Python dateutil.parser.parse() Examples

def __new__(cls, t, snap=0):
        if isinstance(t, (str, bytes)) and t.isdigit():
            t = int(t)
        if not isinstance(t, (str, bytes)):
            from dateutil.tz import tzutc
            return datetime.fromtimestamp(t // 1000, tz=tzutc())
        try:
            units = ["weeks", "days", "hours", "minutes", "seconds"]
            diffs = {u: float(t[:-1]) for u in units if u.startswith(t[-1])}
            if len(diffs) == 1:
                # Snap > 0 governs the rounding of units (hours, minutes and seconds) to 0 to improve cache performance
                snap_units = {u.rstrip("s"): 0 for u in units[units.index(list(diffs)[0]) + snap:]} if snap else {}
                snap_units.pop("day", None)
                snap_units.update(microsecond=0)
                ts = datetime.now().replace(**snap_units) + relativedelta(**diffs)
                cls._precision[ts] = snap_units
                return ts
            return dateutil_parse(t)
        except (ValueError, OverflowError, AssertionError):
            raise ValueError('Could not parse "{}" as a timestamp or time delta'.format(t)) 

def as_date(val):
    '''Casts the value to a ``datetime.date`` object if possible

    Else raises ``TypeError``
    '''
    # Important to check if datetime first because datetime.date objects
    # pass the isinstance(obj, datetime.date) test
    if isinstance(val, datetime.datetime):
        return val.date()
    elif isinstance(val, datetime.date):
        return val
    elif isinstance(val, basestring):  # noqa: F821
        return dateutil_parse(val).date()
    else:
        raise TypeError(
            'date cannot be of type "{}".'.format(type(val)) +
            ' It must be able to be cast to a datetime.date') 

def test_ybd(self):
        # If we have a 4-digit year, a non-numeric month (abbreviated or not),
        # and a day (1 or 2 digits), then there is no ambiguity as to which
        # token is a year/month/day.  This holds regardless of what order the
        # terms are in and for each of the separators below.

        seps = ['-', ' ', '/', '.']

        year_tokens = ['%Y']
        month_tokens = ['%b', '%B']
        day_tokens = ['%d']
        if PLATFORM_HAS_DASH_D:
            day_tokens.append('%-d')

        prods = itertools.product(year_tokens, month_tokens, day_tokens)
        perms = [y for x in prods for y in itertools.permutations(x)]
        unambig_fmts = [sep.join(perm) for sep in seps for perm in perms]

        actual = datetime(2003, 9, 25)

        for fmt in unambig_fmts:
            dstr = actual.strftime(fmt)
            res = parse(dstr)
            self.assertEqual(res, actual) 

def test_get_course_enrollments(self, query_params, filter_args):
        expected_data = CourseEnrollment.objects.filter(**filter_args)
        request = APIRequestFactory().get(self.request_path + query_params)
        force_authenticate(request, user=self.staff_user)
        view = self. view_class.as_view({'get': 'list'})
        response = view(request)

        assert response.status_code == 200
        assert set(response.data.keys()) == set(
            ['count', 'next', 'previous', 'results',])

        assert len(response.data['results']) == len(expected_data)

        for data in response.data['results']:
            db_rec = expected_data.get(id=data['id'])
            assert parse(data['created']) == db_rec.created 

def as_datetime(val):
    '''
    TODO: Add arg flag to say if caller wants end of day, beginning of day
    or a particular time of day if the param is a datetime.date obj
    '''
    if isinstance(val, datetime.datetime):
        return val
    elif isinstance(val, datetime.date):
        # Return the end of the day, set timezone to be UTC
        return datetime.datetime(
            year=val.year,
            month=val.month,
            day=val.day,
            ).replace(tzinfo=utc)

    elif isinstance(val, basestring):  # noqa: F821
        return dateutil_parse(val).replace(tzinfo=utc)
    else:
        raise TypeError(
            'value of type "{}" cannot be converted to a datetime object'.format(
                type(val))) 

def testParseUnicodeWords(self):

        class rus_parserinfo(parserinfo):
            MONTHS = [("янв", "Январь"),
                      ("фев", "Февраль"),
                      ("мар", "Март"),
                      ("апр", "Апрель"),
                      ("май", "Май"),
                      ("июн", "Июнь"),
                      ("июл", "Июль"),
                      ("авг", "Август"),
                      ("сен", "Сентябрь"),
                      ("окт", "Октябрь"),
                      ("ноя", "Ноябрь"),
                      ("дек", "Декабрь")]

        self.assertEqual(parse('10 Сентябрь 2015 10:20',
                               parserinfo=rus_parserinfo()),
                         datetime(2015, 9, 10, 10, 20)) 

def __deserialize_date(self, string):
        """Deserializes string to date.

        :param string: str.
        :return: date.
        """
        try:
            from dateutil.parser import parse
            return parse(string).date()
        except ImportError:
            return string
        except ValueError:
            raise rest.ApiException(
                status=0,
                reason="Failed to parse `{0}` as date object".format(string)
            ) 

def __deserialize_datatime(self, string):
        """Deserializes string to datetime.

