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# Copyright 2010-2015 MongoDB, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Timezone related utilities for BSON."""
from datetime import (timedelta,
tzinfo)
ZERO = timedelta(0)
class FixedOffset(tzinfo):
"""Fixed offset timezone, in minutes east from UTC.
Implementation based from the Python `standard library documentation
<http://docs.python.org/library/datetime.html#tzinfo-objects>`_.
Defining __getinitargs__ enables pickling / copying.
"""
def __init__(self, offset, name):
if isinstance(offset, timedelta):
self.__offset = offset
else:
self.__offset = timedelta(minutes=offset)
self.__name = name
def __getinitargs__(self):
return self.__offset, self.__name
def utcoffset(self, dt):
return self.__offset
def tzname(self, dt):
return self.__name
def dst(self, dt):
return ZERO
utc = FixedOffset(0, "UTC")
"""Fixed offset timezone representing UTC."""
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