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6�cY���@sdZddlmZddlZddlZddlZddlZddlZddlm	Z	ddl
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This module offers a generic date/time string parser which is able to parse
most known formats to represent a date and/or time.

This module attempts to be forgiving with regards to unlikely input formats,
returning a datetime object even for dates which are ambiguous. If an element
of a date/time stamp is omitted, the following rules are applied:
- If AM or PM is left unspecified, a 24-hour clock is assumed, however, an hour
  on a 12-hour clock (``0 <= hour <= 12``) *must* be specified if AM or PM is
  specified.
- If a time zone is omitted, a timezone-naive datetime is returned.

If any other elements are missing, they are taken from the
:class:`datetime.datetime` object passed to the parameter ``default``. If this
results in a day number exceeding the valid number of days per month, the
value falls back to the end of the month.

Additional resources about date/time string formats can be found below:

- `A summary of the international standard date and time notation
  <http://www.cl.cam.ac.uk/~mgk25/iso-time.html>`_
- `W3C Date and Time Formats <http://www.w3.org/TR/NOTE-datetime>`_
- `Time Formats (Planetary Rings Node) <http://pds-rings.seti.org/tools/time_formats.html>`_
- `CPAN ParseDate module
  <http://search.cpan.org/~muir/Time-modules-2013.0912/lib/Time/ParseDate.pm>`_
- `Java SimpleDateFormat Class
  <https://docs.oracle.com/javase/6/docs/api/java/text/SimpleDateFormat.html>`_
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        Parse the date/time string into a :class:`datetime.datetime` object.

        :param timestr:
            Any date/time string using the supported formats.

        :param default:
            The default datetime object, if this is a datetime object and not
            ``None``, elements specified in ``timestr`` replace elements in the
            default object.

        :param ignoretz:
            If set ``True``, time zones in parsed strings are ignored and a
            naive :class:`datetime.datetime` object is returned.

        :param tzinfos:
            Additional time zone names / aliases which may be present in the
            string. This argument maps time zone names (and optionally offsets
            from those time zones) to time zones. This parameter can be a
            dictionary with timezone aliases mapping time zone names to time
            zones or a function taking two parameters (``tzname`` and
            ``tzoffset``) and returning a time zone.

            The timezones to which the names are mapped can be an integer
            offset from UTC in minutes or a :class:`tzinfo` object.

            .. doctest::
               :options: +NORMALIZE_WHITESPACE

                >>> from dateutil.parser import parse
                >>> from dateutil.tz import gettz
                >>> tzinfos = {"BRST": -10800, "CST": gettz("America/Chicago")}
                >>> parse("2012-01-19 17:21:00 BRST", tzinfos=tzinfos)
                datetime.datetime(2012, 1, 19, 17, 21, tzinfo=tzoffset(u'BRST', -10800))
                >>> parse("2012-01-19 17:21:00 CST", tzinfos=tzinfos)
                datetime.datetime(2012, 1, 19, 17, 21,
                                  tzinfo=tzfile('/usr/share/zoneinfo/America/Chicago'))

            This parameter is ignored if ``ignoretz`` is set.

        :param **kwargs:
            Keyword arguments as passed to ``_parse()``.

        :return:
            Returns a :class:`datetime.datetime` object or, if the
            ``fuzzy_with_tokens`` option is ``True``, returns a tuple, the
            first element being a :class:`datetime.datetime` object, the second
            a tuple containing the fuzzy tokens.

        :raises ValueError:
            Raised for invalid or unknown string format, if the provided
            :class:`tzinfo` is not in a valid format, or if an invalid date
            would be created.

        :raises TypeError:
            Raised for non-string or character stream input.

        :raises OverflowError:
            Raised if the parsed date exceeds the largest valid C integer on
            your system.
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        Private method which performs the heavy lifting of parsing, called from
        ``parse()``, which passes on its ``kwargs`` to this function.

        :param timestr:
            The string to parse.

        :param dayfirst:
            Whether to interpret the first value in an ambiguous 3-integer date
            (e.g. 01/05/09) as the day (``True``) or month (``False``). If
            ``yearfirst`` is set to ``True``, this distinguishes between YDM
            and YMD. If set to ``None``, this value is retrieved from the
            current :class:`parserinfo` object (which itself defaults to
            ``False``).

