Fixes parsing of string with partial offset

Author: sdispater

pendulum/pendulum.py

@@ -203,7 +203,11 @@ def parse(cls, time=None, tz=pytz.UTC):
             raise PendulumException('Invalid time string "{}"'.format(time))
 
         if dt.tzinfo:
-            tz = int(dt.tzinfo.utcoffset(None).total_seconds() / 3600)
+            offset = dt.tzinfo.utcoffset(dt)
+            if not offset:
+                offset = datetime.timedelta()
+
+            tz = offset.total_seconds() / 3600
 
         return cls(
             dt.year, dt.month, dt.day,

tests/pendulum_tests/test_construct.py

@@ -41,6 +41,12 @@ def test_parse_with_offset_in_string(self):
         self.assertIsNone(p.timezone_name)
         self.assertEqual(-18000, p.offset)
 
+    def test_parse_with_partial_offset_in_string(self):
+        p = Pendulum.parse('2016-04-15T18:21:08.7454873-00:30')
+        self.assertPendulum(p, 2016, 4, 15, 18, 21, 8)
+        self.assertIsNone(p.timezone_name)
+        self.assertEqual(-1800, p.offset)
+
     def test_setting_timezone(self):
         timezone = 'Europe/London'
         dtz = pytz.timezone(timezone)