"A First (Real) Example" code not working

[Jason Veldicott]

Hi,

I'm trying to run the code in "A First (Real) Example", with Tk version 8.5, and python 2.6.6, and get the following error msg:

Traceback (most recent call last):

  File "C:\Users\Jaz\Desktop\voice\tk_experiments\firstexample.py", line 14, in <module>

    mainframe = Frame(root, padding="3 3 12 12")

  File "C:\Python26\Lib\lib-tk\Tkinter.py", line 2444, in __init__

    Widget.__init__(self, master, 'frame', cnf, {}, extra)

  File "C:\Python26\Lib\lib-tk\Tkinter.py", line 1932, in __init__

    (widgetName, self._w) + extra + self._options(cnf))

TclError: unknown option "-padding"

I also have the latest version of tcl installed, but it's in c:\tcl and not sure at this point if it's actually being used.

I'm using Python 2.6.6 for compatibility with some other components.

Any suggestions as to why this error is occurring would be appreciated.

Thanks

Jason

[Mark Roseman]

Hi Jason,

The tutorial is assuming Python 3.x.  It is possible to get away with using Python 2.x with a few changes. However, it does rely on the 'themed Tk widgets' (ttk), rather than the standard/classic Tk widgets.  While there are similarities between them when it comes to API, they are not drop-in replacements for each other.  In this case, while the themed frame (ttk.Frame) supports a -padding option, the classic frame does not. 

Hope this helps.

Mark

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[Jason Veldicott]

Thanks for that Mark.  That explains the problem perfectly. Might for now press on with the tute removing offending bits, with option of resorting to adding a more recent installation of python if compatibility problems persist.

Jason