10000 FIX DateFormatter for month names when usetex=True by smartlixx · Pull Request #19849 · matplotlib/matplotlib · GitHub
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FIX DateFormatter for month names when usetex=True #19849

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Merged
merged 2 commits into from
May 14, 2021

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smartlixx
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PR Summary

close #19836

Although a little bit clumsy, this PR can serve as the interim solution to the format of month names when usetex=True. At a long term, some alternative way should be considered, as proposed by @anntzer.

PR Checklist

  • Has pytest style unit tests (and pytest passes).
  • Is Flake 8 compliant (run flake8 on changed files to check).
  • [N/A] New features are documented, with examples if plot related.
  • Documentation is sphinx and numpydoc compliant (the docs should build without error).
  • Conforms to Matplotlib style conventions (install flake8-docstrings and run flake8 --docstring-convention=all).
  • [N/A] New features have an entry in doc/users/next_whats_new/ (follow instructions in README.rst there).
  • [N/A] API changes documented in doc/api/next_api_changes/ (follow instructions in README.rst there).

@smartlixx smartlixx requested a review from anntzer April 2, 2021 08:18
@anntzer anntzer removed their request for review April 2, 2021 08:43
@smartlixx smartlixx force-pushed the FIX_date_usetex branch 3 times, most recently from 3f8c0b4 to 6a417bc Compare May 12, 2021 13:45
@smartlixx smartlixx force-pushed the FIX_date_usetex branch 2 times, most recently from 63ba2ea to 5afc0f2 Compare May 12, 2021 14:19
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@jklymak jklymak left a comment

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This looks good to me @aitikgupta ? @anntzer ?

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@aitikgupta aitikgupta left a comment

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Wouldn't this wrapping fail when we want TeX 'symbols' alongside the date?
For example, ≥ 12th May, 2021, or ≈ August, 2021

import datetime
date = datetime.datetime.today()
str_date = date.strftime('%m/%d/%Y')

label = r"\geq " + str_date
# or
# label = r"\approx " + str_date

_wrap_in_tex(label)               -----> $\mathdefault{\}$geq$\mathdefault{ 05/12/2021}$

Whereas, previously it would've returned simply $\mathdefault{\geq 05/12/2021}$.

I'm not sure if this is a valid usecase, or if _wrap_in_tex is called like this, or even if this should be handled here, but if it is, it would probably mean adding a condition to escape characters if the word is starting with \.

If not, this looks good!

@jklymak
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jklymak commented May 12, 2021

Currently its just a private method for DateFormatter so I think thats OK.

@tacaswell
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@aitikgupta Good instinct! However, in this case because this is an internal function to one of our modules and it is only used in our module, we can make more assumptions about the input (like it is only used in ConiseDateFormatter so we can be less general, only worry about the cases that start with a text month (because we know we will only pass that in), but still get the benefit of de-duplicating a bunch of lines of code that we would have had to write 2x otherwise.

@tacaswell tacaswell merged commit 3665241 into matplotlib:master May 14, 2021
@tacaswell tacaswell modified the milestones: v3.5.0, v3.4.3 May 14, 2021
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@meeseeksdev backport to v3.4.x

meeseeksmachine pushed a commit to meeseeksmachine/matplotlib that referenced this pull request May 14, 2021
QuLogic added a commit that referenced this pull request May 14, 2021
…849-on-v3.4.x

Backport PR #19849 on branch v3.4.x (FIX DateFormatter for month names when usetex=True)
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Month names not set as text when using usetex
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