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# encoding: utf-8 
""" 
Timezone utilities 
 
Just UTC-awareness right now 
""" 
 
#----------------------------------------------------------------------------- 
#  Copyright (C) 2013 The IPython Development Team 
# 
#  Distributed under the terms of the BSD License.  The full license is in 
#  the file COPYING, distributed as part of this software. 
#----------------------------------------------------------------------------- 
 
#----------------------------------------------------------------------------- 
# Imports 
#----------------------------------------------------------------------------- 
 
from datetime import tzinfo, timedelta, datetime 
 
#----------------------------------------------------------------------------- 
# Code 
#----------------------------------------------------------------------------- 
# constant for zero offset 
ZERO = timedelta(0) 
 
class tzUTC(tzinfo): 
    """tzinfo object for UTC (zero offset)""" 
 
    def utcoffset(self, d): 
        return ZERO 
 
    def dst(self, d): 
        return ZERO 
 
UTC = tzUTC() 
 
def utc_aware(unaware): 
    """decorator for adding UTC tzinfo to datetime's utcfoo methods""" 
    def utc_method(*args, **kwargs): 
        dt = unaware(*args, **kwargs) 
        return dt.replace(tzinfo=UTC) 
    return utc_method 
 
utcfromtimestamp = utc_aware(datetime.utcfromtimestamp) 
utcnow = utc_aware(datetime.utcnow)