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Deprecate modelchain.basic_chain #1401

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Merged
merged 4 commits into from
Feb 16, 2022
Merged

Deprecate modelchain.basic_chain #1401

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af31f39
deprecate basic_chain
kandersolar Feb 9, 2022
5c376f0
whatsnew
kandersolar Feb 9, 2022
2bac39b
stickler
kandersolar Feb 9, 2022
bfc43d4
also recommend with_sapm
kandersolar Feb 16, 2022
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5 changes: 5 additions & 0 deletions docs/sphinx/source/whatsnew/v0.9.1.rst
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Expand Up @@ -8,6 +8,11 @@ Breaking changes

Deprecations
~~~~~~~~~~~~
* :py:func:`pvlib.modelchain.basic_chain` is deprecated.
See :py:meth:`pvlib.modelchain.ModelChain.with_pvwatts` for a simplified
:py:class:`~pvlib.modelchain.ModelChain` interface, although note that the
model parameters for :py:func:`~pvlib.modelchain.basic_chain` do not directly
translate. (:pull:`1401`)

Enhancements
~~~~~~~~~~~~
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8 changes: 8 additions & 0 deletions pvlib/modelchain.py
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Expand Up @@ -21,6 +21,8 @@
from pvlib._deprecation import pvlibDeprecationWarning
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
Expand Down Expand Up @@ -62,6 +64,12 @@
)


@deprecated(
since='0.9.1',
name='pvlib.modelchain.basic_chain',
alternative='pvlib.modelchain.ModelChain.with_pvwatts',
addendum='Note that with_pvwatts takes different model parameters.'
)
def basic_chain(times, latitude, longitude,
surface_tilt, surface_azimuth,
module_parameters, temperature_model_parameters,
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31 changes: 17 additions & 14 deletions pvlib/tests/test_modelchain.py
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Expand Up @@ -1799,10 +1799,11 @@ def test_basic_chain_alt_az(sam_data, cec_inverter_parameters,
modules = sam_data['sandiamod']
module_parameters = modules['Canadian_Solar_CS5P_220M___2009_']
temp_model_params = sapm_temperature_cs5p_220m.copy()
dc, ac = modelchain.basic_chain(times, latitude, longitude,
surface_tilt, surface_azimuth,
module_parameters, temp_model_params,
cec_inverter_parameters)
with pytest.warns(pvlibDeprecationWarning, match='with_pvwatts instead'):
dc, ac = modelchain.basic_chain(times, latitude, longitude,
surface_tilt, surface_azimuth,
module_parameters, temp_model_params,
cec_inverter_parameters)

expected = pd.Series(np.array([111.621405, -2.00000000e-02]),
index=times)
Expand All @@ -1821,21 +1822,23 @@ def test_basic_chain_altitude_pressure(sam_data, cec_inverter_parameters,
modules = sam_data['sandiamod']
module_parameters = modules['Canadian_Solar_CS5P_220M___2009_']
temp_model_params = sapm_temperature_cs5p_220m.copy()
dc, ac = modelchain.basic_chain(times, latitude, longitude,
surface_tilt, surface_azimuth,
module_parameters, temp_model_params,
cec_inverter_parameters,
pressure=93194)
with pytest.warns(pvlibDeprecationWarning, match='with_pvwatts instead'):
dc, ac = modelchain.basic_chain(times, latitude, longitude,
surface_tilt, surface_azimuth,
module_parameters, temp_model_params,
cec_inverter_parameters,
pressure=93194)

expected = pd.Series(np.array([113.190045, -2.00000000e-02]),
index=times)
assert_series_equal(ac, expected)

dc, ac = modelchain.basic_chain(times, latitude, longitude,
surface_tilt, surface_azimuth,
module_parameters, temp_model_params,
cec_inverter_parameters,
altitude=altitude)
with pytest.warns(pvlibDeprecationWarning, match='with_pvwatts instead'):
dc, ac = modelchain.basic_chain(times, latitude, longitude,
surface_tilt, surface_azimuth,
module_parameters, temp_model_params,
cec_inverter_parameters,
altitude=altitude)

expected = pd.Series(np.array([113.189814, -2.00000000e-02]),
index=times)
Expand Down