Closed
Description
Bug summary
When the format kwarg passed to colorbar() is a str, colorbar() currently tries to guess whether it is a %-format or a {}-format string, using
if isinstance(format, str):
# Check format between FormatStrFormatter and StrMethodFormatter
try:
self._formatter = ticker.FormatStrFormatter(format)
_ = self._formatter(0)
except TypeError:
self._formatter = ticker.StrMethodFormatter(format)Even ignoring the (contrieved) case where the format string is valid both as a %-format and a {}-format, there are other failure cases which could be easily handled, specifically format="{x}%" ("I want to format the value with a percent-sign appended to it"): here the _formatter(0) call will fail with a ValueError (which just needs to be caught) rather than a TypeError.
Code for reproduction
# see aboveActual outcome
ValueError raised.
Expected outcome
Format string used as expected.
Additional information
Probably just needs additionally catching ValueError, plus a test.
Operating system
No response
Matplotlib Version
3.8
Matplotlib Backend
No response
Python version
No response
Jupyter version
No response
Installation
from source (.tar.gz)