        The string should be in iso8601 datetime format.

        :param string: str.
        :return: datetime.
        """
        try:
            from dateutil.parser import parse
            return parse(string)
        except ImportError:
            return string
        except ValueError:
            raise rest.ApiException(
                status=0,
                reason=(
                    "Failed to parse `{0}` as datetime object"
                    .format(string)
                )
            ) 

def detect_date(e):
    if is_date(e): return True
    for date_type in [ datetime.datetime, datetime.date, np.datetime64 ]:
        if isinstance(e, date_type): return True

    # Slow!!!
    # for date_format in DATE_FORMATS:
    #     try:
    #         if datetime.strptime(e, date_format):
    #             return True
    #     except:
    #         continue

    # Also slow
    # try: 
    #   dparser.parse(e)
    #   return True
    # except: pass
    return False 

def testISOStrippedFormatStrip3(self):
        self.assertEqual(parse("20030925T1049"),
                         datetime(2003, 9, 25, 10, 49, 0)) 

def testDateCommandFormatStrip4(self):
        self.assertEqual(parse("Thu 10:36:28", default=self.default),
                         datetime(2003, 9, 25, 10, 36, 28)) 

def testDateCommandFormatStrip5(self):
        self.assertEqual(parse("Sep 10:36:28", default=self.default),
                         datetime(2003, 9, 25, 10, 36, 28)) 

def testDateCommandFormatStrip6(self):
        self.assertEqual(parse("10:36:28", default=self.default),
                         datetime(2003, 9, 25, 10, 36, 28)) 

def testDateCommandFormatStrip7(self):
        self.assertEqual(parse("10:36", default=self.default),
                         datetime(2003, 9, 25, 10, 36)) 

def testDateCommandFormatStrip1(self):
        self.assertEqual(parse("Thu Sep 25 10:36:28 2003"),
                         datetime(2003, 9, 25, 10, 36, 28)) 

def testISOStrippedFormatStrip5(self):
        self.assertEqual(parse("20030925"),
                         datetime(2003, 9, 25)) 

def testISOStrippedFormatStrip4(self):
        self.assertEqual(parse("20030925T10"),
                         datetime(2003, 9, 25, 10)) 

def testPythonLoggerFormat(self):
        self.assertEqual(parse("2003-09-25 10:49:41,502"),
                         datetime(2003, 9, 25, 10, 49, 41, 502000)) 

def testISOStrippedFormatStrip1(self):
        self.assertEqual(parse("20030925T104941-0300"),
                         datetime(2003, 9, 25, 10, 49, 41,
                                  tzinfo=self.brsttz)) 

def testDateCommandFormatStrip2(self):
        self.assertEqual(parse("Thu Sep 25 10:36:28", default=self.default),
                         datetime(2003, 9, 25, 10, 36, 28)) 

def testDateCommandFormatStrip11(self):
        self.assertEqual(parse("Sep", default=self.default),
                         datetime(2003, 9, 25)) 

def testDateCommandFormatIgnoreTz(self):
        self.assertEqual(parse("Thu Sep 25 10:36:28 BRST 2003",
                               ignoretz=True),
                         datetime(2003, 9, 25, 10, 36, 28)) 

def testDateCommandFormatWithLong(self):
        if not PY3:
            self.assertEqual(parse("Thu Sep 25 10:36:28 BRST 2003",
                                   tzinfos={"BRST": long(-10800)}),
                             datetime(2003, 9, 25, 10, 36, 28,
                                      tzinfo=self.brsttz)) 

def testDateCommandFormatReversed(self):
        self.assertEqual(parse("2003 10:36:28 BRST 25 Sep Thu",
                               tzinfos=self.tzinfos),
                         datetime(2003, 9, 25, 10, 36, 28,
                                  tzinfo=self.brsttz)) 

def testDateCommandFormat(self):
        self.assertEqual(parse("Thu Sep 25 10:36:28 BRST 2003",
                               tzinfos=self.tzinfos),
                         datetime(2003, 9, 25, 10, 36, 28,
                                  tzinfo=self.brsttz)) 

def testParseWithNulls(self):
        # This relies on the from __future__ import unicode_literals, because
        # explicitly specifying a unicode literal is a syntax error in Py 3.2
        # May want to switch to u'...' if we ever drop Python 3.2 support.
        pstring = '\x00\x00August 29, 1924'

        self.assertEqual(parse(pstring),
                         datetime(1924, 8, 29)) 

def testParserParseStr(self):
        from dateutil.parser import parser

        self.assertEqual(parser().parse(self.str_str),
                         parser().parse(self.uni_str)) 

def testParseBytearray(self):
        # GH #417
        self.assertEqual(parse(bytearray(b'2014 January 19')),
                         datetime(2014, 1, 19)) 

def testParseStr(self):
        self.assertEqual(parse(self.str_str),
                         parse(self.uni_str)) 

def testParseStream(self):
        dstr = StringIO('2014 January 19')

        self.assertEqual(parse(dstr), datetime(2014, 1, 19))