sort out pkg_resources deprecation using importlib.metadata (requires…

… Python 3.8) (#1194)

.github/workflows/tests+artifacts+pypi.yml

@@ -70,9 +70,9 @@ jobs:
         with:
           python-version: 3.9
       - run: |
-          pip install pdoc3
-          pip install -e .
-          pip install -e examples
+          pip install pdoc3 setuptools==58.1.0
+          pip install -e . setuptools==58.1.0
+          pip install -e examples setuptools==58.1.0
           python -We -m pdoc --html PySDM examples/PySDM_examples
           python -We .github/workflows/pdoc_index_workaround.py
       - if: ${{ github.ref == 'refs/heads/main' && matrix.platform == 'ubuntu-latest' }}

PySDM/__init__.py

@@ -22,15 +22,15 @@
 [tests package](https://github.com/open-atmos/PySDM/tree/master/tests).
 """
 
-from pkg_resources import DistributionNotFound, VersionConflict, get_distribution
+from importlib.metadata import PackageNotFoundError, version
 
 from . import environments, exporters, products
 from .builder import Builder
 from .formulae import Formulae
 from .particulator import Particulator
 
 try:
-    __version__ = get_distribution(__name__).version
-except (DistributionNotFound, VersionConflict):
+    __version__ = version(__name__)
+except PackageNotFoundError:
     # package is not installed
     pass

examples/PySDM_examples/__init__.py

@@ -2,10 +2,10 @@
 PySDM_examples package includes common Python modules used in PySDM smoke tests
 and in example notebooks (but the package wheels do not include the notebooks)
 """
-from pkg_resources import DistributionNotFound, VersionConflict, get_distribution
+from importlib.metadata import PackageNotFoundError, version
 
 try:
-    __version__ = get_distribution(__name__).version
-except (DistributionNotFound, VersionConflict):
+    __version__ = version(__name__)
+except PackageNotFoundError:
     # package is not installed
     pass

examples/setup.py

@@ -24,7 +24,7 @@ def get_long_description():
     setup_requires=["setuptools_scm"],
     install_requires=[
         "PySDM",
-        "PyMPDATA",
+        "PyMPDATA" + ">=1.0.15" if CI else "",
         "open-atmos-jupyter-utils",
         "pystrict",
         "matplotlib" + "<3.8.0" if CI else "",  # TODO #1142