如何修复"invalid command name"错误与Tkinter

Question

已解决：正如@furas所说，我已经试图在我已经销毁窗口后试图访问email_text，所以email_text不再存在。

我正在尝试通过使用TKINTER获取条目的电子邮件和密码来自动登录到网站。该代码抓住电子邮件和密码并在网站中输入，并成功登录。但是我遇到了有关email_text.get((行的错误。

最初我有一个prepar((和error((函数，因此，如果登录是毫无疑问的，它将调用error((并提示他们再次登录。那时我有同样的错误，想知道功能中小部件之间的某些冲突是否是一个问题？因此，我只是试图将其简化为一个，但是我仍然遇到同样的错误。我有3个不同版本的此代码，并且一直在移动零件，因此我可能没有从其他2个版本中移动某些内容，但我无法弄清楚我可能会丢失哪个部分。

from Tkinter import *
from PIL import ImageTk,Image
import time
from datetime import tzinfo
from selenium.webdriver.support.ui import Select
chromedriver = "C:UsersAlexDesktopchromedriver"
driver = webdriver.Chrome(chromedriver)
driver.get("https://www.soundclick.com/community/SC4/login.cfm")
def get_email_pass():
    while True:
        email = email_text.get()
        password = pass_text.get()
        my_window.destroy()
        xpathEmail = '//*[@id="email"]'
        loginEmail = driver.find_element_by_xpath(xpathEmail)
        loginEmail.send_keys(email)
        xpathPass = '//*[@id="password"]'
        loginPass = driver.find_element_by_xpath(xpathPass)
        loginPass.send_keys(password)
        xpathLogin = '//*[@id="loginform"]/div[3]/div[2]/input'
        login = driver.find_element_by_xpath(xpathLogin)
        login.click()
        time.sleep(5)
        if driver.current_url == "https://www.soundclick.com/bandAdmin2/default.cfm?ipv=0":
                exit

#open tkinter window
my_window=Tk()
#Title
my_window.title('SoundClick Login')
#Color
my_window.configure(background="deep sky blue")
#Instr 
email_label=Label(my_window, text="Please Enter The Email Used To Sign Into SoundClick")
email_label.config(background="deep sky blue", foreground="white")
#Create Entry
email_text = Entry(my_window)
email_text.pack()
pass_label=Label(my_window, text="Please Enter The Password Used To Sign Into SoundClick")
pass_label.config(background="deep sky blue", foreground="white")
pass_text=Entry(my_window)
pass_text.pack()

#Censor Password
pass_text.config(show="*")
song_text = Entry(my_window)
song_label=Label(my_window, text="Please Enter The Name Of The Song You Want To Promote. Warning:cAsE SensItIvE")
song_label.config(background="deep sky blue", foreground="white")
#When Done button is pressed, run cmd done_button
finish_button = Button(my_window, text="Done",command=get_email_pass)
finish_button.config(background="white")
note_label=Label(my_window, text="This information will not be stored anywhere")
note_label.config(background="deep sky blue", foreground="white")
#Positioning
email_label.grid(row=0, column=0)
email_text.grid(row=0, column=1)
pass_label.grid(row=1, column=0)
pass_text.grid(row=1, column=1)
finish_button.grid(row=3, column=0)
my_window.mainloop()

如果登录成功，则网页应关闭，而是保持打开状态，我会收到此错误：

Traceback (most recent call last):
  File "C:Python27liblib-tkTkinter.py", line 1547, in __call__
    return self.func(*args)
  File "C:UsersAlexDesktopJon.py", line 14, in get_email_pass
    email = email_text.get()
  File "C:Python27liblib-tkTkinter.py", line 2518, in get
    return self.tk.call(self._w, 'get')
TclError: invalid command name ".66283784L"```

Answer 1

@furas是正确的。您正在尝试访问email条目的内容。但是在第一次迭代中，关闭窗口后，您正在尝试再次访问它，但是它已经关闭了！

要解决此问题，您可以将my_window.destroy()从while True循环移动到函数末尾的IF语句，因此窗口只有在您连接后才关闭。