点击“开始”按钮后，代码产生了ValueError：
“ clicked4”中第58行的文件“ E：\ python \ number猜测trial2.py”
run_game（）
run_game中的文件“ E：\ python \ number猜测trial2.py”，第61行
guess = int（guess_entry.get（））
ValueError：以10为底的int（）无效文字：
有人可以向我解释为什么会产生ValueError吗？
#Import tkinter module and random from tkinter module
from tkinter import *
import random
import time
win = Tk()
win.configure(cursor='gumby', bg='yellow')
win.title('A sImPlE gUeSsInG gAmE')
win.wm_iconbitmap('favicon.ico')
number = random.randint(1, 101) #set number as a random integer
f = Frame(win)
#No play button(NO)
def clicked():
win.destroy()
#Play button (YES)
def clicked1():
#Erase previous screen
l.destroy()
l2.destroy()
NO.destroy()
YES.destroy()
win.title('Are you READY?')
win.wm_iconbitmap('favicon.ico')
win.configure(background = "deep sky blue", cursor='rtl_logo')
f2 = Frame(win)
l3.grid(row = 1, column = 4, columnspan=5)
#'Next' button
NEXT.grid(row = 5, column = 6)
#NEXT button command
def clicked2():
win.title('Are you READY?')
win.wm_iconbitmap('favicon.ico')
win.configure(background = "deep sky blue", cursor='rtl_logo')
f3 = Frame(win)
l3.destroy()
NEXT.destroy()
l4.grid(row = 1, column = 3, columnspan=5)
NEXT2.grid(row = 4, column = 5)
#Ready to begin screen
def clicked3():
win.title('READY?')
l4.destroy()
NEXT2.destroy()
l5.grid(row = 1, column = 3, columnspan=6)
BEGIN.grid(row = 3, column = 6)
#START button's command
def clicked4():
l5.destroy()
BEGIN.destroy()
run_game()
#Submit button's command
def run_game():
guess = int(guess_entry.get())
if guess != number:
print_text = "you guessed {0}.".format(guess)
if guess > number:
print_text = ("That's too high. Guess lower...")
elif guess < number:
print_text = ("That's too low. Guess higher...")
win.text.delete(0.0, END)
win.text.insert(0.0, print_text)
guess_entry.delete(0, END)
else:
print_text = ("That's the right number! Well done!")
win.text.delete(0.0, END)
win.text.insert(0.0, print_text)
start_again()
L2.grid(row=1, column=1)
#Guess box label
L1.grid(row=2, column=1)
#Guess box / add entry box for typing guess
guess_entry.grid(row=2, column=4)
#Submit button
submit.grid(row = 3, column = 4)
# create computer feedback text box
win.text.grid(row = 20, column = 0, columnspan = 5)
#'START AGAIN?' SCREEN
def start_again():
L2.destroy()
L1.destroy()
guess_entry.destroy()
submit.destroy()
win.text.destroy()
AGAIN = Label(win, text = 'Start Again?', bg = 'deep sky blue', fg = 'yellow', font=('Snap ITC', 30))
#Intro
l = Label(win, text = "Welcome to a number game child.", font=('Snap ITC', 30), bg='yellow', fg='slateblue')
l2 = Label(win, text = "Would you like to play?", font=('Snap ITC', 30), bg = 'yellow', fg='slateblue')
l.grid(row = 1, column = 3, columnspan=5)
l2.grid(row = 2, column = 3, columnspan=5)
#Play or not buttons(YES/NO)
NO = Button(win, text = 'NO', command=clicked, relief=RAISED, padx=30, pady=1 )
NO.config(bg='DodgerBlue2', fg='spring green', font=('Snap ITC', 10), bd=6)
NO.grid(row = 4, column = 4)
