FIX: better error message for shared axes and axis('equal') #21318
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This PR is affected by a re-writing of our history to remove a large number of accidentally committed files see discourse for details. To recover this PR it will need be rebased onto the new default branch (main). There are several ways to accomplish this, but we recommend (assuming that you call the matplotlib/matplotlib remote git remote update
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-- rebased |
lib/matplotlib/axes/_base.py
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| raise RuntimeError("'equal' is not allowed on shared " | ||
| "axes, try 'scaled' instead.") |
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Is the original exception important here, or should we do from None here?
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Is it a RunTimeError that we want to re-raise here, or should we change it to ValueError instead since you are saying that value isn't allowed?
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As above, I'm not sure I can even trigger this so lets try removing...
lib/matplotlib/axes/_base.py
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| self.set_aspect('equal', adjustable='datalim') | ||
| try: | ||
| self.set_aspect('equal', adjustable='datalim') | ||
| except RuntimeError: |
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We only want to catch the above exception, right? Technically, we should make sure not to catch other RuntimeErrors here, either by inspecting the message or by using a custom exception above.
But I'm not sure if we have to be that pedantic. Catching the wrong exception does not change control flow, it could only issue a non-instructive error message.
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OK, looking back at it now, I'm not sure what this is supposed to catch. set_aspect does not call apply_aspect, and apply_aspect is only called at draw time so far as I can tell. I couldn't figure out a test for this, so lets see if anything fails just removing it again.
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Confirmed, this doesn't fail any tests - so I'm not even sure this was reachable. Sorry I don't remember what prompted this int he first place!
PR Summary
Closes #11416
The error message was pretty mysterious if you called
ax.axis('equal')on a shared axes...Not clear that the functionality users are trying to get from this could not be provided, but at least clarifying the error message will help...
PR Checklist
pytestpasses).flake8on changed files to check).flake8-docstringsand runflake8 --docstring-convention=all).doc/users/next_whats_new/(follow instructions in README.rst there).doc/api/next_api_changes/(follow instructions in README.rst there).