        :param yearfirst:
            Whether to interpret the first value in an ambiguous 3-integer date
            (e.g. 01/05/09) as the year. If ``True``, the first number is taken
            to be the year, otherwise the last number is taken to be the year.
            If this is set to ``None``, the value is retrieved from the current
            :class:`parserinfo` object (which itself defaults to ``False``).

        :param fuzzy:
            Whether to allow fuzzy parsing, allowing for string like "Today is
            January 1, 2047 at 8:21:00AM".

        :param fuzzy_with_tokens:
            If ``True``, ``fuzzy`` is automatically set to True, and the parser
            will return a tuple where the first element is the parsed
            :class:`datetime.datetime` datetimestamp and the second element is
            a tuple containing the portions of the string which were ignored:

            .. doctest::

                >>> from dateutil.parser import parse
                >>> parse("Today is January 1, 2047 at 8:21:00AM", fuzzy_with_tokens=True)
                (datetime.datetime(2047, 1, 1, 8, 21), (u'Today is ', u' ', u'at '))

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    Parse a string in one of the supported formats, using the
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    :param timestr:
        A string containing a date/time stamp.

    :param parserinfo:
        A :class:`parserinfo` object containing parameters for the parser.
        If ``None``, the default arguments to the :class:`parserinfo`
        constructor are used.

    The ``**kwargs`` parameter takes the following keyword arguments:

    :param default:
        The default datetime object, if this is a datetime object and not
        ``None``, elements specified in ``timestr`` replace elements in the
        default object.

    :param ignoretz:
        If set ``True``, time zones in parsed strings are ignored and a naive
        :class:`datetime` object is returned.

    :param tzinfos:
            Additional time zone names / aliases which may be present in the
            string. This argument maps time zone names (and optionally offsets
            from those time zones) to time zones. This parameter can be a
            dictionary with timezone aliases mapping time zone names to time
            zones or a function taking two parameters (``tzname`` and
            ``tzoffset``) and returning a time zone.

            The timezones to which the names are mapped can be an integer
            offset from UTC in minutes or a :class:`tzinfo` object.

            .. doctest::
               :options: +NORMALIZE_WHITESPACE

                >>> from dateutil.parser import parse
                >>> from dateutil.tz import gettz
                >>> tzinfos = {"BRST": -10800, "CST": gettz("America/Chicago")}
                >>> parse("2012-01-19 17:21:00 BRST", tzinfos=tzinfos)
                datetime.datetime(2012, 1, 19, 17, 21, tzinfo=tzoffset(u'BRST', -10800))
                >>> parse("2012-01-19 17:21:00 CST", tzinfos=tzinfos)
                datetime.datetime(2012, 1, 19, 17, 21,
                                  tzinfo=tzfile('/usr/share/zoneinfo/America/Chicago'))

            This parameter is ignored if ``ignoretz`` is set.

    :param dayfirst:
        Whether to interpret the first value in an ambiguous 3-integer date
        (e.g. 01/05/09) as the day (``True``) or month (``False``). If
        ``yearfirst`` is set to ``True``, this distinguishes between YDM and
        YMD. If set to ``None``, this value is retrieved from the current
        :class:`parserinfo` object (which itself defaults to ``False``).

    :param yearfirst:
        Whether to interpret the first value in an ambiguous 3-integer date
        (e.g. 01/05/09) as the year. If ``True``, the first number is taken to
        be the year, otherwise the last number is taken to be the year. If
        this is set to ``None``, the value is retrieved from the current
        :class:`parserinfo` object (which itself defaults to ``False``).

    :param fuzzy:
        Whether to allow fuzzy parsing, allowing for string like "Today is
        January 1, 2047 at 8:21:00AM".

    :param fuzzy_with_tokens:
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        will return a tuple where the first element is the parsed
        :class:`datetime.datetime` datetimestamp and the second element is
        a tuple containing the portions of the string which were ignored:

        .. doctest::

            >>> from dateutil.parser import parse
            >>> parse("Today is January 1, 2047 at 8:21:00AM", fuzzy_with_tokens=True)
            (datetime.datetime(2047, 1, 1, 8, 21), (u'Today is ', u' ', u'at '))

    :return:
        Returns a :class:`datetime.datetime` object or, if the
        ``fuzzy_with_tokens`` option is ``True``, returns a tuple, the
        first element being a :class:`datetime.datetime` object, the second
        a tuple containing the fuzzy tokens.

    :raises ValueError:
        Raised for invalid or unknown string format, if the provided
        :class:`tzinfo` is not in a valid format, or if an invalid date
        would be created.

    :raises OverflowError:
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