I have started doing the following to watch for exceptions in wxPython.
I'd like any input about (A) the interface, and (B) the frame before I
throw it in the recipes book.
import wx, os, sys
errorframe = None
def watcherrors(function):
'''function decorator to display Exception information.'''
def substitute(*args, **kwargs):
try:
return function(*args, **kwargs)
except Exception:
error_type, error, traceback = sys.exc_info()
mb = wx.MessageDialog(errorframe,
'%s\n\nClick OK to see traceback' % error,
'Error in Run',
wx.OK | wx.CANCEL | wx.ICON_ERROR)
if wx.ID_OK == mb.ShowModal():
mb.Destroy()
from traceback import extract_tb
trace = ['%s line %s in %s:\n\t%s' % (
(os.path.splitext(os.path.split(
name)[1])[0], line, fun, text)
for name, line, fun, text in
extract_tb(traceback)]
mb = wx.MessageDialog(errorframe,
'\n'.join(['%s\n' % error] + trace),
'Run Error w/ Traceback',
wx.OK | wx.ICON_ERROR)
result = mb.ShowModal()
mb.Destroy()
raise
if function.__doc__ is not None:
substitute.__doc__ = function.__doc__
return substitute
You can use it as follows to wrap functions and methods:
@watcherrors
def something(somearg)
if somearg is not None:
raise ValueError(somearg)
You can use this by simply placing '@watcherrors' on the line before a
function or method definition. Some of my questions are:
A) Is there a better name? Perhaps "exceptions" or "watcher"?
B) Is a global the right way to define the parent of the driven
message box, or adding another wrapper layer as follows better?
def exceptionwatcher(base, name):
def watcherrors(....
...
def substitute(*args, **kwargs):
try:
return function(*args, **kwargs)
except Exception:
error_type, error, traceback = sys.exc_info()
errorframe = getattr(base, name, None) ### new code
...
return watcherrors
Wrapping the code this way allows you to say, watcher-by-watcher,
where to get the parent for the message box. You would then use
it as follows:
@exceptionwatcher(someholder, 'frame')
def something(somearg)
if somearg is not None:
raise ValueError(somearg)
C) Stuff I've not even thought of.
--Scott David Daniels
[EMAIL PROTECTED]
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