Migrate package resource/metadata access to stdlib importlib APIs

[Copilot]

This PR replaces legacy/backport package resource and metadata access with stdlib importlib.resources and importlib.metadata. It removes importlib_resources as a runtime packaging dependency and aligns codepaths with supported Python versions.

• Resource access migration (importlib_resources → importlib.resources)

  • Updated Python modules, tutorials, and tests that load bundled data via files(...) to use stdlib imports.
  • No behavioral change intended in path resolution semantics; only import source changed.

• Package metadata access via stdlib

  • Added openpiv.__version__ sourced from importlib.metadata.version("OpenPIV") in openpiv/__init__.py.
  • Standardizes version lookup on installed distribution metadata rather than setuptools-era patterns.

• Dependency and packaging cleanup

  • Removed importlib_resources from:
    • pyproject.toml
    • setup.py
    • recipe/meta.yaml
  • Regenerated poetry.lock to reflect dependency graph changes.

• Focused metadata coverage

  • Added a targeted test asserting openpiv.__version__ matches distribution metadata.

from importlib.resources import files
from importlib.metadata import version

data_dir = files("openpiv.data")
pkg_version = version("OpenPIV")

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[Copilot]

Pull request overview

This PR migrates OpenPIV’s package resource and metadata access from the importlib_resources backport to the Python stdlib importlib.resources / importlib.metadata, and removes importlib_resources as a runtime dependency.

Changes:

• Replaced from importlib_resources import files with from importlib.resources import files across core modules, tutorials, and tests.
• Added openpiv.__version__ via importlib.metadata.version("OpenPIV") plus a matching metadata test.
• Removed importlib_resources from packaging/dependency definitions and updated poetry.lock.

Reviewed changes

Copilot reviewed 17 out of 18 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
setup.py	Drops importlib_resources from install_requires.
recipe/meta.yaml	Drops importlib_resources from conda run requirements.
pyproject.toml	Drops importlib_resources from Poetry dependencies.
poetry.lock	Regenerated lockfile reflecting dependency removal and Poetry version.
openpiv/init.py	Introduces __version__ sourced from distribution metadata.
openpiv/piv.py	Switches resource API import to stdlib.
openpiv/settings.py	Switches resource API import to stdlib.
openpiv/tutorials/tutorial1.py	Switches resource API import to stdlib.
openpiv/tutorials/tutorial2.py	Switches resource API import to stdlib.
openpiv/tutorials/windef_tutorial.py	Switches resource API import to stdlib.
openpiv/tutorials/masking_tutorial.py	Switches resource API import to stdlib.
openpiv/test/test_process.py	Switches resource API import to stdlib.
openpiv/test/test_piv.py	Switches resource API import to stdlib.
openpiv/test/test_validation.py	Switches resource API import to stdlib.
openpiv/test/test_windef.py	Switches resource API import to stdlib.
openpiv/test/test_windef_coverage.py	Switches resource API import to stdlib.
openpiv/test/test_windef_detailed.py	Switches resource API import to stdlib.
openpiv/test/test_package_metadata.py	Adds test asserting openpiv.__version__ matches distribution metadata.

[Copilot]

__version__ = version("OpenPIV") runs at import time and will raise importlib.metadata.PackageNotFoundError when OpenPIV is imported from a source checkout (or other contexts where distribution metadata isn’t installed). That would break import openpiv as well as tutorials/tests that import openpiv indirectly. Consider wrapping the metadata lookup in a try/except and providing a reasonable fallback (e.g., a hardcoded dev version or reading from a local version constant) so the package remains importable without installed metadata.

Suggested change

	from importlib.metadata import version
	__version__ = version("OpenPIV")
	from importlib.metadata import PackageNotFoundError, version
	try:
	__version__ = version("OpenPIV")
	except PackageNotFoundError:
	# Fallback when distribution metadata is not available (e.g., source checkout)
	__version__ = "0.25.3"

[Copilot]

After removing importlib_resources, the codebase now relies on stdlib importlib.resources.files, which is not available on Python 3.7/3.8. This recipe still advertises python >=3.7 (in both build/run requirements), so conda builds or installs on those versions would fail at runtime. Please bump the recipe’s Python minimum to match the project’s supported versions (>=3.10 per pyproject), or alternatively keep a conditional importlib_resources dependency for older Pythons.

[Copilot]

With importlib_resources removed from install_requires, installing via setup.py on older Python versions (e.g., 3.7/3.8) will now succeed but fail at import time because stdlib importlib.resources.files isn’t available there. setup.py currently doesn’t set python_requires, so pip won’t be prevented from installing on unsupported versions. Please add an appropriate python_requires constraint (e.g., >=3.10 to match pyproject) or reintroduce a conditional backport dependency for older Pythons.

Suggested change

	],
	],
	python_requires=">=3.10",