/usr/lib/python3/dist-packages/subunit/iso8601.py is in python3-subunit 1.2.0-0ubuntu2.
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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 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 | # Copyright (c) 2007 Michael Twomey
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
"""ISO 8601 date time string parsing
Basic usage:
>>> import iso8601
>>> iso8601.parse_date("2007-01-25T12:00:00Z")
datetime.datetime(2007, 1, 25, 12, 0, tzinfo=<iso8601.iso8601.Utc ...>)
>>>
"""
from datetime import datetime, timedelta, tzinfo
import re
import sys
__all__ = ["parse_date", "ParseError"]
# Adapted from http://delete.me.uk/2005/03/iso8601.html
ISO8601_REGEX_PATTERN = (r"(?P<year>[0-9]{4})(-(?P<month>[0-9]{1,2})(-(?P<day>[0-9]{1,2})"
r"((?P<separator>.)(?P<hour>[0-9]{2}):(?P<minute>[0-9]{2})(:(?P<second>[0-9]{2})(\.(?P<fraction>[0-9]+))?)?"
r"(?P<timezone>Z|(([-+])([0-9]{2}):([0-9]{2})))?)?)?)?"
)
TIMEZONE_REGEX_PATTERN = "(?P<prefix>[+-])(?P<hours>[0-9]{2}).(?P<minutes>[0-9]{2})"
ISO8601_REGEX = re.compile(ISO8601_REGEX_PATTERN.encode('utf8'))
TIMEZONE_REGEX = re.compile(TIMEZONE_REGEX_PATTERN.encode('utf8'))
zulu = "Z".encode('latin-1')
minus = "-".encode('latin-1')
if sys.version_info < (3, 0):
bytes = str
class ParseError(Exception):
"""Raised when there is a problem parsing a date string"""
# Yoinked from python docs
ZERO = timedelta(0)
class Utc(tzinfo):
"""UTC
"""
def utcoffset(self, dt):
return ZERO
def tzname(self, dt):
return "UTC"
def dst(self, dt):
return ZERO
UTC = Utc()
class FixedOffset(tzinfo):
"""Fixed offset in hours and minutes from UTC
"""
def __init__(self, offset_hours, offset_minutes, name):
self.__offset = timedelta(hours=offset_hours, minutes=offset_minutes)
self.__name = name
def utcoffset(self, dt):
return self.__offset
def tzname(self, dt):
return self.__name
def dst(self, dt):
return ZERO
def __repr__(self):
return "<FixedOffset %r>" % self.__name
def parse_timezone(tzstring, default_timezone=UTC):
"""Parses ISO 8601 time zone specs into tzinfo offsets
"""
if tzstring == zulu:
return default_timezone
# This isn't strictly correct, but it's common to encounter dates without
# timezones so I'll assume the default (which defaults to UTC).
# Addresses issue 4.
if tzstring is None:
return default_timezone
m = TIMEZONE_REGEX.match(tzstring)
prefix, hours, minutes = m.groups()
hours, minutes = int(hours), int(minutes)
if prefix == minus:
hours = -hours
minutes = -minutes
return FixedOffset(hours, minutes, tzstring)
def parse_date(datestring, default_timezone=UTC):
"""Parses ISO 8601 dates into datetime objects
The timezone is parsed from the date string. However it is quite common to
have dates without a timezone (not strictly correct). In this case the
default timezone specified in default_timezone is used. This is UTC by
default.
"""
if not isinstance(datestring, bytes):
raise ParseError("Expecting bytes %r" % datestring)
m = ISO8601_REGEX.match(datestring)
if not m:
raise ParseError("Unable to parse date string %r" % datestring)
groups = m.groupdict()
tz = parse_timezone(groups["timezone"], default_timezone=default_timezone)
if groups["fraction"] is None:
groups["fraction"] = 0
else:
groups["fraction"] = int(float("0.%s" % groups["fraction"].decode()) * 1e6)
return datetime(int(groups["year"]), int(groups["month"]), int(groups["day"]),
int(groups["hour"]), int(groups["minute"]), int(groups["second"]),
int(groups["fraction"]), tz)
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