Remove remaining direct dependency on pytz

Author: markcampanelli

ci/requirements-py3.10.yml

@@ -19,7 +19,7 @@ dependencies:
     - pytest-rerunfailures
     - conda-forge::pytest-remotedata  # version in default channel is old
     - python=3.10
-    - pytz
+    # - pytz
     - requests
     - scipy >= 1.6.0
     - statsmodels

ci/requirements-py3.11.yml

@@ -19,7 +19,7 @@ dependencies:
     - pytest-rerunfailures
     - conda-forge::pytest-remotedata  # version in default channel is old
     - python=3.11
-    - pytz
+    # - pytz
     - requests
     - scipy >= 1.6.0
     - statsmodels

ci/requirements-py3.12.yml

@@ -19,7 +19,7 @@ dependencies:
     - pytest-rerunfailures
     - conda-forge::pytest-remotedata  # version in default channel is old
     - python=3.12
-    - pytz
+    # - pytz
     - requests
     - scipy >= 1.6.0
     - statsmodels

ci/requirements-py3.9-min.yml

@@ -9,7 +9,7 @@ dependencies:
     - pytest-mock
     - pytest-timeout
     - python=3.9
-    - pytz
+    # - pytz
     - requests
     - pip:
         - h5py==3.0.0

ci/requirements-py3.9.yml

@@ -19,7 +19,7 @@ dependencies:
     - pytest-rerunfailures
     - conda-forge::pytest-remotedata  # version in default channel is old
     - python=3.9
-    - pytz
+    # - pytz
     - requests
     - scipy >= 1.6.0
     - statsmodels

docs/tutorials/solarposition.ipynb

@@ -10,10 +10,10 @@
 
 import h5py
 import pandas as pd
-import pytz
+# import pytz
 
 from pvlib import atmosphere, clearsky, irradiance, solarposition
-from pvlib._deprecation import warn_deprecated
+# from pvlib._deprecation import warn_deprecated
 from pvlib.tools import _degrees_to_index
 
 
@@ -90,14 +90,14 @@ def __init__(
             self.tz = tz
         elif isinstance(tz, datetime.timezone):
             self.tz = ZoneInfo(str(tz))
-        elif isinstance(tz, pytz.BaseTzInfo):
-            warn_deprecated(
-                "0.11.3",
-                message='pytz timezones are deprecated',
-                alternative='use zoneinfo.ZoneInfo from the standard library',
-                obj_type='function argument type',
-            )
-            self.tz = ZoneInfo(tz.zone)
+        # elif isinstance(tz, pytz.BaseTzInfo):
+        #     warn_deprecated(
+        #         "0.11.3",
+        #         message='pytz-based timezones are deprecated for locations',
+        #         alternative='use zoneinfo.ZoneInfo from the standard library',
+        #         obj_type='function argument type',
+        #     )
+        #     self.tz = ZoneInfo(tz.zone)
         else:
             raise TypeError(f'Invalid tz specification: {tz}')
 

pvlib/location.py

@@ -8,7 +8,7 @@
 from .conftest import assert_frame_equal, assert_index_equal
 
 import pytest
-import pytz
+# import pytz
 
 import pvlib
 from pvlib import location
@@ -26,10 +26,17 @@ def test_location_all():
     Location(32.2, -111, 'US/Arizona', 700, 'Tucson')
 
 
-@pytest.mark.parametrize('tz', [
-    pytz.timezone('US/Arizona'), ZoneInfo('US/Arizona'), 'America/Phoenix',
-    -7, -7.0, datetime.timezone.utc
-])
+@pytest.mark.parametrize(
+    'tz',
+    [
+        # pytz.timezone('US/Arizona'),
+        ZoneInfo('US/Arizona'),
+        'America/Phoenix',
+        -7,
+        -7.0,
+        datetime.timezone.utc,
+    ]
+)
 def test_location_tz(tz):
     Location(32.2, -111, tz)
 

pvlib/tests/test_location.py

@@ -1,22 +1,21 @@
 import calendar
 import datetime
 import warnings
+import zoneinfo
 
 import numpy as np
-import pandas as pd
-
-from .conftest import assert_frame_equal, assert_series_equal
 from numpy.testing import assert_allclose
+import pandas as pd
 import pytest
-import pytz
 
