[Patches] [ python-Patches-1468808 ] tkFont: simple fix to error at shutdown

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Patches item #1468808, was opened at 2006-04-11 19:48
Message generated for change (Settings changed) made by gbrandl
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Category: Tkinter
Group: None
>Status: Closed
>Resolution: Fixed
Priority: 5
Submitted By: Russell Owen (reowen)
Assigned to: Martin v. Löwis (loewis)
Summary: tkFont: simple fix to error at shutdown

Initial Comment:
At shutdown, tkFont may produce the following error
message:
Exception exceptions.AttributeError: "'NoneType' object
has no attribute 'TclError'" in <bound method
Font.__del__ of <tkFont.Font instance at 0x76f418>> ignored

Here's the relevant code as presently implemented:
    def __del__(self):
        try:
            if self.delete_font:
                self._call("font", "delete", self.name)
        except (AttributeError, Tkinter.TclError):
            pass

apparently Tkinter doesn't always exist at shutdown, so
Tkinter.TclError becomes None.TclError, which causes
the trouble.

Here's the trivial fix:

    def __del__(self):
        try:
            if self.delete_font:
                self._call("font", "delete", self.name)
        except Exception:
            pass

Note that this relies on the new exception hierachy in
python 2.5. If this is to be used in 2.4.x then one
should include the usual guard lines before "except
Exception:"
        except (SystemExit, KeyboardInterrupt):
           raise

----------------------------------------------------------------------

Comment By: Georg Brandl (gbrandl)
Date: 2006-04-12 15:29

Message:
Logged In: YES 
user_id=849994

Thanks, resolved in rev. 45310, 45311.

----------------------------------------------------------------------

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