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# -*- coding: utf-8 -*- """ 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>`_ """ from __future__ import unicode_literals import datetime import string import time import collections import re from io import StringIO from calendar import monthrange from six import text_type, binary_type, integer_types from . import relativedelta from . import tz __all__ = ["parse", "parserinfo"] class _timelex(object): # Fractional seconds are sometimes split by a comma _split_decimal = re.compile("([.,])") def __init__(self, instream): if isinstance(instream, binary_type): instream = instream.decode() if isinstance(instream, text_type): instream = StringIO(instream) if getattr(instream, 'read', None) is None: raise TypeError('Parser must be a string or character stream, not ' '{itype}'.format(itype=instream.__class__.__name__)) self.instream = instream 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 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 self.isword(nextchar): state = 'a' elif self.isnum(nextchar): state = '0' elif self.isspace(nextchar): 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 self.isword(nextchar): 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 self.isnum(nextchar): token += nextchar elif nextchar == '.' or (nextchar == ',' and len(token) >= 2): 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 self.isword(nextchar): token += nextchar elif self.isnum(nextchar) 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 self.isnum(nextchar): token += nextchar elif self.isword(nextchar) 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] in '.,')): l = self._split_decimal.split(token) token = l[0] for tok in l[1:]: if tok: self.tokenstack.append(tok) if state == '0.' and token.count('.') == 0: token = token.replace(',', '.') 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 @classmethod def split(cls, s): return list(cls(s)) @classmethod def isword(cls, nextchar): """ Whether or not the next character is part of a word """ return nextchar.isalpha() @classmethod def isnum(cls, nextchar): """ Whether the next character is part of a number """ return nextchar.isdigit() @classmethod def isspace(cls, nextchar): """ Whether the next character is whitespace """ return nextchar.isspace() 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 __len__(self): return (sum(getattr(self, attr) is not None for attr in self.__slots__)) def __repr__(self): return self._repr(self.__class__.__name__) 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 def jump(self, name): return name.lower() in self._jump def weekday(self, name): if len(name) >= min(len(n) for n in self._weekdays.keys()): try: return self._weekdays[name.lower()] except KeyError: pass return None def month(self, name): if len(name) >= min(len(n) for n in self._months.keys()): try: return self._months[name.lower()] + 1 except KeyError: pass return None def hms(self, name): try: return self._hms[name.lower()] except KeyError: return None def ampm(self, name): try: return self._ampm[name.lower()] except KeyError: return None def pertain(self, name): return name.lower() in self._pertain def utczone(self, name): return name.lower() in self._utczone def tzoffset(self, name): if name in self._utczone: return 0 return self.TZOFFSET.get(name) def convertyear(self, year, century_specified=False): if year < 100 and not century_specified: year += self._century if abs(year - self._year) >= 50: if year < self._year: year += 100 else: year -= 100 return year def validate(self, res): # move to info if res.year is not None: res.year = self.convertyear(res.year, res.century_specified) 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 _ymd(list): def __init__(self, tzstr, *args, **kwargs): super(self.__class__, self).__init__(*args, **kwargs) self.century_specified = False self.tzstr = tzstr @staticmethod def token_could_be_year(token, year): try: return int(token) == year except ValueError: return False @staticmethod def find_potential_year_tokens(year, tokens): return [token for token in tokens if _ymd.token_could_be_year(token, year)] def find_probable_year_index(self, tokens): """ attempt to deduce if a pre 100 year was lost due to padded zeros being taken off """ for index, token in enumerate(self): potential_year_tokens = _ymd.find_potential_year_tokens(token, tokens) if len(potential_year_tokens) == 1 and len(potential_year_tokens[0]) > 2: return index def append(self, val): if hasattr(val, '__len__'): if val.isdigit() and len(val) > 2: self.century_specified = True elif val > 100: self.century_specified = True super(self.