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Issue #20167: Suppress 3.4 specific 'Exception ignored' messages. 

Original patch by Tal Einat.
This commit is contained in:
Terry Jan Reedy 2014-02-08 04:47:29 -05:00
parent bfd68bf4ac
commit 57e4127781
1 changed files with 23 additions and 4 deletions
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23
Lib/idlelib/MultiCall.py
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@ -57,6 +57,13 @@ _modifier_names = dict([(name, number)
for number in range(len(_modifiers)) for number in range(len(_modifiers))
for name in _modifiers[number]]) for name in _modifiers[number]])
# In 3.4, if no shell window is ever open, the underlying Tk widget is
# destroyed before .__del__ methods here are called. The following
# is used to selectively ignore shutdown exceptions to avoid
# 'Exception ignored' messages. See http://bugs.python.org/issue20167
APPLICATION_GONE = '''\
can't invoke "bind" command: application has been destroyed'''
# A binder is a class which binds functions to one type of event. It has two # A binder is a class which binds functions to one type of event. It has two
# methods: bind and unbind, which get a function and a parsed sequence, as # methods: bind and unbind, which get a function and a parsed sequence, as
# returned by _parse_sequence(). There are two types of binders: # returned by _parse_sequence(). There are two types of binders:
@ -98,7 +105,12 @@ class _SimpleBinder:
def __del__(self): def __del__(self):
if self.handlerid: if self.handlerid:
self.widget.unbind(self.widgetinst, self.sequence, self.handlerid) try:
self.widget.unbind(self.widgetinst, self.sequence,
self.handlerid)
except tkinter.TclError as e:
if e.args[0] == APPLICATION_GONE:
pass
# An int in range(1 << len(_modifiers)) represents a combination of modifiers # An int in range(1 << len(_modifiers)) represents a combination of modifiers
# (if the least significent bit is on, _modifiers[0] is on, and so on). # (if the least significent bit is on, _modifiers[0] is on, and so on).
@ -227,7 +239,11 @@ class _ComplexBinder:
def __del__(self): def __del__(self):
for seq, id in self.handlerids: for seq, id in self.handlerids:
try:
self.widget.unbind(self.widgetinst, seq, id) self.widget.unbind(self.widgetinst, seq, id)
except tkinter.TclError as e:
if e.args[0] == APPLICATION_GONE:
break
# define the list of event types to be handled by MultiEvent. the order is # define the list of event types to be handled by MultiEvent. the order is
# compatible with the definition of event type constants. # compatible with the definition of event type constants.
@ -390,8 +406,11 @@ def MultiCallCreator(widget):
func, triplets = self.__eventinfo[virtual] func, triplets = self.__eventinfo[virtual]
if func: if func:
for triplet in triplets: for triplet in triplets:
try:
self.__binders[triplet[1]].unbind(triplet, func) self.__binders[triplet[1]].unbind(triplet, func)
except tkinter.TclError as e:
if e.args[0] == APPLICATION_GONE:
break
_multicall_dict[widget] = MultiCall _multicall_dict[widget] = MultiCall
return MultiCall return MultiCall