iso8601-0.1.10/0000755000076500000240000000000012303653102013422 5ustar michaelstaff00000000000000iso8601-0.1.10/dev-requirements.txt0000644000076500000240000000006312303653101017460 0ustar michaelstaff00000000000000devpi>=1.2.1 pytest>=2.5.2 tox>=1.7.0 wheel>=0.22.0iso8601-0.1.10/iso8601/0000755000076500000240000000000012303653102014533 5ustar michaelstaff00000000000000iso8601-0.1.10/iso8601/__init__.py0000644000076500000240000000002712303653101016642 0ustar michaelstaff00000000000000from .iso8601 import * iso8601-0.1.10/iso8601/iso8601.py0000644000076500000240000001350612303653101016222 0ustar michaelstaff00000000000000"""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=) >>> """ from datetime import ( datetime, timedelta, tzinfo ) from decimal import Decimal import logging import sys import re __all__ = ["parse_date", "ParseError"] LOG = logging.getLogger(__name__) if sys.version_info >= (3, 0, 0): _basestring = str else: _basestring = basestring # Adapted from http://delete.me.uk/2005/03/iso8601.html ISO8601_REGEX = re.compile( r""" (?P[0-9]{4}) ( ( (-(?P[0-9]{1,2})) | (?P[0-9]{2}) (?!$) # Don't allow YYYYMM ) ( ( (-(?P[0-9]{1,2})) | (?P[0-9]{2}) ) ( ( (?P[ T]) (?P[0-9]{2}) (:{0,1}(?P[0-9]{2})){0,1} ( :{0,1}(?P[0-9]{1,2}) (\.(?P[0-9]+)){0,1} ){0,1} (?P Z | ( (?P[-+]) (?P[0-9]{2}) :{0,1} (?P[0-9]{2}){0,1} ) ){0,1} ){0,1} ) ){0,1} # YYYY-MM ){0,1} # YYYY only $ """, re.VERBOSE ) 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_hours = offset_hours # Keep for later __getinitargs__ self.__offset_minutes = offset_minutes # Keep for later __getinitargs__ self.__offset = timedelta(hours=offset_hours, minutes=offset_minutes) self.__name = name def __eq__(self, other): if isinstance(other, FixedOffset): return ( (other.__offset == self.__offset) and (other.__name == self.__name) ) if isinstance(other, tzinfo): return other == self return False def __getinitargs__(self): return (self.__offset_hours, self.__offset_minutes, self.__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 "" % (self.__name, self.__offset) def to_int(d, key, default_to_zero=False, default=None, required=True): """Pull a value from the dict and convert to int :param default_to_zero: If the value is None or empty, treat it as zero :param default: If the value is missing in the dict use this default """ value = d.get(key) or default LOG.debug("Got %r for %r with default %r", value, key, default) if (value in ["", None]) and default_to_zero: return 0 if value is None: if required: raise ParseError("Unable to read %s from %s" % (key, d)) else: return int(value) def parse_timezone(matches, default_timezone=UTC): """Parses ISO 8601 time zone specs into tzinfo offsets """ if matches["timezone"] == "Z": return UTC # 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 matches["timezone"] is None: return default_timezone sign = matches["tz_sign"] hours = to_int(matches, "tz_hour") minutes = to_int(matches, "tz_minute", default_to_zero=True) description = "%s%02d:%02d" % (sign, hours, minutes) if sign == "-": hours = -hours minutes = -minutes return FixedOffset(hours, minutes, description) 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, _basestring): raise ParseError("Expecting a string %r" % datestring) m = ISO8601_REGEX.match(datestring) if not m: raise ParseError("Unable to parse date string %r" % datestring) groups = m.groupdict() LOG.debug("Parsed %s into %s with default timezone %s", datestring, groups, default_timezone) tz = parse_timezone(groups, default_timezone=default_timezone) groups["second_fraction"] = int(Decimal("0.