Fix exception causes in debugger.py #12377
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Oh, yeah, I think that would be great in some locations. (Test are passing but User interface is not updating, I'll merge anyway.) |
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(Also I'm pretty sure I saw a thread on Python-idea about that. Started by you maybe ? ) |
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Awesome, I'll work on the rest. Yes, I do think I discussed it on python-ideas a while back :) I personally hate |
This was referenced Jun 10, 2020
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I recently went over Matplotlib, Pandas and NumPy, fixing a small mistake in the way that Python 3's exception chaining is used. If you're interested, I can do it here too. I've done it on just one file right now.
The mistake is this: In some parts of the code, an exception is being caught and replaced with a more user-friendly error. In these cases the syntax
raise new_error from old_errorneeds to be used.Python 3's exception chaining means it shows not only the traceback of the current exception, but that of the original exception (and possibly more.) This is regardless of
raise from. The usage ofraise fromtells Python to put a more accurate message between the tracebacks. Instead of this:You'll get this:
The first is inaccurate, because it signifies a bug in the exception-handling code itself, which is a separate situation than wrapping an exception.
Let me know what you think!