Source code for dateutil.parser

# -*- coding:iso-8859-1 -*-
"""
This module offers a generic date/time string parser which is able to parse
most known formats to represent a date and/or time.

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>`_
"""
from __future__ import unicode_literals

import datetime
import string
import time
import collections
from io import StringIO

from six import text_type, binary_type, integer_types

from . import relativedelta
from . import tz

__all__ = ["parse", "parserinfo"]


class _timelex(object):

    def __init__(self, instream):
        if isinstance(instream, text_type):
            instream = StringIO(instream)

        self.instream = instream
        self.wordchars = ('abcdfeghijklmnopqrstuvwxyz'
                          'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'
                          'ßàáâãäåæçèéêëìíîïðñòóôõöøùúûüýþÿ'
                          'ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖØÙÚÛÜÝÞ')
        self.numchars = '0123456789'
        self.whitespace = ' \t\r\n'
        self.charstack = []
        self.tokenstack = []
        self.eof = False

    def get_token(self):
        """
        This function breaks the time string into lexical units (tokens), which
        can be parsed by the parser. Lexical units are demarcated by changes in
        the character set, so any continuous string of letters is considered one
        unit, any continuous string of numbers is considered one unit.

        The main complication arises from the fact that dots ('.') can be used
        both as separators (e.g. "Sep.20.2009") or decimal points (e.g.
        "4:30:21.447"). As such, it is necessary to read the full context of
        any dot-separated strings before breaking it into tokens; as such, this
        function maintains a "token stack", for when the ambiguous context
        demands that multiple tokens be parsed at once.
        """
        if self.tokenstack:
            return self.tokenstack.pop(0)

        seenletters = False
        token = None
        state = None
        wordchars = self.wordchars
        numchars = self.numchars
        whitespace = self.whitespace

        while not self.eof:
            # We only realize that we've reached the end of a token when we find
            # a character that's not part of the current token - since that
            # character may be part of the next token, it's stored in the
            # charstack.
            if self.charstack:
                nextchar = self.charstack.pop(0)
            else:
                nextchar = self.instream.read(1)
                while nextchar == '\x00':
                    nextchar = self.instream.read(1)

            if not nextchar:
                self.eof = True
                break
            elif not state:
                # First character of the token - determines if we're starting
                # to parse a word, a number or something else.
                token = nextchar
                if nextchar in wordchars:
                    state = 'a'
                elif nextchar in numchars:
                    state = '0'
                elif nextchar in whitespace:
                    token = ' '
                    break  # emit token
                else:
                    break  # emit token
            elif state == 'a':
                # If we've already started reading a word, we keep reading
                # letters until we find something that's not part of a word.
                seenletters = True
                if nextchar in wordchars:
                    token += nextchar
                elif nextchar == '.':
                    token += nextchar
                    state = 'a.'
                else:
                    self.charstack.append(nextchar)
                    break  # emit token
            elif state == '0':
                # If we've already started reading a number, we keep reading
                # numbers until we find something that doesn't fit.
                if nextchar in numchars:
                    token += nextchar
                elif nextchar == '.':
                    token += nextchar
                    state = '0.'
                else:
                    self.charstack.append(nextchar)
                    break  # emit token
            elif state == 'a.':
                # If we've seen some letters and a dot separator, continue
                # parsing, and the tokens will be broken up later.
                seenletters = True
                if nextchar == '.' or nextchar in wordchars:
                    token += nextchar
                elif nextchar in numchars and token[-1] == '.':
                    token += nextchar
                    state = '0.'
                else:
                    self.charstack.append(nextchar)
                    break  # emit token
            elif state == '0.':
                # If we've seen at least one dot separator, keep going, we'll
                # break up the tokens later.
                if nextchar == '.' or nextchar in numchars:
                    token += nextchar
                elif nextchar in wordchars and token[-1] == '.':
                    token += nextchar
                    state = 'a.'
                else:
                    self.charstack.append(nextchar)
                    break  # emit token

        if (state in ('a.', '0.') and (seenletters or token.count('.') > 1 or
                                       token[-1] == '.')):
            l = token.split('.')
            token = l[0]
            for tok in l[1:]:
                self.tokenstack.append('.')
                if tok:
                    self.tokenstack.append(tok)

        return token

    def __iter__(self):
        return self

    def __next__(self):
        token = self.get_token()
        if token is None:
            raise StopIteration

        return token

    def next(self):
        return self.__next__()  # Python 2.x support

    def split(cls, s):
        return list(cls(s))
    split = classmethod(split)


class _resultbase(object):

    def __init__(self):
        for attr in self.__slots__:
            setattr(self, attr, None)

    def _repr(self, classname):
        l = []
        for attr in self.__slots__:
            value = getattr(self, attr)
            if value is not None:
                l.append("%s=%s" % (attr, repr(value)))
        return "%s(%s)" % (classname, ", ".join(l))

    def __repr__(self):
        return self._repr(self.__class__.__name__)