%s" % (groups["second_fraction"] or 0)) * Decimal("1000000.0")) try: return datetime( year=to_int(groups, "year"), month=to_int(groups, "month", default=to_int(groups, "monthdash", required=False, default=1)), day=to_int(groups, "day", default=to_int(groups, "daydash", required=False, default=1)), hour=to_int(groups, "hour", default_to_zero=True), minute=to_int(groups, "minute", default_to_zero=True), second=to_int(groups, "second", default_to_zero=True), microsecond=groups["second_fraction"], tzinfo=tz, ) except Exception as e: raise ParseError(e) iso8601-0.1.10/iso8601/test_iso8601.py0000644000076500000240000001650012303653101017256 0ustar michaelstaff00000000000000# coding=UTF-8 from __future__ import absolute_import import copy import datetime import pickle import pytest from iso8601 import iso8601 def test_iso8601_regex(): assert iso8601.ISO8601_REGEX.match("2006-10-11T00:14:33Z") def test_parse_no_timezone_different_default(): tz = iso8601.FixedOffset(2, 0, "test offset") d = iso8601.parse_date("2007-01-01T08:00:00", default_timezone=tz) assert d == datetime.datetime(2007, 1, 1, 8, 0, 0, 0, tz) assert d.tzinfo == tz def test_parse_utc_different_default(): """Z should mean 'UTC', not 'default'. """ tz = iso8601.FixedOffset(2, 0, "test offset") d = iso8601.parse_date("2007-01-01T08:00:00Z", default_timezone=tz) assert d == datetime.datetime(2007, 1, 1, 8, 0, 0, 0, iso8601.UTC) @pytest.mark.parametrize("invalid_date, error_string", [ ("2013-10-", "Unable to parse date string"), ("2013-", "Unable to parse date string"), ("", "Unable to parse date string"), (None, "Expecting a string"), ("wibble", "Unable to parse date string"), ("23", "Unable to parse date string"), ("131015T142533Z", "Unable to parse date string"), ("131015", "Unable to parse date string"), ("20141", "Unable to parse date string"), ("201402", "Unable to parse date string"), ("2007-06-23X06:40:34.00Z", "Unable to parse date string"), # https://code.google.com/p/pyiso8601/issues/detail?id=14 ("2007-06-23 06:40:34.00Zrubbish", "Unable to parse date string"), # https://code.google.com/p/pyiso8601/issues/detail?id=14 ("20114-01-03T01:45:49", "Unable to parse date string"), ]) def test_parse_invalid_date(invalid_date, error_string): assert isinstance(invalid_date, str) or invalid_date is None # Why? 'cos I've screwed up the parametrize before :) with pytest.raises(iso8601.ParseError) as exc: iso8601.parse_date(invalid_date) assert exc.errisinstance(iso8601.ParseError) assert str(exc.value).startswith(error_string) @pytest.mark.parametrize("valid_date,expected_datetime,isoformat", [ ("2007-06-23 06:40:34.00Z", datetime.datetime(2007, 6, 23, 6, 40, 34, 0, iso8601.UTC), "2007-06-23T06:40:34+00:00"), # Handle a separator other than T ("1997-07-16T19:20+01:00", datetime.datetime(1997, 7, 16, 19, 20, 0, 0, iso8601.FixedOffset(1, 0, "+01:00")), "1997-07-16T19:20:00+01:00"), # Parse with no seconds ("2007-01-01T08:00:00", datetime.datetime(2007, 1, 1, 8, 0, 0, 0, iso8601.UTC), "2007-01-01T08:00:00+00:00"), # Handle timezone-less dates. Assumes UTC. http://code.google.com/p/pyiso8601/issues/detail?id=4 ("2006-10-20T15:34:56.123+02:30", datetime.datetime(2006, 10, 20, 15, 34, 56, 123000, iso8601.FixedOffset(2, 30, "+02:30")), None), ("2006-10-20T15:34:56Z", datetime.datetime(2006, 10, 20, 15, 34, 56, 0, iso8601.UTC), "2006-10-20T15:34:56+00:00"), ("2007-5-7T11:43:55.328Z", datetime.datetime(2007, 5, 7, 11, 43, 55, 328000, iso8601.UTC), "2007-05-07T11:43:55.328000+00:00"), # http://code.google.com/p/pyiso8601/issues/detail?id=6 ("2006-10-20T15:34:56.123Z", datetime.datetime(2006, 10, 20, 15, 34, 56, 123000, iso8601.UTC), "2006-10-20T15:34:56.123000+00:00"), ("2013-10-15T18:30Z", datetime.datetime(2013, 10, 15, 18, 30, 0, 0, iso8601.UTC), "2013-10-15T18:30:00+00:00"), ("2013-10-15T22:30+04", datetime.datetime(2013, 10, 15, 22, 30, 0, 0, iso8601.FixedOffset(4, 0, "+04:00")), "2013-10-15T22:30:00+04:00"), #