/usr/lib/python3/dist-packages/aniso8601/timezone.py is in python3-aniso8601 2.0.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 | # -*- coding: utf-8 -*-
# Copyright (c) 2016, Brandon Nielsen
# All rights reserved.
#
# This software may be modified and distributed under the terms
# of the BSD license. See the LICENSE file for details.
import datetime
def parse_timezone(tzstr):
#tzstr can be Z, ±hh:mm, ±hhmm, ±hh
if len(tzstr) == 1 and tzstr == 'Z':
#Z -> UTC
return UTCOffset(name='UTC', minutes=0)
elif len(tzstr) == 6:
#±hh:mm
tzhour = int(tzstr[1:3])
tzminute = int(tzstr[4:6])
elif len(tzstr) == 5:
#±hhmm
tzhour = int(tzstr[1:3])
tzminute = int(tzstr[3:5])
elif len(tzstr) == 3:
#±hh
tzhour = int(tzstr[1:3])
tzminute = 0
else:
raise ValueError('String is not a valid ISO 8601 time offset.')
if tzstr[0] == '+':
return UTCOffset(name=tzstr, minutes=(tzhour * 60 + tzminute))
elif tzhour == 0 and tzminute == 0:
raise ValueError('Negative ISO 8601 time offset cannot be 0.')
return UTCOffset(name=tzstr, minutes=-(tzhour * 60 + tzminute))
class UTCOffset(datetime.tzinfo):
def __init__(self, name=None, minutes=None):
#We build an offset in this manner since the
#tzinfo class must have an init that can
#"method that can be called with no arguments"
self._name = name
if minutes is not None:
self._utcdelta = datetime.timedelta(minutes=minutes)
else:
self._utcdelta = None
def __repr__(self):
if self._utcdelta >= datetime.timedelta(hours=0):
return '+{0} UTC'.format(self._utcdelta)
#From the docs:
#String representations of timedelta objects are normalized
#similarly to their internal representation. This leads to
#somewhat unusual results for negative timedeltas.
#Clean this up for printing purposes
correcteddays = abs(self._utcdelta.days + 1) #Negative deltas start at -1 day
deltaseconds = (24 * 60 * 60) - self._utcdelta.seconds #Negative deltas have a positive seconds
days, remainder = divmod(deltaseconds, 24 * 60 * 60) #(24 hours / day) * (60 minutes / hour) * (60 seconds / hour)
hours, remainder = divmod(remainder, 1 * 60 * 60) #(1 hour) * (60 minutes / hour) * (60 seconds / hour)
minutes, seconds = divmod(remainder, 1 * 60) #(1 minute) * (60 seconds / minute)
#Add any remaining days to the correctedDays count
correcteddays += days
if correcteddays == 0:
return '-{0}:{1:02}:{2:02} UTC'.format(hours, minutes, seconds)
elif correcteddays == 1:
return '-1 day, {0}:{1:02}:{2:02} UTC'.format(hours, minutes, seconds)
return '-{0} days, {1}:{2:02}:{3:02} UTC'.format(correcteddays, hours, minutes, seconds)
def utcoffset(self, dt):
return self._utcdelta
def tzname(self, dt):
return self._name
def dst(self, dt):
#ISO 8601 specifies offsets should be different if DST is required,
#instead of allowing for a DST to be specified
# https://docs.python.org/2/library/datetime.html#datetime.tzinfo.dst
return datetime.timedelta(0)
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