-from pvlib.location import Location
 from pvlib import solarposition, spa
-
-from .conftest import (
-    requires_ephem, requires_spa_c, requires_numba, requires_pandas_2_0
+from pvlib.location import Location
+from pvlib.tests.conftest import (
+    assert_frame_equal, assert_series_equal, requires_ephem, requires_spa_c,
+    requires_numba, requires_pandas_2_0,
 )
 
+
 # setup times and locations to be tested.
 times = pd.date_range(start=datetime.datetime(2014, 6, 24),
                       end=datetime.datetime(2014, 6, 26), freq='15min')
@@ -348,13 +347,12 @@ def test_calc_time():
     # validation from USNO solar position calculator online
 
     epoch = datetime.datetime(1970, 1, 1)
-    epoch_dt = pytz.utc.localize(epoch)
+    epoch_dt = epoch.replace(tzinfo=zoneinfo.ZoneInfo("UTC"))
 
     loc = tus
-    actual_time = pytz.timezone(loc.tz).localize(
-        datetime.datetime(2014, 10, 10, 8, 30))
-    lb = pytz.timezone(loc.tz).localize(datetime.datetime(2014, 10, 10, tol))
-    ub = pytz.timezone(loc.tz).localize(datetime.datetime(2014, 10, 10, 10))
+    actual_time = datetime.datetime(2014, 10, 10, 8, 30, tzinfo=loc.tz)
+    lb = datetime.datetime(2014, 10, 10, tol, tzinfo=loc.tz)
+    ub = datetime.datetime(2014, 10, 10, 10, tzinfo=loc.tz)
     alt = solarposition.calc_time(lb, ub, loc.latitude, loc.longitude,
                                   'alt', math.radians(24.7))
     az = solarposition.calc_time(lb, ub, loc.latitude, loc.longitude,
@@ -724,9 +722,12 @@ def test_hour_angle_with_tricky_timezones():
         '2014-09-07 02:00:00',
     ]).tz_localize('America/Santiago', nonexistent='shift_forward')
 
-    with pytest.raises(pytz.exceptions.NonExistentTimeError):
+    # should raise `pytz.exceptions.NonExistentTimeError`
+    with pytest.raises(Exception, match="2014-09-07 00:00:00") as exc_info:
         times.normalize()
 
+    assert exc_info.type.__name__ == "NonExistentTimeError"
+
     # should not raise `pytz.exceptions.NonExistentTimeError`
     solarposition.hour_angle(times, longitude, eot)
 
@@ -738,9 +739,15 @@ def test_hour_angle_with_tricky_timezones():
         '2014-11-02 02:00:00',
     ]).tz_localize('America/Havana', ambiguous=[True, True, False, False])
 
-    with pytest.raises(pytz.exceptions.AmbiguousTimeError):
+    # should raise `pytz.exceptions.AmbiguousTimeError`
+    with pytest.raises(
+        Exception,
+        match="Cannot infer dst time from 2014-11-02 00:00:00",
+    ) as exc_info:
         solarposition.hour_angle(times, longitude, eot)
 
+    assert exc_info.type.__name__ == "AmbiguousTimeError"
+
 
 def test_sun_rise_set_transit_geometric(expected_rise_set_spa, golden_mst):
     """Test geometric calculations for sunrise, sunset, and transit times"""

pvlib/tests/test_solarposition.py

@@ -14,7 +14,7 @@ dependencies = [
     'h5py >=3.12, <4',
     'numpy >=1.19.3, <3',
     'pandas >=1.3.0, <3',
-    'pytz',
+    # 'pytz',
     'requests >=2, <3',
     'scipy >=1.6.0, <2',
 ]