[docs]class parserinfo(object): """ Class which handles what inputs are accepted. Subclass this to customize the language and acceptable values for each parameter. :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. Default is `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. Default is `False`. """ # m from a.m/p.m, t from ISO T separator JUMP = [" ", ".", ",", ";", "-", "/", "'", "at", "on", "and", "ad", "m", "t", "of", "st", "nd", "rd", "th"] WEEKDAYS = [("Mon", "Monday"), ("Tue", "Tuesday"), ("Wed", "Wednesday"), ("Thu", "Thursday"), ("Fri", "Friday"), ("Sat", "Saturday"), ("Sun", "Sunday")] MONTHS = [("Jan", "January"), ("Feb", "February"), ("Mar", "March"), ("Apr", "April"), ("May", "May"), ("Jun", "June"), ("Jul", "July"), ("Aug", "August"), ("Sep", "Sept", "September"), ("Oct", "October"), ("Nov", "November"), ("Dec", "December")] HMS = [("h", "hour", "hours"), ("m", "minute", "minutes"), ("s", "second", "seconds")] AMPM = [("am", "a"), ("pm", "p")] UTCZONE = ["UTC", "GMT", "Z"] PERTAIN = ["of"] TZOFFSET = {} def __init__(self, dayfirst=False, yearfirst=False): self._jump = self._convert(self.JUMP) self._weekdays = self._convert(self.WEEKDAYS) self._months = self._convert(self.MONTHS) self._hms = self._convert(self.HMS) self._ampm = self._convert(self.AMPM) self._utczone = self._convert(self.UTCZONE) self._pertain = self._convert(self.PERTAIN) self.dayfirst = dayfirst self.yearfirst = yearfirst self._year = time.localtime().tm_year self._century = self._year // 100*100 def _convert(self, lst): dct = {} for i, v in enumerate(lst): if isinstance(v, tuple): for v in v: dct[v.lower()] = i else: dct[v.lower()] = i return dct
[docs] def jump(self, name): return name.lower() in self._jump
[docs] def weekday(self, name): if len(name) >= 3: try: return self._weekdays[name.lower()] except KeyError: pass return None
[docs] def month(self, name): if len(name) >= 3: try: return self._months[name.lower()]+1 except KeyError: pass return None
[docs] def hms(self, name): try: return self._hms[name.lower()] except KeyError: return None
[docs] def ampm(self, name): try: return self._ampm[name.lower()] except KeyError: return None
[docs] def pertain(self, name): return name.lower() in self._pertain
[docs] def utczone(self, name): return name.lower() in self._utczone
[docs] def tzoffset(self, name): if name in self._utczone: return 0 return self.TZOFFSET.get(name)
[docs] def convertyear(self, year): if year < 100: year += self._century if abs(year-self._year) >= 50: if year < self._year: year += 100 else: year -= 100 return year
[docs] def validate(self, res): # move to info if res.year is not None: res.year = self.convertyear(res.year) if res.tzoffset == 0 and not res.tzname or res.tzname == 'Z': res.tzname = "UTC" res.tzoffset = 0 elif res.tzoffset != 0 and res.tzname and self.utczone(res.tzname): res.tzoffset = 0 return True
class parser(object): def __init__(self, info=None): self.info = info or parserinfo() def parse(self, timestr, default=None, ignoretz=False, tzinfos=None, **kwargs): """ Parse the date/time string into a 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: Whether or not to ignore the time zone. :param tzinfos: A time zone, to be applied to the date, if `ignoretz` is `True`. This can be either a subclass of `tzinfo`, a time zone string or an integer offset. :param **kwargs: Keyword arguments as passed to `_parse()`. :return: Returns a `datetime.datetime` object or, if the `fuzzy_with_tokens` option is `True`, returns a tuple, the first element being a `datetime.datetime` object, the second a tuple containing the fuzzy tokens. :raises ValueError: Raised for invalid or unknown string format. :raises ValueError: Raised