/usr/lib/python3/dist-packages/guessit/date.py is in python3-guessit 0.9.3-1.
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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 | #!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# GuessIt - A library for guessing information from filenames
# Copyright (c) 2013 Nicolas Wack <wackou@gmail.com>
#
# GuessIt is free software; you can redistribute it and/or modify it under
# the terms of the Lesser GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# GuessIt is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# Lesser GNU General Public License for more details.
#
# You should have received a copy of the Lesser GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
from __future__ import absolute_import, division, print_function, unicode_literals
import datetime
import re
from dateutil import parser
_dsep = r'[-/ \.]'
_dsep_bis = r'[-/ \.x]'
date_regexps = [
re.compile('[^\d](\d{8})[^\d]', re.IGNORECASE),
re.compile('[^\d](\d{6})[^\d]', re.IGNORECASE),
re.compile('[^\d](\d{2})%s(\d{1,2})%s(\d{1,2})[^\d]' % (_dsep, _dsep), re.IGNORECASE),
re.compile('[^\d](\d{1,2})%s(\d{1,2})%s(\d{2})[^\d]' % (_dsep, _dsep), re.IGNORECASE),
re.compile('[^\d](\d{4})%s(\d{1,2})%s(\d{1,2})[^\d]' % (_dsep_bis, _dsep), re.IGNORECASE),
re.compile('[^\d](\d{1,2})%s(\d{1,2})%s(\d{4})[^\d]' % (_dsep, _dsep_bis), re.IGNORECASE),
re.compile('[^\d](\d{1,2}(?:st|nd|rd|th)?%s(?:[a-z]{3,10})%s\d{4})[^\d]' % (_dsep, _dsep), re.IGNORECASE)]
def valid_year(year, today=None):
"""Check if number is a valid year"""
if not today:
today = datetime.date.today()
return 1920 < year < today.year + 5
def search_year(string):
"""Looks for year patterns, and if found return the year and group span.
Assumes there are sentinels at the beginning and end of the string that
always allow matching a non-digit delimiting the date.
Note this only looks for valid production years, that is between 1920
and now + 5 years, so for instance 2000 would be returned as a valid
year but 1492 would not.
>>> search_year(' in the year 2000... ')
(2000, (13, 17))
>>> search_year(' they arrived in 1492. ')
(None, None)
"""
match = re.search(r'[^0-9]([0-9]{4})[^0-9]', string)
if match:
year = int(match.group(1))
if valid_year(year):
return (year, match.span(1))
return (None, None)
def search_date(string, year_first=None, day_first=True):
"""Looks for date patterns, and if found return the date and group span.
Assumes there are sentinels at the beginning and end of the string that
always allow matching a non-digit delimiting the date.
Year can be defined on two digit only. It will return the nearest possible
date from today.
>>> search_date(' This happened on 2002-04-22. ')
(datetime.date(2002, 4, 22), (18, 28))
>>> search_date(' And this on 17-06-1998. ')
(datetime.date(1998, 6, 17), (13, 23))
>>> search_date(' no date in here ')
(None, None)
"""
start, end = None, None
match = None
for date_re in date_regexps:
s = date_re.search(string)
if s and (match is None or s.end() - s.start() > len(match)):
start, end = s.start(), s.end()
if date_re.groups:
match = '-'.join(s.groups())
else:
match = s.group()
if match is None:
return None, None
today = datetime.date.today()
date = None
# If day_first/year_first is undefined, parse is made using both possible values.
yearfirst_opts = [False, True]
if year_first is not None:
yearfirst_opts = [year_first]
dayfirst_opts = [True, False]
if day_first is not None:
dayfirst_opts = [day_first]
kwargs_list = ({'dayfirst': d, 'yearfirst': y} for d in dayfirst_opts for y in yearfirst_opts)
for kwargs in kwargs_list:
try:
date = parser.parse(match, **kwargs)
except (ValueError, TypeError) as e: #see https://bugs.launchpad.net/dateutil/+bug/1247643
date = None
pass
# check date plausibility
if date and valid_year(date.year, today=today):
return (date.date(), (start+1, end-1)) #compensate for sentinels
return None, None
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