use Python's native timezone support so we can remove the dependenc…

…y on `Babel`

schwarz/column_alchemy/tests/utc_datetime_column_test.py

@@ -4,10 +4,9 @@
 # the GPLv3 or (at your option) any later version.
 # SPDX-License-Identifier: MIT or GPL-3.0-or-later
 
-from datetime import datetime as DateTime
+from datetime import datetime as DateTime, timedelta as TimeDelta, timezone
 
 import pytest
-from babel.util import FixedOffsetTimezone, UTC
 from sqlalchemy import Column
 from sqlalchemy.exc import StatementError
 
@@ -23,13 +22,14 @@ def ctx(db_ctx):
 
 
 def test_utc_datetime_can_store_datetime_with_timezone(ctx):
-    dt = DateTime(2013, 5, 25, 9, 53, 24, tzinfo=FixedOffsetTimezone(-90))
+    tz = timezone(TimeDelta(hours=-1, minutes=-30))
+    dt = DateTime(2013, 5, 25, 9, 53, 24, tzinfo=tz)
     with ctx.connection.begin():
         inserted_id = ctx.insert_data(ctx.table, [{'timestamp': dt}])
 
     dt_from_db = ctx.fetch_value(ctx.table, id=inserted_id)
     assert dt_from_db == dt
-    assert dt_from_db.tzinfo == UTC
+    assert dt_from_db.tzinfo == timezone.utc
 
 
 def test_utc_datetime_raises_exception_for_naive_datetime(ctx):

schwarz/column_alchemy/utc_datetime_column.py

@@ -4,9 +4,8 @@
 # the GPLv3 or (at your option) any later version.
 # SPDX-License-Identifier: MIT or GPL-3.0-or-later
 
-from datetime import datetime
+from datetime import datetime, timezone
 
-from babel.dates import UTC
 from sqlalchemy.types import DateTime, TypeDecorator
 
 
@@ -33,7 +32,7 @@ def process_bind_param(self, value, dialect):
             # since Python 3.6 ".astimetzone()" also works on naive datetime
             # instances so we have to check this separately.
             raise ValueError('naive datetime instance passed: %r' % value)
-        utc_dt = value.astimezone(UTC)
+        utc_dt = value.astimezone(timezone.utc)
         if self._strip_tz:
             return utc_dt.replace(tzinfo=None)
         return utc_dt
@@ -43,6 +42,6 @@ def process_result_value(self, value, dialect):
             return None
         return datetime(value.year, value.month, value.day,
                         value.hour, value.minute, value.second,
-                        value.microsecond, tzinfo=UTC)
+                        value.microsecond, tzinfo=timezone.utc)
 # -----------------------------------------------------------------------------
 

setup.cfg

@@ -18,7 +18,6 @@ zip_safe = false
 include_package_data = true
 
 install_requires =
-    Babel
     # >= 1.2.3: Enum(…, values_callable=…)
     SQLAlchemy >= 1.2.3