if provided `tzinfos` are not in a valid format. """ default_specified = default is not None if not default_specified: default = datetime.datetime.now().replace(hour=0, minute=0, second=0, microsecond=0) if kwargs.get('fuzzy_with_tokens', False): res, skipped_tokens = self._parse(timestr, **kwargs) else: res = self._parse(timestr, **kwargs) if res is None: raise ValueError("Unknown string format") repl = {} for attr in ["year", "month", "day", "hour", "minute", "second", "microsecond"]: value = getattr(res, attr) if value is not None: repl[attr] = value ret = default.replace(**repl) if res.weekday is not None and not res.day: ret = ret+relativedelta.relativedelta(weekday=res.weekday) if not ignoretz: if (isinstance(tzinfos, collections.Callable) or tzinfos and res.tzname in tzinfos): if isinstance(tzinfos, collections.Callable): tzdata = tzinfos(res.tzname, res.tzoffset) else: tzdata = tzinfos.get(res.tzname) if isinstance(tzdata, datetime.tzinfo): tzinfo = tzdata elif isinstance(tzdata, text_type): tzinfo = tz.tzstr(tzdata) elif isinstance(tzdata, integer_types): tzinfo = tz.tzoffset(res.tzname, tzdata) else: raise ValueError("Offset must be tzinfo subclass, " "tz string, or int offset.") ret = ret.replace(tzinfo=tzinfo) elif res.tzname and res.tzname in time.tzname: ret = ret.replace(tzinfo=tz.tzlocal()) elif res.tzoffset == 0: ret = ret.replace(tzinfo=tz.tzutc()) elif res.tzoffset: ret = ret.replace(tzinfo=tz.tzoffset(res.tzname, res.tzoffset)) if kwargs.get('fuzzy_with_tokens', False): return ret, skipped_tokens else: return ret class _result(_resultbase): __slots__ = ["year", "month", "day", "weekday", "hour", "minute", "second", "microsecond", "tzname", "tzoffset"] def _parse(self, timestr, dayfirst=None, yearfirst=None, fuzzy=False, fuzzy_with_tokens=False): """ 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 `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 `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 `datetime.datetime` datetimestamp and the second element is a tuple containing the portions of the string which were ignored, e.g. "Today is January 1, 2047 at 8:21:00AM" should return `(datetime.datetime(2011, 1, 1, 8, 21), (u'Today is ', u' ', u'at '))` """ if fuzzy_with_tokens: fuzzy = True info = self.info if dayfirst is None: dayfirst = info.dayfirst if yearfirst is None: yearfirst = info.yearfirst res = self._result() l = _timelex.split(timestr) # Splits the timestr into tokens # keep up with the last token skipped so we can recombine # consecutively skipped tokens (-2 for when i begins at 0). last_skipped_token_i = -2 skipped_tokens = list() try: # year/month/day list ymd = [] # Index of the month string in ymd mstridx = -1 len_l = len(l) i = 0 while i < len_l: # Check if it's a number try: value_repr = l[i] value = float(value_repr) except ValueError: value = None if value is not None: # Token is a number len_li = len(l[i]) i += 1 if (len(ymd) == 3 and len_li in (2, 4) and res.hour is None and (i >= len_l or (l[i] != ':' and info.hms(l[i]) is None))): # 19990101T23[59] s = l[i-1] res.hour = int(s[:2]) if len_li == 4: res.minute = int(s[2:]) elif len_li == 6 or (len_li > 6 and l[i-1].find('.') == 6): # YYMMDD or HHMMSS[.ss] s = l[i-1] if not ymd and l[i-1].find('.') == -1: ymd.append(info.convertyear(int(s[:2]))) ymd.append(int(s[2:4])) ymd.append(int(s[4:])) else: # 19990101T235959[.59] res.hour = int(s[:2]) res.minute = int(s[2:4]) res.second, res.microsecond = _parsems(s[4:]) elif len_li == 8: # YYYYMMDD s = l[i-1] ymd.append(int(s[:4])) ymd.append(int(s[4:6])) ymd.append(int(s[6:])) elif len_li in (12, 14): # YYYYMMDDhhmm[ss] s = l[i-1] ymd.append(int(s[:4])) ymd.append(int(s[4:6])) ymd.append(int(s[6:8])) res.hour = int(s[8:10]) res.minute = int(s[10:12]) if len_li == 14: res.second = int(s[12:]) elif ((i < len_l and info.hms(l[i]) is not None) or (i+1 < len_l and l[i] == ' ' and info.hms(l[i+1]) is not None)): # HH[ ]h or MM[ ]m or SS[.ss][ ]s if l[i] == ' ': i += 1 idx = info.hms(l[i]) while True: if idx == 0: res.hour = int(value) if value % 1: res.minute = int(60*(value % 1)) elif idx == 1: res.minute = int(value) if value % 1: res.second = int(60*(value % 1)) elif idx == 2: res.second, res.microsecond = \ _parsems(value_repr) i += 1 if i >= len_l or idx == 2: break # 12h00 try: value_repr = l[i] value = float(value_repr) except ValueError: break else: i += 1 idx += 1 if i < len_l: newidx = info.hms(l[i]) if newidx is not None: idx = newidx elif (i == len_l and l[i-2] == ' ' and info.hms(l[i-3]) is not None): # X h MM or X m SS idx = info.hms(l[i-3]) + 1 if idx == 1: res.minute = int(value) if value % 1: res.second = int(60*(value % 1)) elif idx == 2: res.second, res.microsecond = \ _parsems(value_repr) i += 1 elif i+1 < len_l and l[i] == ':': # HH:MM[:SS[.ss]] res.hour = int(value) i += 1 value = float(l[i]) res.minute = int(value) if value % 1: res.second = int(60*(value % 1)) i += 1 if i < len_l and l[i] == ':': res.second, res.microsecond = _parsems(l[i+1]) i += 2 elif i < len_l and l[i] in ('-', '/', '.'): sep = l[i] ymd.append(int(value)) i += 1 if i < len_l and not info.jump(l[i]): try: # 01-01[-01] ymd.append(int(l[i])) except ValueError: # 01-Jan[-01] value = info.month(l[i]) if value is not None: ymd.append(value) assert mstridx == -1 mstridx = len(ymd)-1 else: return None i += 1 if i < len_l and l[i] == sep: # We have three members i += 1 value = info.month(l[i]) if value is not None: ymd.append(value) mstridx = len(ymd)-1 assert mstridx == -1 else: ymd.append(int(l[i])) i += 1 elif i >= len_l or info.jump(l[i]): if i+1 < len_l and info.ampm(l[i+1]) is not None: # 12 am res.hour = int(value) if res.hour < 12 and info.ampm(l[i+1]) == 1: res.hour += 12 elif res.hour == 12 and info.ampm(l[i+1]) == 0: res.hour = 0 i += 1 else: # Year, month or day ymd.append(int(value)) i += 1 elif info.ampm(l[i]) is not None: # 12am res.hour = int(value) if res.hour < 12 and info.ampm(l[i]) == 1: res.hour += 12 elif res.hour == 12 and info.ampm(l[i]) == 0: res.hour = 0 i += 1 elif not fuzzy: return None else: i += 1 continue # Check weekday value = info.weekday(l[i]) if value is not None: res.weekday = value i += 1 continue # Check month name value = info.month(l[i]) if value is not None: ymd.append(value) assert mstridx == -1 mstridx = len(ymd)-1 i += 1 if i < len_l: if l[i] in ('-', '/'): # Jan-01[-99] sep = l[i] i += 1 ymd.append(int(l[i])) i += 1 if i < len_l and l[i] == sep: # Jan-01-99 i += 1 ymd.append(int(l[i])) i += 1 elif (i+3 < len_l and l[i] == l[i+2] == ' ' and info.pertain(l[i+1])): # Jan of 01 # In this case, 01 is clearly year try: value = int(l[i+3]) except ValueError: # Wrong guess pass else: # Convert it here to become unambiguous ymd.append(info.convertyear(value)) i += 4 continue # Check am/pm value = info.ampm(l[i]) if value is not None: # If AM/PM is found and hour is not, raise a ValueError if res.hour is None: raise ValueError('No hour specified with AM or PM flag.') # If AM/PM is found, it's a 12 hour clock, so raise an error for invalid range if not 0 <= res.hour <= 12: raise ValueError('Invalid hour specified for 12-hour clock.') if value == 1 and res.hour < 12: res.hour += 12 elif value == 0 and res.hour == 12: res.hour = 0 i += 1 continue # Check for a timezone name if (res.hour is not None and len(l[i]) <= 5 and res.tzname is None and res.tzoffset is None and not [x for x in l[i] if x not in