Fixed pytz deprecation warnings

apscheduler/triggers/cron/__init__.py

@@ -6,7 +6,8 @@
 from apscheduler.triggers.base import BaseTrigger
 from apscheduler.triggers.cron.fields import (
     BaseField, MonthField, WeekField, DayOfMonthField, DayOfWeekField, DEFAULT_VALUES)
-from apscheduler.util import datetime_ceil, convert_to_datetime, datetime_repr, astimezone
+from apscheduler.util import (
+    datetime_ceil, convert_to_datetime, datetime_repr, astimezone, localize, normalize)
 
 
 class CronTrigger(BaseTrigger):
@@ -143,7 +144,7 @@ def _increment_field_value(self, dateval, fieldnum):
                     i += 1
 
         difference = datetime(**values) - dateval.replace(tzinfo=None)
-        return self.timezone.normalize(dateval + difference), fieldnum
+        return normalize(dateval + difference), fieldnum
 
     def _set_field_value(self, dateval, fieldnum, new_value):
         values = {}
@@ -156,7 +157,7 @@ def _set_field_value(self, dateval, fieldnum, new_value):
                 else:
                     values[field.name] = new_value
 
-        return self.timezone.localize(datetime(**values))
+        return localize(datetime(**values), self.timezone)
 
     def get_next_fire_time(self, previous_fire_time, now):
         if previous_fire_time:

apscheduler/triggers/interval.py

@@ -4,7 +4,9 @@
 from tzlocal import get_localzone
 
 from apscheduler.triggers.base import BaseTrigger
-from apscheduler.util import convert_to_datetime, timedelta_seconds, datetime_repr, astimezone
+from apscheduler.util import (
+    convert_to_datetime, normalize, timedelta_seconds, datetime_repr,
+    astimezone)
 
 
 class IntervalTrigger(BaseTrigger):
@@ -63,7 +65,7 @@ def get_next_fire_time(self, previous_fire_time, now):
             next_fire_time = self._apply_jitter(next_fire_time, self.jitter, now)
 
         if not self.end_date or next_fire_time <= self.end_date:
-            return self.timezone.normalize(next_fire_time)
+            return normalize(next_fire_time)
 
     def __getstate__(self):
         return {

apscheduler/util.py

@@ -34,7 +34,7 @@ def iscoroutinefunction(func):
 __all__ = ('asint', 'asbool', 'astimezone', 'convert_to_datetime', 'datetime_to_utc_timestamp',
            'utc_timestamp_to_datetime', 'timedelta_seconds', 'datetime_ceil', 'get_callable_name',
            'obj_to_ref', 'ref_to_obj', 'maybe_ref', 'repr_escape', 'check_callable_args',
-           'TIMEOUT_MAX')
+           'normalize', 'localize', 'TIMEOUT_MAX')
 
 
 class _Undefined(object):
@@ -162,11 +162,7 @@ def convert_to_datetime(input, tz, arg_name):
     if isinstance(tz, six.string_types):
         tz = timezone(tz)
 
-    try:
-        return tz.localize(datetime_, is_dst=None)
-    except AttributeError:
-        raise TypeError(
-            'Only pytz timezones are supported (need the localize() and normalize() methods)')
+    return localize(datetime_, tz)
 
 
 def datetime_to_utc_timestamp(timeval):
@@ -431,3 +427,14 @@ def iscoroutinefunction_partial(f):
     # The asyncio version of iscoroutinefunction includes testing for @coroutine
     # decorations vs. the inspect version which does not.
     return iscoroutinefunction(f)
+
+
+def normalize(dt):
+    return datetime.fromtimestamp(dt.timestamp(), dt.tzinfo)
+
+
+def localize(dt, tzinfo):
+    if hasattr(tzinfo, 'localize'):
+        return tzinfo.localize(dt)
+
+    return normalize(dt.replace(tzinfo=tzinfo))

docs/versionhistory.rst

@@ -7,8 +7,9 @@ APScheduler, see the :doc:`migration section <migration>`.
 UNRELEASED
 ----------
 
+* No longer enforce pytz time zones (support for others is experimental in the 3.x series)
 * Fixed compatibility with PyMongo 4
-
+* Fixed pytz deprecation warnings
 
 3.8.1
 -----

tests/test_util.py

@@ -148,11 +148,6 @@ def test_text_timezone(self):
         returned = convert_to_datetime('2009-8-1', 'UTC', None)
         assert returned == datetime(2009, 8, 1, tzinfo=pytz.utc)
 
-    def test_bad_timezone(self):
-        exc = pytest.raises(TypeError, convert_to_datetime, '2009-8-1', tzinfo(), None)
-        assert str(exc.value) == ('Only pytz timezones are supported (need the localize() and '
-                                  'normalize() methods)')
-
 
 def test_datetime_to_utc_timestamp(timezone):
     dt = timezone.localize(datetime(2014, 3, 12, 5, 40, 13, 254012))