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Commit e46906d

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Merge pull request #16987 from anntzer/case-insensitive-props
Deprecate case-insensitive properties.
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‎doc/api/api_changes_3.3/deprecations.rst

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@@ -426,3 +426,10 @@ future.
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*minor* kwarg to `.Axis.get_ticklocs` will become keyword-only
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Passing this argument positionally is deprecated.
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Case-insensitive properties
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~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Normalization of upper or mixed-case property names to lowercase in
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`.Artist.set` and `.Artist.update` is deprecated. In the future, property
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names will be passed as is, allowing one to pass names such as *patchA* or
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*UVC*.

‎lib/matplotlib/artist.py

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+6-1Lines changed: 6 additions & 1 deletion
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@@ -980,7 +980,12 @@ def update(self, props):
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ret = []
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with cbook._setattr_cm(self, eventson=False):
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for k, v in props.items():
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k = k.lower()
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if k != k.lower():
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cbook.warn_deprecated(
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"3.3", message="Case-insensitive properties were "
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"deprecated in %(since)s and support will be removed "
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"%(removal)s")
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k = k.lower()
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# White list attributes we want to be able to update through
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# art.update, art.set, setp.
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if k == "axes":

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