string.ascii_uppercase]): res.tzname = l[i] res.tzoffset = info.tzoffset(res.tzname) i += 1 # Check for something like GMT+3, or BRST+3. Notice # that it doesn't mean "I am 3 hours after GMT", but # "my time +3 is GMT". If found, we reverse the # logic so that timezone parsing code will get it # right. if i < len_l and l[i] in ('+', '-'): l[i] = ('+', '-')[l[i] == '+'] res.tzoffset = None if info.utczone(res.tzname): # With something like GMT+3, the timezone # is *not* GMT. res.tzname = None continue # Check for a numbered timezone if res.hour is not None and l[i] in ('+', '-'): signal = (-1, 1)[l[i] == '+'] i += 1 len_li = len(l[i]) if len_li == 4: # -0300 res.tzoffset = int(l[i][:2])*3600+int(l[i][2:])*60 elif i+1 < len_l and l[i+1] == ':': # -03:00 res.tzoffset = int(l[i])*3600+int(l[i+2])*60 i += 2 elif len_li <= 2: # -[0]3 res.tzoffset = int(l[i][:2])*3600 else: return None i += 1 res.tzoffset *= signal # Look for a timezone name between parenthesis if (i+3 < len_l and info.jump(l[i]) and l[i+1] == '(' and l[i+3] == ')' and 3 <= len(l[i+2]) <= 5 and not [x for x in l[i+2] if x not in string.ascii_uppercase]): # -0300 (BRST) res.tzname = l[i+2] i += 4 continue # Check jumps if not (info.jump(l[i]) or fuzzy): return None if last_skipped_token_i == i - 1: # recombine the tokens skipped_tokens[-1] += l[i] else: # just append skipped_tokens.append(l[i]) last_skipped_token_i = i i += 1 # Process year/month/day len_ymd = len(ymd) if len_ymd > 3: # More than three members!? return None elif len_ymd == 1 or (mstridx != -1 and len_ymd == 2): # One member, or two members with a month string if mstridx != -1: res.month = ymd[mstridx] del ymd[mstridx] if len_ymd > 1 or mstridx == -1: if ymd[0] > 31: res.year = ymd[0] else: res.day = ymd[0] elif len_ymd == 2: # Two members with numbers if ymd[0] > 31: # 99-01 res.year, res.month = ymd elif ymd[1] > 31: # 01-99 res.month, res.year = ymd elif dayfirst and ymd[1] <= 12: # 13-01 res.day, res.month = ymd else: # 01-13 res.month, res.day = ymd elif len_ymd == 3: # Three members if mstridx == 0: res.month, res.day, res.year = ymd elif mstridx == 1: if ymd[0] > 31 or (yearfirst and ymd[2] <= 31): # 99-Jan-01 res.year, res.month, res.day = ymd else: # 01-Jan-01 # Give precendence to day-first, since # two-digit years is usually hand-written. res.day, res.month, res.year = ymd elif mstridx == 2: # WTF!? if ymd[1] > 31: # 01-99-Jan res.day, res.year, res.month = ymd else: # 99-01-Jan res.year, res.day, res.month = ymd else: if ymd[0] > 31 or \ (yearfirst and ymd[1] <= 12 and ymd[2] <= 31): # 99-01-01 res.year, res.month, res.day = ymd elif ymd[0] > 12 or (dayfirst and ymd[1] <= 12): # 13-01-01 res.day, res.month, res.year = ymd else: # 01-13-01 res.month, res.day, res.year = ymd except (IndexError, ValueError, AssertionError): return None if not info.validate(res): return None if fuzzy_with_tokens: return res, tuple(skipped_tokens) else: return res DEFAULTPARSER = parser()
[docs]def parse(timestr, parserinfo=None, **kwargs): """ Parse a string in one of the supported formats, using the `parserinfo` parameters. :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 `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: Whether or not to ignore the time zone (boolean). :param tzinfos: A time zone, to be applied to the date, if `ignoretz` is `True`. This can be either a subclass of `tzinfo`, a time zone string or an integer offset. :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 `datetime.datetime` datetimestamp and the second element is a tuple containing the portions of the string which were ignored, e.g. "Today is January 1, 2047 at 8:21:00AM" should return `(datetime.datetime(2011, 1, 1, 8, 21), (u'Today is ', u' ', u'at '))` """ # Python 2.x support: datetimes return their string presentation as # bytes in 2.x and unicode in 3.x, so it's reasonable to expect that # the parser will get both kinds. Internally we use unicode only. if isinstance(timestr, binary_type): timestr = timestr.decode() if parserinfo: return parser(parserinfo).parse(timestr, **kwargs) else: return DEFAULTPARSER.parse(timestr, **kwargs)
