button(buttonFrame, text="Scissors", command = setScissors) 
quitButton = ttk.Button(buttonFrame, text="Quit", command = setQuit) 

rockButton.pack(side="left",fill=None,expand=False) 
paperButton.pack(side="left",fill=None,expand=False) 
scissorsButton.pack(side="left",fill=None,expand=False) 
quitButton.pack(side="left",fill=None,expand=False) 
buttonFrame.grid(column=0,row=1) 

playerHandLabel = ttk.Label(handFrame, text="You picked: " + playerHand) 
computerHandLabel = ttk.Label(handFrame, text="Computer picked: " +   computerHand) 
playerHandLabel.pack(side="left",fill=None,expand=False) 
computerHandLabel.pack(side="left",fill=None,expand=False) 
handFrame.grid(column=0,row=2) 

winOrLoss = ttk.Label(mainFrame, text=win_or_loss).grid(column=0,row=3) 

ttk.Label(mainFrame, text = "Player Wins: " +   str(playerWins)).grid(column=0,row=4) 
ttk.Label(mainFrame, text = "Computer Wins: " +   str(computerWins)).grid(column=0,row=5) 
ttk.Label(mainFrame, text = "Draws: " + str(draws)).grid(column=0,row=6) 

for child in mainFrame.winfo_children(): child.grid_configure(padx=5, pady=5) 

root.mainloop() 

Answer 1

显示不改变，因为改变标签的文本winOrLoss你需要做的：winOrLoss.configure(text=win_or_loss)，只是改变win_or_loss不会更改标签的内容。

另一种可能性是使用STRINGVAR：

win_or_loss = StringVar() 
winOrLoss = Label(textvariable=win_or_loss) 

，然后，改变标签的内容，你做win_or_loss.set("new string")。