YES = Button(win, text = 'YES', command=clicked1, relief=RAISED, padx=30, pady=1)
YES.config(bg='DodgerBlue2', fg='spring green', font=('Snap ITC', 10), bd=6)
YES.grid(row = 4, column = 6)
#SCREEN 2
l3 = Label(win, text = 'The rule is simple. You have 5 chances to \n guess what number I am thinking of.', bg = 'deep sky blue', fg = 'yellow', font=('Snap ITC', 30))
NEXT = Button(win, text = 'NEXT', command=clicked2, bd=6,relief=RAISED, bg = 'firebrick1', fg='DarkOrchid1', padx=30, pady=1, font=('Snap ITC', 10))
#SCREEN 3
l4 = Label(win, text = 'I am thinking of a number between 1 to 100.\n Good Luck!', bg = 'deep sky blue', fg = 'yellow', font=('Snap ITC', 20))
NEXT2 = Button(win, text ='NEXT', command=clicked3, bd=6, relief=RAISED, bg = 'firebrick1', fg='DarkOrchid1', padx=30, pady=1, font=('Snap ITC', 10 ))
#SCREEN 4
l5 = Label(win, text = "Are You Ready?", bg = 'deep sky blue', fg = 'yellow', font=('Snap ITC', 30))
BEGIN = Button(win, text = 'BEGIN', command=clicked4, bd=6, relief=RAISED, bg = 'firebrick1', fg='DarkOrchid1', padx=30, pady=1, font=('Snap ITC', 10))
#SCREEN 5
L2 = Label(win, text = 'A Number Guessing Game', bg='yellow', fg='slateblue', underline=1, font=('Papyrus', 18))
L1 = Label(win, text = 'Make your guess here ----->', bg='yellow', fg='slateblue', font=('Papyrus', 18))
guess_entry = Entry(win, bg = 'turquoise', fg = 'magenta2', cursor = 'pencil')
submit = Button(win, text = "OK", command = run_game, bg = 'purple', fg = 'yellow')
win.text = Text(win, width = 35, height = 1, bg='slateblue', fg='springgreen2')
答案 0 :(得分：1)
在给用户机会在输入框中键入任何内容之前，请致电guess_entry.get()。因此，输入框为空，因此guess_entry.get()返回一个空字符串，该字符串不能转换为整数。
最简单的方法是将run_game函数拆分为首次设置游戏的函数和处理每个猜测的函数。我还修复了您的run_game函数中的一些缩进错误，并确定了另外两个问题，我已对此进行了评论。请注意，如果用户键入任何无法转换为整数的内容，这仍将提供相同的ValueError。您可以使用try-catch块或使用entry validation来解决。
def clicked4():
l5.destroy()
BEGIN.destroy()
init_game()
def init_game():
L2.grid(row=1, column=1)
#Guess box label
L1.grid(row=2, column=1)
#Guess box / add entry box for typing guess
guess_entry.grid(row=2, column=4)
#Submit button
submit.grid(row = 3, column = 4)
# create computer feedback text box
win.text.grid(row = 20, column = 0, columnspan = 5)
def run_game():
guess = int(guess_entry.get())
if guess != number:
print_text = "you guessed {0}.".format(guess) # This does nothing, you always overwrite it.
if guess > number:
print_text = ("That's too high. Guess lower...")
elif guess < number:
print_text = ("That's too low. Guess higher...")
win.text.delete(0.0, END)
win.text.insert(0.0, print_text)
guess_entry.delete(0, END)
else:
print_text = ("That's the right number! Well done!")
win.text.delete(0.0, END)
win.text.insert(0.0, print_text)
start_again() # This fires immediately, so you will never see the message
答案 1 :(得分：0)
您是否尝试调试代码？ 尝试打印guess_entry.get（），看看该值是否为整数。 可能是编译器没有将值解析为整数。 您可以使用try-except来处理ValueError异常。
答案 2 :(得分：0)
我插入了这一行 打印“ --->'”，guess_entry.get（），“'” 就在您的行之前 guess = int（guess_entry.get（））
我得到 --->''
因此，看来您的guess_entry.get（）的值是空格 可以解释您的错误。