class _tzparser(object): class _result(_resultbase): __slots__ = ["stdabbr", "stdoffset", "dstabbr", "dstoffset", "start", "end"] class _attr(_resultbase): __slots__ = ["month", "week", "weekday", "yday", "jyday", "day", "time"] def __repr__(self): return self._repr("") def __init__(self): _resultbase.__init__(self) self.start = self._attr() self.end = self._attr() def parse(self, tzstr): res = self._result() l = _timelex.split(tzstr) try: len_l = len(l) i = 0 while i < len_l: # BRST+3[BRDT[+2]] j = i while j < len_l and not [x for x in l[j] if x in "0123456789:,-+"]: j += 1 if j != i: if not res.stdabbr: offattr = "stdoffset" res.stdabbr = "".join(l[i:j]) else: offattr = "dstoffset" res.dstabbr = "".join(l[i:j]) i = j if (i < len_l and (l[i] in ('+', '-') or l[i][0] in "0123456789")): if l[i] in ('+', '-'): # Yes, that's right. See the TZ variable # documentation. signal = (1, -1)[l[i] == '+'] i += 1 else: signal = -1 len_li = len(l[i]) if len_li == 4: # -0300 setattr(res, offattr, (int(l[i][:2])*3600 + int(l[i][2:])*60)*signal) elif i+1 < len_l and l[i+1] == ':': # -03:00 setattr(res, offattr, (int(l[i])*3600+int(l[i+2])*60)*signal) i += 2 elif len_li <= 2: # -[0]3 setattr(res, offattr, int(l[i][:2])*3600*signal) else: return None i += 1 if res.dstabbr: break else: break if i < len_l: for j in range(i, len_l): if l[j] == ';': l[j] = ',' assert l[i] == ',' i += 1 if i >= len_l: pass elif (8 <= l.count(',') <= 9 and not [y for x in l[i:] if x != ',' for y in x if y not in "0123456789"]): # GMT0BST,3,0,30,3600,10,0,26,7200[,3600] for x in (res.start, res.end): x.month = int(l[i]) i += 2 if l[i] == '-': value = int(l[i+1])*-1 i += 1 else: value = int(l[i]) i += 2 if value: x.week = value x.weekday = (int(l[i])-1) % 7 else: x.day = int(l[i]) i += 2 x.time = int(l[i]) i += 2 if i < len_l: if l[i] in ('-', '+'): signal = (-1, 1)[l[i] == "+"] i += 1 else: signal = 1 res.dstoffset = (res.stdoffset+int(l[i]))*signal elif (l.count(',') == 2 and l[i:].count('/') <= 2 and not [y for x in l[i:] if x not in (',', '/', 'J', 'M', '.', '-', ':') for y in x if y not in "0123456789"]): for x in (res.start, res.end): if l[i] == 'J': # non-leap year day (1 based) i += 1 x.jyday = int(l[i]) elif l[i] == 'M': # month[-.]week[-.]weekday i += 1 x.month = int(l[i]) i += 1 assert l[i] in ('-', '.') i += 1 x.week = int(l[i]) if x.week == 5: x.week = -1 i += 1 assert l[i] in ('-', '.') i += 1 x.weekday = (int(l[i])-1) % 7 else: # year day (zero based) x.yday = int(l[i])+1 i += 1 if i < len_l and l[i] == '/': i += 1 # start time len_li = len(l[i]) if len_li == 4: # -0300 x.time = (int(l[i][:2])*3600+int(l[i][2:])*60) elif i+1 < len_l and l[i+1] == ':': # -03:00 x.time = int(l[i])*3600+int(l[i+2])*60 i += 2 if i+1 < len_l and l[i+1] == ':': i += 2 x.time += int(l[i]) elif len_li <= 2: # -[0]3 x.time = (int(l[i][:2])*3600) else: return None i += 1 assert i == len_l or l[i] == ',' i += 1 assert i >= len_l except (IndexError, ValueError, AssertionError): return None return res DEFAULTTZPARSER = _tzparser() def _parsetz(tzstr): return DEFAULTTZPARSER.parse(tzstr) def _parsems(value): """Parse a I[.F] seconds value into (seconds, microseconds).""" if "." not in value: return int(value), 0 else: i, f = value.split(".") return int(i), int(f.ljust(6, "0")[:6]) # vim:ts=4:sw=4:et