Merge pull request #2500 from pybamm-team/issue-2498-entry-points

#2498 try different entry points method

Author: valentinsulzer

CHANGELOG.md

@@ -9,6 +9,7 @@
 
 ## Bug fixes
 
+- Switched from `pkg_resources` to `importlib_metadata` for handling entry points ([#2500](https://github.com/pybamm-team/PyBaMM/pull/2500))
 - Fixed some bugs related to processing `FunctionParameter` to `Interpolant` ([#2494](https://github.com/pybamm-team/PyBaMM/pull/2494))
 
 ## Optimizations

pybamm/parameters/parameter_sets.py

@@ -1,5 +1,5 @@
 import warnings
-import pkg_resources
+import importlib_metadata
 import textwrap
 from collections.abc import Mapping
 
@@ -36,7 +36,9 @@ class ParameterSets(Mapping):
     def __init__(self):
         # Dict of entry points for parameter sets, lazily load entry points as
         self.__all_parameter_sets = dict()
-        for entry_point in pkg_resources.iter_entry_points("pybamm_parameter_sets"):
+        for entry_point in importlib_metadata.entry_points(
+            group="pybamm_parameter_sets"
+        ):
             self.__all_parameter_sets[entry_point.name] = entry_point
 
     def __new__(cls):
@@ -55,7 +57,7 @@ def __load_entry_point__(self, key) -> callable:
         if key not in self.__all_parameter_sets:
             raise KeyError(f"Unknown parameter set: {key}")
         ps = self.__all_parameter_sets[key]
-        if isinstance(ps, pkg_resources.EntryPoint):
+        if isinstance(ps, importlib_metadata.EntryPoint):
             ps = self.__all_parameter_sets[key] = ps.load()
         return ps