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Deprecate old names & attributes in RegionProperties#7778

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stefanv merged 2 commits intoscikit-image:mainfrom
lagru:deprecate-old-regionprops
May 2, 2025
Merged

Deprecate old names & attributes in RegionProperties#7778
stefanv merged 2 commits intoscikit-image:mainfrom
lagru:deprecate-old-regionprops

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@lagru lagru commented Apr 22, 2025 •
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Description

Closes #7732.

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For maintainers and optionally contributors, please refer to the instructions on how to document this PR for the release notes.

Officially deprecate old properties in `skimage.measure.regionprops` and
related functions. While we removed the documentation for these some time
ago, they where still accessible as keys (via `__get_item__`) or attributes.
Going forward, using deprecated keys or attributes, will emit an
appropriate warning.

@lagru lagru added 🔽 Deprecation Involves deprecation 📜 type: API Involves API change(s) 🥾 Path to skimage2 A step towards the new "API 2.0" labels Apr 22, 2025
@lagru lagru mentioned this pull request Apr 22, 2025
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lagru
lagru commented Apr 22, 2025
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skimage/measure/_regionprops.py
Comment on lines +426 to +427
# Fallback to default behavior, potentially raising an attribute error
return self.__getattribute__(attr)
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@lagru lagru Apr 22, 2025

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{type(self)} would print <class 'skimage.measure._regionprops.RegionProperties'> here which isn't really what we want.

Aside: I noticed that something magically appends

Did you mean '...'

to the previous error message. Apparently only for properties. E.g.

class A:
    @property
    def a(self):
        return 3
    
    def __getattr__(self, item):
        raise AttributeError("not found")
    
A().A
[...] line 7, in __getattr__
    raise AttributeError("not found")
AttributeError: not found. Did you mean: 'a'

If that is official Python behavior I can't find a reference to this behavior? Am I crazy? 🤯

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@stefanv stefanv Apr 29, 2025

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What version of Python are you seeing this on? I don't see it with 3.13.

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@lagru lagru Apr 30, 2025

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Weird, I see it on 3.13.3 inside a simple repl:

Python 3.13.3 (main, Apr  9 2025, 07:44:25) [GCC 14.2.1 20250207] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> class A:
...     @property
...     def a(self):
...         return 3
...     
...     def __getattr__(self, item):
...         raise AttributeError("not found")
...     
... A().A
... 
Traceback (most recent call last):
  File "<python-input-0>", line 9, in <module>
    A().A
  File "<python-input-0>", line 7, in __getattr__
    raise AttributeError("not found")
AttributeError: not found. Did you mean: 'a'?

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@mkcor mkcor May 2, 2025

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Haha, I have the same (i.e., AttributeError: not found. Did you mean: 'a'?) in Python 3.11.3... when I run spin python but not when I run spin ipython (I only get AttributeError: not found). 😅

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@stefanv stefanv May 2, 2025

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Looks like Python 3.11 and 3.12 behavior.

lagru
lagru commented Apr 28, 2025
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skimage/measure/tests/test_regionprops.py Outdated
Comment on lines +1577 to +1578
# lower case names in PROPS are still accessible as attributes
# Make sure those emit an appropriate warning
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@lagru lagru Apr 28, 2025

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To do: clarify this comment.

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@lagru lagru Apr 29, 2025

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@stefanv, let me know if cabaf1a resolves this.

Don't really know why only lower-case properties were made accessible as attributes. Maybe that was introduced after the switch from camel case to snake case.

mkcor
mkcor approved these changes May 2, 2025
View reviewed changes
skimage/measure/_regionprops.py
Comment on lines +426 to +427
# Fallback to default behavior, potentially raising an attribute error
return self.__getattribute__(attr)
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@mkcor mkcor May 2, 2025

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Haha, I have the same (i.e., AttributeError: not found. Did you mean: 'a'?) in Python 3.11.3... when I run spin python but not when I run spin ipython (I only get AttributeError: not found). 😅

