On Wed, Mar 19, 2025 at 6:50 AM skyjudith JAI <[email protected]> wrote:
> Thank you! Brilliant. That worked. It's something that I (and my
> on-again off-again friend chatgpt) did not figure out. Could you explain
> what you mean by:
> "Please never use blanket exception handling like that." I"m not sure
> what the alternative should be.
>
What he means is that:
except Exception as e:
print("Error during alignment:", e)
Will catch ANY exception, and then swallow it up to make it go away,
leaving you with no idea what went wrong.
So better to maybe catch, print a helpful message and then re-raise the
exception so you'll get the full stack trace.
In practice, particularly behind a GUI, there may be a need for your
program not to crash out. In that cse, you want to capture and log or
print, or something, the full traceback. Google for how, but here's a hint:
https://docs.python.org/3/library/traceback.html#module-traceback
Meanwhile, when debugging, you definitely simply want the Exception to
bubble up :-)
-CHB
>
> Judith
>
>
> On Tue, Mar 18, 2025 at 3:04 PM bwoodsend <[email protected]> wrote:
>
>> If you remove the try/except, the cause is fairly standard.
>> Traceback (most recent call last): File "astroalign.py", line 537, in
>> _find_sources File "sep_pjw.pyx", line 21, in init sep_pjw
>> ModuleNotFoundError: No module named '_version' During handling of the
>> above exception, another exception occurred: Traceback (most recent call
>> last): File "simple_align.py", line 25, in <module> transform, footprint
>> = aa.find_transform(target_image, ref_image)
>> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "astroalign.py", line 314,
>> in find_transform TypeError: Input type for source not supported. [PYI-
>> 1439842:ERROR] Failed to execute script 'simple_align' due to unhandled
>> exception!
>>
>> The fix is just to add --hiddenimport=_version to the build command.
>> (I’d call it a bug in sep_pjw that it’s keeping its version in a top
>> level module rather than say sep_pjw._version but that’s another matter.)
>>
>> Please never use blanket exception handling like that. We’d have fixed
>> this in about 2 seconds if you hadn’t thrown away the stacktrace.
>>
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