Deprecate modelchain.get_orientation (#2495)

* enhance tests to check error message

* linting, whatsnew

* deprecate get_orientation

* remove test

* Update modelchain.rst

* Update v0.13.1.rst

* Update v0.13.1.rst

* reinstate test

* update removal schedule

* reinstate function in docs

* revert to default deprecation message

* remove removal date from whatsnew

* test deprecationwarning

* linter blank line

* Update docs/sphinx/source/whatsnew/v0.13.1.rst

---------

Co-authored-by: Kevin Anderson <kevin.anderso@gmail.com>

Author: RDaxini

docs/sphinx/source/whatsnew/v0.13.1.rst

@@ -10,6 +10,7 @@ Breaking Changes
 
 Deprecations
 ~~~~~~~~~~~~
+* Deprecate :py:func:`~pvlib.modelchain.get_orientation`. (:pull:`2495`)
 * Rename parameter name ``aparent_azimuth`` to ``solar_azimuth`` in :py:func:`~pvlib.tracking.singleaxis`.
   (:issue:`2479`, :pull:`2480`)
 

pvlib/modelchain.py

@@ -18,6 +18,8 @@
 from pvlib.pvsystem import _DC_MODEL_PARAMS
 from pvlib.tools import _build_kwargs
 
+from pvlib._deprecation import deprecated
+
 # keys that are used to detect input data and assign data to appropriate
 # ModelChain attribute
 # for ModelChain.weather
@@ -59,6 +61,13 @@
 )
 
 
+@deprecated(
+    since="0.13.1",
+    removal="",
+    name="pvlib.modelchain.get_orientation",
+    alternative=None,
+    addendum=None,
+)
 def get_orientation(strategy, **kwargs):
     """
     Determine a PV system's surface tilt and surface azimuth

tests/test_modelchain.py

@@ -8,6 +8,8 @@
 from pvlib.pvsystem import PVSystem
 from pvlib.location import Location
 
+from pvlib._deprecation import pvlibDeprecationWarning
+
 from .conftest import assert_series_equal, assert_frame_equal
 import pytest
 
@@ -1786,8 +1788,9 @@ def test_invalid_models(model, sapm_dc_snl_ac_system, location):
 
 
 def test_bad_get_orientation():
-    with pytest.raises(ValueError):
-        modelchain.get_orientation('bad value')
+    with pytest.warns(pvlibDeprecationWarning, match='will be removed soon'):
+        with pytest.raises(ValueError):
+            modelchain.get_orientation('bad value')
 
 
 # tests for PVSystem with multiple Arrays