@stefanv stefanv merged commit 7ac3334 into scikit-image:main May 2, 2025
22 of 23 checks passed
@stefanv stefanv added this to the 0.26 milestone May 2, 2025
@lagru lagru deleted the deprecate-old-regionprops branch May 13, 2025 13:43
matthew-brett added a commit to matthew-brett/scikit-image that referenced this pull request Jul 7, 2025
@matthew-brett
Merge remote-tracking branch 'origin/main' into refactor-fundamental
91f2233 
* origin/main:
  Deprecate estimate method in favor of class constructor (scikit-image#7771)
  Temporary fix for Visual Studio & Clang incompatibility in Windows image (scikit-image#7835)
  Address deprecations in Pillow 11.3 (scikit-image#7828)
  Remove unused & obsolete `legacy_datasets`, `legacy_registry` vars (scikit-image#7677)
  Draft migration guide for skimage2 (scikit-image#7785)
  Do not report failure in wheels sub-recipe (scikit-image#7806)
  Use consistent wording in property description. (scikit-image#7804)
  Add intensity_median to regionprops (scikit-image#7745)
  CI: Update pypa/gh-action-pypi-publish to v1.12.4 for attestations on PyPI (scikit-image#7793)
  Document output dtype for transform.resize. (scikit-image#7792)
  Use `cibuildwheel` to build WASM/Pyodide wheels for `scikit-image`, push nightlies to Anaconda.org (scikit-image#7440)
  DOC: Include missing gain parameter in adjust_gamma equation (scikit-image#7763)
  Temporarily pin to `pyodide-build==0.30.0`, and ensure that the correct xbuildenvs are used (scikit-image#7788)
  Deprecate old names & attributes in RegionProperties (scikit-image#7778)
  Pin JasonEtco/create-an-issue action to SHA for v2.9.2 (scikit-image#7787)
  Make doctest-plus work with spin (scikit-image#7786)
  Report failures on main via issue (scikit-image#7752)
  Use `workers` instead of alternate parameter names (scikit-image#7302)
  Fix f-string in otsu plot (scikit-image#7780)
  Further document use of regionprops function and fix terms. (scikit-image#7518)
matthew-brett added a commit to matthew-brett/scikit-image that referenced this pull request Jul 14, 2025
@matthew-brett
Merge remote-tracking branch 'origin/main' into doc-some-params
70b9faa 
* origin/main: (31 commits)
  Update import convention in certain gallery examples (scikit-image#7764)
  Refactor fundamental matrix scaling (scikit-image#7767)
  Add unit test for cval unequal to zero
  Forward  in _generic_edge_filter
  Remove superfluous mask argument from _generic_edge_filter
  Only report failure on main branch once
  Deprecate estimate method in favor of class constructor (scikit-image#7771)
  Temporary fix for Visual Studio & Clang incompatibility in Windows image (scikit-image#7835)
  Address deprecations in Pillow 11.3 (scikit-image#7828)
  Remove unused & obsolete `legacy_datasets`, `legacy_registry` vars (scikit-image#7677)
  Draft migration guide for skimage2 (scikit-image#7785)
  Do not report failure in wheels sub-recipe (scikit-image#7806)
  Use consistent wording in property description. (scikit-image#7804)
  Add intensity_median to regionprops (scikit-image#7745)
  CI: Update pypa/gh-action-pypi-publish to v1.12.4 for attestations on PyPI (scikit-image#7793)
  Document output dtype for transform.resize. (scikit-image#7792)
  Use `cibuildwheel` to build WASM/Pyodide wheels for `scikit-image`, push nightlies to Anaconda.org (scikit-image#7440)
  DOC: Include missing gain parameter in adjust_gamma equation (scikit-image#7763)
  Temporarily pin to `pyodide-build==0.30.0`, and ensure that the correct xbuildenvs are used (scikit-image#7788)
  Deprecate old names & attributes in RegionProperties (scikit-image#7778)
  ...
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@stefanv stefanv stefanv approved these changes

@mkcor mkcor mkcor approved these changes

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🔽 Deprecation Involves deprecation 🥾 Path to skimage2 A step towards the new "API 2.0" 📜 type: API Involves API change(s)

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Deprecate old regionprop names

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@lagru @stefanv @mkcor