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_tz.py
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"""
Timezone utilities
Just UTC-awareness right now
"""
# Copyright (c) Jupyter Development Team.
# Distributed under the terms of the Modified BSD License.
from datetime import datetime, timedelta, tzinfo
# 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)
def isoformat(dt):
"""Return iso-formatted timestamp
Like .isoformat(), but uses Z for UTC instead of +00:00
"""
return dt.isoformat().replace("+00:00", "Z")