我目前正在使用tkinter为我的程序创建GUI。当我打开导出窗口，关闭历史记录窗口并尝试关闭导出窗口时，我收到以下错误:
File (filename), line 1883, in __call__
return self.func(*args)
File (filename), line 195, in close_export
partner.export_button.config(state=NORMAL)
File (filename), line 1637, in configure
return self._configure('configure', cnf, kw)
File (filename), line 1627, in _configure
self.tk.call(_flatten((self._w, cmd)) + self._options(cnf))
_tkinter.TclError: invalid command name ".!toplevel.!frame.!frame.!button"
我该如何解决这个问题?
from tkinter import *
from functools import partial # To prevent unwanted windows
import random
class Converter:
def __init__(self):
# Formatting variables...
background_color = "light blue"
# In actual program this is blank and is populated with user calculations
self.all_calc_list = ['0 degrees C is -17.8 degrees F',
'0 degrees C is 32 degrees F',
'24 degrees C is 75.2 degrees F',
'100 degrees C is 37.8 degrees F']
# self.all_calc_list = []
# Converter Main Screen GUI...
self.converter_frame = Frame(width=300, height=300, bg=background_color,
pady=10)
self.converter_frame.grid()
# Temperature Conversion Heading (row 0)
self.temp_converter_label = Label(self.converter_frame, text="Temperature Converter",
font=("Arial", "16", "bold"),
bg=background_color,
padx=10, pady=10)
self.temp_converter_label.grid(row=0)
# history Button (row 1)
self.history_button = Button(self.converter_frame, text="History",
font=("Arial", "14"),
padx=10, pady=10,
command=lambda: self.history(self.all_calc_list))
self.history_button.grid(row=1)
if len(self.all_calc_list) == 0:
self.history_button.config(state=DISABLED)
def history(self, calc_history):
History(self, calc_history)
class History:
def __init__(self, partner, calc_history):
background = "#a9ef99" # Pale green
# disable history button
partner.history_button.config(state=DISABLED)
# Sets up child window (ie: history box)
self.history_box = Toplevel()
# If users press cross at top, closes history and 'releases' history button
self.history_box.protocol('WM_DELETE_WINDOW',
partial(self.close_history, partner))
# Set up GUI Frame
self.history_frame = Frame(self.history_box, width=300, bg=background)
self.history_frame.grid()
# Set up history heading (row 0)
self.how_heading = Label(self.history_frame, text="Calculation History",
font="arial 19 bold", bg=background)
self.how_heading.grid(row=0)
# history text (label, row 1)
self.history_text = Label(self.history_frame,
text="Here are your most recent "
"calculations. Please use the "
"export button to create a text "
"file of all your calculations for "
"this session", wrap=250,
font="arial 10 italic",
justify=LEFT, bg=background, fg="maroon",
padx=10, pady=10)
self.history_text.grid(row=1)
# History Output goes here.. (row 2)
# Generate string from list of calculations...
history_string = ""
if len(calc_history) > 7:
for item in range(0, 7):
history_string += calc_history[len(calc_history)
- item - 1]+"n"
else:
for item in calc_history:
history_string += calc_history[len(calc_history) -
calc_history.index(item) - 1] + "n"
self.history_text.config(text="Here is your calculation "
"history. You can use the "
"export button to save this "
"data to a text file if "
"desired.")
# Label to display calculation history to user
self.calc_label = Label(self.history_frame, text=history_string,
bg=background, font="Arial 12", justify=LEFT)
self.calc_label.grid(row=2)
# Export / Dismiss Buttons Frame (row 3)
self.export_dismiss_frame = Frame(self.history_frame)
self.export_dismiss_frame.grid(row=3, pady=10)
# Export Button
self.export_button = Button(self.export_dismiss_frame, text="Export",
font="Arial 12 bold", command=self.export)
self.export_button.grid(row=0, column=0)
# Dismiss Button
self.dismiss_button = Button(self.export_dismiss_frame, text="Dismiss",
font="Arial 12 bold",
command=partial(self.close_history, partner))
self.dismiss_button.grid(row=0, column=1)
def close_history(self, partner):
# Put history button back to normal...
partner.history_button.config(state=NORMAL)
self.history_box.destroy()
def export(self):
get_export = Export(self)
class Export:
def __init__(self, partner):
background = "#a9ef99" # Pale green
# disable export button
partner.export_button.config(state=DISABLED)
# Sets up child window (ie: export box)
self.export_box = Toplevel()
# If users press cross at top, closes export and 'releases' export button
self.export_box.protocol('WM_DELETE_WINDOW', partial(self.close_export, partner))
# Set up GUI Frame
self.export_frame = Frame(self.export_box, width=300, bg=background)
self.export_frame.grid()
# Set up Export heading (row 0)
self.how_heading = Label(self.export_frame, text="Export / Instructions",
font="arial 14 bold", bg=background)
self.how_heading.grid(row=0)
# Export Instructions (label, row 1)
self.export_text = Label(self.export_frame, text="Enter a filename in the "
"box below and press the "
"Save button to save your "
"calculation history to a "
"text file.",
justify=LEFT, width=40, bg=background, wrap=250)
self.export_text.grid(row=1)
# Warning text (label, row 2)
self.export_text = Label(self.export_frame, text="If the filename you "
"enter below already "
"exists, its contents "
"will be replaced with "
"your calculation history",
justify=LEFT, bg="#ffafaf", fg="maroon",
font="Arial 10 italic", wrap=225, padx=10, pady=10)
self.export_text.grid(row=2, pady=10)
# Filename Entry Box (row 3)
self.filename_entry = Entry(self.export_frame, width=20,
font="Arial 14 bold", justify=CENTER)
self.filename_entry.grid(row=3, pady=10)
# Save / Cancel Frame (row 4)
self.save_cancel_frame = Frame(self.export_frame)
self.save_cancel_frame.grid(row=5, pady=10)
# Save and Cancel Buttons (row 0 of save_cancel_frame)
self.save_button = Button(self.save_cancel_frame, text="Save")
self.save_button.grid(row=0, column=0)
self.cancel_button = Button(self.save_cancel_frame, text="Cancel",
command=partial(self.close_export, partner))
self.cancel_button.grid(row=0, column=1)
def close_export(self, partner):
# Put export button back to normal...
partner.export_button.config(state=NORMAL)
self.export_box.destroy()
# main routine
if __name__ == "__main__":
root = Tk()
root.title("Temperature Converter")
something = Converter()
root.mainloop()
您似乎显式地更改了合作伙伴中的按钮状态，但合作伙伴已被销毁。在尝试设置状态之前，您应该检查按钮是否存在。
def close_export(self, partner):
if partner.export_button.winfo_exists():
partner.export_button.config(state=NORMAL)
self.export_box.destroy()