CODEWITHSUNDEEP
pythonmultithreadingtkintertcltktable
Eular
Eular

Reputation: 1807

tkinter.TclError: invalid command name "table"

Okay, first of all I don't know what is the actual problem here so I couldn't come up with a more accurate title. Maybe some of you can edit it to make it accurate

The following is the minimalised code to reproduce the problem I'm having.

from traybar import SysTrayIcon
from cal import Calendar
import Tkinter

class Add():
    def __init__(self,master):
        Calendar(master).pack()

def add(systray):
    root = Tkinter.Tk()
    Add(root)
    root.mainloop()

SysTrayIcon("abc.ico","abc", (('Add',None, add), ) ,default_menu_index=0).start()

The cal and the trabar are these files http://tkinter.unpythonic.net/wiki/TkTableCalendar and https://github.com/Infinidat/infi.systray/blob/develop/src/infi/systray/traybar.py respectively.

If you run this, it will make a icon in the system tray of a windows machine with the options Add and Quit. clicking on the app opens up the calender, no problem. Close the calender and click on the Add again. But this time it doesn't open the calendar and throws the following error

`
Traceback (most recent call last):
File "_ctypes/callbacks.c", line 314, in 'calling callback function'
File "C:\Users\Koushik Naskar\AppData\Roaming\Python\Python27\site-packages\traybar.py", line 79, in WndProc
self._message_dict[msg](hwnd, msg, wparam.value, lparam.value)
File "C:\Users\Koushik Naskar\AppData\Roaming\Python\Python27\site-packages\traybar.py", line 276, in _command
self._execute_menu_option(id)
File "C:\Users\Koushik Naskar\AppData\Roaming\Python\Python27\site-packages\traybar.py", line 283, in _execute_menu_option
menu_action(self)
File "C:\Users\Koushik Naskar\Desktop\So\temp.py", line 11, in add
Add(root)
File "C:\Users\Koushik Naskar\Desktop\So\temp.py", line 7, in __init__
Calendar(master).pack()
File "C:\Users\Koushik Naskar\Desktop\So\cal.py", line 66, in __init__
state='disabled', browsecommand=self._set_selection)
File "C:\Python27\lib\lib-tk\tktable.py", line 118, in __init__
Tkinter.Widget.__init__(self, master, 'table', kw)
File "C:\Python27\lib\lib-tk\Tkinter.py", line 2090, in __init__
(widgetName, self._w) + extra + self._options(cnf))
_tkinter.TclError: invalid command name "table"
`

This problem only appears when I use SysTrayIcon with the Calendar.Instead of Calendar if you use simple Tkinter Button or Label etc. this error doesn't appear. Also I can use the Calendar widget normally (without the SysTrayIcon ) in a usual Tkinter GUI as many times as I want, no error occur there. Now I don't have any clue about whats happenning here and how to fix this. What problem does SysTrayIcon have with Calendar and Why the error doesn't happen the first time I open the GUI? Please help.

Upvotes: 1

Views: 1200

Answers (1)

Terry Jan Reedy
Terry Jan Reedy

Reputation: 19144

TkTableCalendar requies the tktable module, which you have installed in lib-tk (3rd party modules usually go into lib/site-packages) as indicated by this part of the traceback.

File "C:\Python27\lib\lib-tk\tktable.py", line 118, in __init__
Tkinter.Widget.__init__(self, master, 'table', kw)

The tktable module requires that your tcl/tk installation have the tktable extension. That extension defines the 'table' widget. It is not part of the standard tcl/tk that is installed with Python on Windows. Hence

_tkinter.TclError: invalid command name "table"

The tktable source code (probably a mixture of tcl and C) is hosted at SourceForge. This page says that it is part of the ActiveState Batteries Included distribution. I don't know if the free version of AS tcl/tk has all the 'batteries'. And I don't know how to replace the tcl/tk installation you already have with a new one. I personally would use an alternative if possible.

Upvotes: 1

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