Commits

Michael Manfre committed bc96f77

Fixed #10 -- Added missing sqlserver_ado.timzone package.

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Files changed (1)

sqlserver_ado/timezone.py

+"""
+TZ helper functions backported from Django 1.4. This module should only 
+get loaded if django.utils.timezone doesn't exist.
+"""
+
+
+try:
+    import pytz
+except ImportError:
+    pytz = None
+
+
+__all__ = [
+    'utc', 'is_aware'
+]
+
+# UTC and local time zones
+
+ZERO = timedelta(0)
+
+class UTC(tzinfo):
+    """
+    UTC implementation taken from Python's docs.
+
+    Used only when pytz isn't available.
+    """
+
+    def __repr__(self):
+        return "<UTC>"
+
+    def utcoffset(self, dt):
+        return ZERO
+
+    def tzname(self, dt):
+        return "UTC"
+
+    def dst(self, dt):
+        return ZERO
+
+utc = pytz.utc if pytz else UTC()
+"""UTC time zone as a tzinfo instance."""
+
+
+def is_aware(value):
+    """
+    Determines if a given datetime.datetime is aware.
+
+    The logic is described in Python's docs:
+    http://docs.python.org/library/datetime.html#datetime.tzinfo
+    """
+    return value.tzinfo is not None and value.tzinfo.utcoffset(value) is not None
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