wxGUI: Updated exception handling to fix AttributeNotFound error

[arohanajit]

An error was highlighted mentioning error module 'wx' has no attribute 'PyDeadObjectError' in the relevant code. This PR is to update the code with other relevant exceptions to replace that

[echoix]

Indeed, PyDeadObjectError doesn't exist in the Phoenix version of wxPython (version 4 and after), like explained in the migration docs
https://github.com/wxWidgets/Phoenix/blob/169aacfab65096fe4a609732a5ad15be77c63d4f/docs/MigrationGuide.rst#wxpydeadobjecterror----runtimeerror

It is fine since it was decided in #4890 that we can keep support for only version 4 and up.

[arohanajit]

Indeed, PyDeadObjectError doesn't exist in the Phoenix version of wxPython (version 4 and after), like explained in the migration docs https://github.com/wxWidgets/Phoenix/blob/169aacfab65096fe4a609732a5ad15be77c63d4f/docs/MigrationGuide.rst#wxpydeadobjecterror----runtimeerror

It is fine since it was decided in #4890 that we can keep support for only version 4 and up.

@petrasovaa mentioned an error while downloading sample project to GRASS database and sent this trace

Traceback (most recent call last):
  File "/home/anna/dev/grass/grass/dist.x86_64-pc-linux-
gnu/gui/wxpython/startup/locdownload.py", line 98, in write

self._resize(heigth)
  File "/home/anna/dev/grass/grass/dist.x86_64-pc-linux-
gnu/gui/wxpython/startup/locdownload.py", line 137, in
_resize

self.out.GetParent().parent.sizer.Fit,
AttributeError
:
'LocationDownloadDialog' object has no attribute 'sizer'
. Did you mean: '
Sizer
'?
During handling of the above exception, another exception
occurred:
Traceback (most recent call last):
  File "/home/anna/dev/grass/grass/dist.x86_64-pc-linux-
gnu/gui/wxpython/datacatalog/tree.py", line 1631, in
OnDownloadLocation

self.DownloadLocation(self.selected_grassdb[0])
  File "/home/anna/dev/grass/grass/dist.x86_64-pc-linux-
gnu/gui/wxpython/datacatalog/tree.py", line 1619, in
DownloadLocation

grassdatabase, location, mapset =
download_location_interactively(
  File "/home/anna/dev/grass/grass/dist.x86_64-pc-linux-
gnu/gui/wxpython/startup/guiutils.py", line 329, in
download_location_interactively

loc_download = LocationDownloadDialog(parent=guiparent,
database=grassdb)
  File "/home/anna/dev/grass/grass/dist.x86_64-pc-linux-
gnu/gui/wxpython/startup/locdownload.py", line 447, in
__init__

self.panel = LocationDownloadPanel(parent=self,
database=database)
  File "/home/anna/dev/grass/grass/dist.x86_64-pc-linux-
gnu/gui/wxpython/startup/locdownload.py", line 260, in
__init__

self.CheckItem(self.locations[default])
  File "/home/anna/dev/grass/grass/dist.x86_64-pc-linux-
gnu/gui/wxpython/startup/locdownload.py", line 383, in
CheckItem

self._warning(
  File "/home/anna/dev/grass/grass/dist.x86_64-pc-linux-
gnu/gui/wxpython/startup/locdownload.py", line 407, in
_warning

sys.stdout.write(text)
  File "/home/anna/dev/grass/grass/dist.x86_64-pc-linux-
gnu/gui/wxpython/startup/locdownload.py", line 99, in write

except wx.PyDeadObjectError:
AttributeError
:
module 'wx' has no attribute 'PyDeadObjectError'

[echoix]

There's another PyDeadObject error in

grass/gui/wxpython/mapwin/graphics.py

Line 391 in 8e575c2

except (wx.PyDeadObjectError, KeyError):

[echoix]

This PR is fine by itself. While it won't fix the root issue of the stack trace shared here, as it doesn't address the parent.sizer not found (maybe Sizer?), it does fix one of the errors occurring during exception handling.

So two things to do somewhere else (if wanted): fix the sizer not found causing the issue, and search for other wx.PyDeadObjectError in the repo. I found 2 total, this fixes one.

[petrasovaa]

There's another PyDeadObject error in

grass/gui/wxpython/mapwin/graphics.py

Line 391 in 8e575c2

except (wx.PyDeadObjectError, KeyError):

@arohanajit could you look into that as well?