[Python] specialbots.UploadRobot().run(): looks like I cannot catch an exception?

In my script, I want to catch the case when user uploading a file to Commons that already exists.

My logs:

Uploading file to commons:commons...
WARNING: API error fileexists-no-change: The upload is an exact duplicate of the current version of [[:File:005a 309 Пацевичи, 21-05-2004.jpg]].
ERROR: Upload error:
Traceback (most recent call last):
File "/home/vitaly/p/upload_to_commons_with_categories_from_iptc/myenv/lib/python3.12/site-packages/pywikibot/specialbots/_upload.py", line 422, in upload_file
success = imagepage.upload(file_url,
^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/vitaly/p/upload_to_commons_with_categories_from_iptc/myenv/lib/python3.12/site-packages/pywikibot/page/_filepage.py", line 325, in upload
return self.site.upload(self, source_filename=filename, source_url=url,
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/vitaly/p/upload_to_commons_with_categories_from_iptc/myenv/lib/python3.12/site-packages/pywikibot/site/_decorators.py", line 93, in callee
return fn(self, *args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/vitaly/p/upload_to_commons_with_categories_from_iptc/myenv/lib/python3.12/site-packages/pywikibot/site/_apisite.py", line 3029, in upload
return Uploader(self, filepage, **kwargs).upload()
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/vitaly/p/upload_to_commons_with_categories_from_iptc/myenv/lib/python3.12/site-packages/pywikibot/site/_upload.py", line 134, in upload
return self._upload(self.ignore_warnings, self.report_success)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/vitaly/p/upload_to_commons_with_categories_from_iptc/myenv/lib/python3.12/site-packages/pywikibot/site/_upload.py", line 435, in _upload
return self.submit(final_request, result, data.get('result'),
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/vitaly/p/upload_to_commons_with_categories_from_iptc/myenv/lib/python3.12/site-packages/pywikibot/site/_upload.py", line 455, in submit
result = request.submit()['upload']
^^^^^^^^^^^^^^^^
File "/home/vitaly/p/upload_to_commons_with_categories_from_iptc/myenv/lib/python3.12/site-packages/pywikibot/data/api/_requests.py", line 1144, in submit
raise pywikibot.exceptions.APIError(**error)
pywikibot.exceptions.APIError: fileexists-no-change: The upload is an exact duplicate of the current version of [[:File:005a 309 Пацевичи, 21-05-2004.jpg]].
[stasherrors: [{'message': 'uploadstash-exception', 'params': ['UploadStashBadPathException', "Path doesn't exist."], 'code': 'uploadstash-exception', 'type': 'error'}];
servedby: mw-api-ext.eqiad.main-64bb4cbfc5-c2h2c;
help: See https://commons.wikimedia.org/w/api.php for API usage. Subscribe to the mediawiki-api-announce mailing list at <https://lists.wikimedia.org/postorius/lists/mediawiki-api-announce.lists.wikimedia.org/&gt
; for notice of API deprecations and breaking changes.]
1 read operation
Script terminated successfully.


I tried try/except:

bot = UploadRobot(
sys.argv[1],
description=description,
keep_filename=True,
ignore_warning=True,
target_site=pywikibot.Site('commons', 'commons'),
summary=summary,
always=True
)

try:
bot.run()
# except pywikibot.exceptions.APIError as e:
# sys.exit('ERROR from Wikimedia API')
except Exception as e:
print('xxxxxxxxxxxxxx')


but exception is not caught.

Also tried post_processor:

def post(file_url, filename):
if filename is None:
# upload failed (duplicate or other error)
print(f"⚠️ Skipped {file_url!r}: already exists or error")
else:
print(f"✅ Uploaded as {filename!r}")

bot = UploadRobot(
sys.argv[1],
description=description,
keep_filename=True,
ignore_warning=True,
target_site=pywikibot.Site('commons', 'commons'),
summary=summary,
always=True,
post_processor=post
)


but also nothing printed from my post()

Related documentation https://doc.wikimedia.org/pywikibot....specialbots.html#specialbots.UploadRobot.run

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