Fix unit tests (#119)

## Context
PR #115 has set checks on the command arguments so that positional
arguments will be rejected. One of the unit test wasn't using the right
`$NEURODAMUS_PYTHON/init.py` during the PR and thus failing now.
And towards Python 3.12, `pkg_resources` will be deprecated and needs to
be replaced.

## Scope
This PR fixes the unit test in `test_cli_opts.py` by correcting the
argument to be "--save=PATH".
And it replaces `pkg_resources.get_distribution` with
`importlib.metadata.version`

## Testing
Existing tests

## Review
* [x] PR description is complete
* [x] Coding style (imports, function length, New functions, classes or
files) are good
* [x] Unit/Scientific test added
* [ ] Updated Readme, in-code, developer documentation

neurodamus/__init__.py

@@ -9,9 +9,9 @@
     `node`, `cell_distributor`, etc; and still depends on several low-level HOC files at runtime.
 """
 from __future__ import absolute_import
-import pkg_resources
+import importlib.metadata
 try:
-    __version__ = pkg_resources.get_distribution(__name__).version
+    __version__ = importlib.metadata.version(__name__)
 except Exception:
     __version__ = 'devel'
 

tests/integration-e2e/test_cli_opts.py

@@ -35,7 +35,7 @@ def test_save_restore_cli():
             checkpoint_dir = test_folder_path / "output-save" / "checkpoint"
 
             command = ["neurodamus", test_folder_path / CONFIG_FILE_MINI,
-                        "--" + action, checkpoint_dir]
+                        "--" + action + "=" + str(checkpoint_dir)]
             # Save-Restore raises exception when using NEURON
             if simulator == "NEURON":
                 with pytest.raises(subprocess.CalledProcessError):