Issue 350 plugins can import most commonly used flex measures classes from a central place

documentation/changelog.rst

@@ -20,6 +20,7 @@ Bugfixes
 
 Infrastructure / Support
 ----------------------
+* Plugins can import common FlexMeasures classes (like ``Asset`` and ``Sensor``) from a central place, using ``from flexmeasures import Asset, Sensor`` [see `PR #354 <http://www.github.com/FlexMeasures/flexmeasures/pull/354>`_]
 
 
 v0.8.0 | January 24, 2022

flexmeasures/__init__.py

@@ -1,5 +1,14 @@
 from importlib_metadata import version, PackageNotFoundError
 
+from flexmeasures.data.models.annotations import Annotation  # noqa F401
+from flexmeasures.data.models.user import Account, AccountRole, User  # noqa F401
+from flexmeasures.data.models.data_sources import DataSource as Source  # noqa F401
+from flexmeasures.data.models.generic_assets import (  # noqa F401
+    GenericAsset as Asset,
+    GenericAssetType as AssetType,
+)
+from flexmeasures.data.models.time_series import Sensor  # noqa F401
+
 
 __version__ = "Unknown"
 

flexmeasures/config/tests/test_package.py

@@ -0,0 +1,19 @@
+import pytest
+
+
+@pytest.mark.parametrize(
+    "class_name",
+    [
+        "Account",
+        "AccountRole",
+        "Asset",
+        "Sensor",
+        "Source",
+        "User",
+    ],
+)
+def test_class_imports(class_name: str):
+    """Make sure that plugins can import these classes as `from flexmeasures import <class_name>`."""
+    import flexmeasures as fm
+
+    assert hasattr(fm, class_name)