Confused about traceback

sgmoore · 12-19-2023, 08:39 AM

I am not a python programmer, but I am trying to tweak some plugins and using the source of calibre and some plugins to try to learn both python and calibre and came across something that puzzled me.

I am running calibre-debug -g and running from source and noticed this message when starting up.

[0.56] Constructing main UI...
Traceback (most recent call last):
File "..\calibre\src\calibre\customize\zipplugin.py ", line 48, in get_resources
File "zipfile.py", line 1510, in read
File "zipfile.py", line 1547, in open
File "zipfile.py", line 1476, in getinfo
KeyError: "There is no item named 'commit.txt' in the archive"

Why is there no mention of the plugin that calls zipplugin/get_resources ?

It took me a while, but I finally found where the message comes from and it only appears when running in debug mode, so I'm not worried about the message, but puzzled that the stacktrace/traceback would be missing, what to me, is the most important bit?

Can anyone explain?

kovidgoyal · 12-19-2023, 09:25 AM

There is no guarantee that stack traces must contain the information that humans find most useful. It is simply a trace of what function calls lead up to the unhandled error. Usually, that's enough to track down problems, not always.

12-19-2023, 08:39 AM	#1
sgmoore Zealot Posts: 142 Karma: 642206 Join Date: Mar 2021 Device: Kindle Voyage	Confused about traceback I am not a python programmer, but I am trying to tweak some plugins and using the source of calibre and some plugins to try to learn both python and calibre and came across something that puzzled me. I am running calibre-debug -g and running from source and noticed this message when starting up. [0.56] Constructing main UI... Traceback (most recent call last): File "..\calibre\src\calibre\customize\zipplugin.py ", line 48, in get_resources File "zipfile.py", line 1510, in read File "zipfile.py", line 1547, in open File "zipfile.py", line 1476, in getinfo KeyError: "There is no item named 'commit.txt' in the archive" Why is there no mention of the plugin that calls zipplugin/get_resources ? It took me a while, but I finally found where the message comes from and it only appears when running in debug mode, so I'm not worried about the message, but puzzled that the stacktrace/traceback would be missing, what to me, is the most important bit? Can anyone explain?

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12-19-2023, 09:25 AM	#2
kovidgoyal creator of calibre Posts: 45,617 Karma: 28549044 Join Date: Oct 2006 Location: Mumbai, India Device: Various	There is no guarantee that stack traces must contain the information that humans find most useful. It is simply a trace of what function calls lead up to the unhandled error. Usually, that's enough to track down problems, not always.

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