我是

Python新手,我正在编写一个程序只是为了好玩.我的程序包含三个.py文件(假设是a.py,b.py,c.py). a将调用b或c中的函数,具体取决于用户的选项.完成第一轮后,它会询问用户是想继续还是只是退出程序.如果他们选择继续,它会再次询问是否应该运行b或c.

我遇到的问题是,第一次,一个将调用函数完全正常,它运行平稳,然后当我选择继续它再次调用任何函数完全正常,它将进入函数,但然后该功能在第一步中陷入困境.

该程序没有终止,没有给出错误.它接受raw_input变量,但不会继续.我想知道是否有某种方法迫使它接受变量,然后继续这个过程(让它“解开”).我已经尝试过传递下一行了.那没用.

以下是从请求继续开始所需的步骤：

Continue = tkMessageBox.askyesno('Cypher Program', 'I have completed the task'

+ '\nWould you like to do anything else?')

## This is in a.py;

if Continue == True:

cyp()

def cyp():

global root

root = Tk()

root.title("Cypher Program")

root['padx'] = 40

root['pady'] = 20

textFrame = Frame(root)

Label(root, text = 'What would you like to do?').pack(side = TOP)

widget1 = Button(root, text = 'Encrypt a file', command = encrypt)

widget1.pack(side = LEFT)

widget2 = Button(root, text = 'Decrypt a file', command = decrypt)

widget2.pack(side = RIGHT)

widget3 = Button(root, text = 'Quit', command = quitr)

widget3.pack(side = BOTTOM)

root.mainloop()

def encrypt():

root.destroy()

encrypt3.crypt()

##Then from there it goes to b.py;

def crypt():

entry('Enter a file to encrypt:', selectFile)

def entry(msg1, cmd):

global top

top = Toplevel() ##changed it to Toplevel

top.title("File Encrypion")

top['padx'] = 40

top['pady'] = 20

textFrame = Frame(top)

entryLabel = Label(textFrame)

entryLabel['text'] = msg1

entryLabel.pack(side = LEFT)

global entryWidget

entryWidget = Entry(textFrame)

entryWidget['width'] = 50

entryWidget.pack(side = LEFT)

textFrame.pack()

button = Button(top, text = "Submit", command = cmd)

button.pack()

button.bind('', cmd)

top.mainloop()

def selectFile():

if entryWidget.get().strip() == "":

tkMessageBox.showerror("File Encryption", "Enter a file!!")

else:

global enc

enc = entryWidget.get().strip() + '.txt'

top.destroy() ##gets stuck here

##This is the rest of crypt(). It never returns to the try statement

try:

view = open(enc)

except:

import sys

sys.exit(badfile())

text = ''

最佳答案 您需要重新构建代码以仅创建一次根窗口,并且只调用一次mainloop. Tkinter的设计不能在单个进程中多次创建和销毁root.

如果需要多个窗口,请使用Toplevel命令创建其他窗口.