__class__, self).append(int(val)) def resolve_ymd(self, mstridx, yearfirst, dayfirst): len_ymd = len(self) year, month, day = (None, None, None) if len_ymd > 3: raise ValueError("More than three YMD values") elif len_ymd == 1 or (mstridx != -1 and len_ymd == 2): # One member, or two members with a month string if mstridx != -1: month = self[mstridx] del self[mstridx] if len_ymd > 1 or mstridx == -1: if self[0] > 31: year = self[0] else: day = self[0] elif len_ymd == 2: # Two members with numbers if self[0] > 31: # 99-01 year, month = self elif self[1] > 31: # 01-99 month, year = self elif dayfirst and self[1] <= 12: # 13-01 day, month = self else: # 01-13 month, day = self elif len_ymd == 3: # Three members if mstridx == 0: month, day, year = self elif mstridx == 1: if self[0] > 31 or (yearfirst and self[2] <= 31): # 99-Jan-01 year, month, day = self else: # 01-Jan-01 # Give precendence to day-first, since # two-digit years is usually hand-written. day, month, year = self elif mstridx == 2: # WTF!? if self[1] > 31: # 01-99-Jan day, year, month = self else: # 99-01-Jan year, day, month = self else: if self[0] > 31 or \ self.find_probable_year_index(_timelex.split(self.tzstr)) == 0 or \ (yearfirst and self[1] <= 12 and self[2] <= 31): # 99-01-01 if dayfirst and self[2] <= 12: year, day, month = self else: year, month, day = self elif self[0] > 12 or (dayfirst and self[1] <= 12): # 13-01-01 day, month, year = self else: # 01-13-01 month, day, year = self return year, month, day 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 :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. """ if default is None: default = datetime.datetime.now().replace(hour=0, minute=0, second=0, microsecond=0) res, skipped_tokens = self._parse(timestr, **kwargs) if res is None: raise ValueError("Unknown string format") if len(res) == 0: raise ValueError("String does not contain a date.") repl = {} for attr in ("year", "month", "day", "hour", "minute", "second", "microsecond"): value = getattr(res, attr) if value is not None: repl[attr] = value if 'day' not in repl: # If the default day exceeds the last day of the month, fall back to # the end of the month. cyear = default.year if res.year is None else res.year cmonth = default.month if res.month is None else res.month cday = default.day if res.day is None else res.day if cday > monthrange(cyear, cmonth)[1]: repl['day'] = monthrange(cyear, cmonth)[1] 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", "ampm"] 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 :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 ')) """ 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 = _ymd(timestr) # 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(s[:2]) ymd.append(s[2:4]) ymd.append(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 in (8, 12, 14): # YYYYMMDD s = l[i-1] ymd.append(s[:4]) ymd.append(s[4:6]) ymd.append(s[6:8]) if len_li > 8: res.hour = int(s[8:10]) res.minute = int(s[10:12]) if len_li > 12: 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]) if idx == 0: # h res.minute = int(value) sec_remainder = value % 1 if sec_remainder: res.second = int(60 * sec_remainder) elif idx == 1: # m res.second, res.microsecond = \ _parsems(value_repr) # We don't need to advance the tokens here because the # i == len_l call indicates that we're looking at all # the tokens already. 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(value_repr) i += 1 if i < len_l and not info.jump(l[i]): try: # 01-01[-01] ymd.append(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, 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(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(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, 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(l[i]) i += 1 if i < len_l and l[i] == sep: # Jan-01-99 i += 1 ymd.append(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(str(info.convertyear(value))) i += 4 continue # Check am/pm value = info.ampm(l[i]) if value is not None: # For fuzzy parsing, 'a' or 'am' (both valid English words) # may erroneously trigger the AM/PM flag. Deal with that # here. val_is_ampm = True # If there's already an AM/PM flag, this one isn't one. if fuzzy and res.ampm is not None: val_is_ampm = False # If AM/PM is found and hour is not, raise a ValueError if res.hour is None: if fuzzy: val_is_ampm = False else: raise ValueError('No hour specified with ' + 'AM or PM flag.') elif not 0 <= res.hour <= 12: # If AM/PM is found, it's a 12 hour clock, so raise # an error for invalid range if fuzzy: val_is_ampm = False else: raise ValueError('Invalid hour specified for ' + '12-hour clock.') if val_is_ampm: if value == 1 and res.hour < 12: res.hour += 12 elif value == 0 and res.hour == 12: res.hour = 0 res.ampm = value elif fuzzy: last_skipped_token_i = self._skip_token(skipped_tokens, last_skipped_token_i, i, l) 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, 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, None last_skipped_token_i = self._skip_token(skipped_tokens, last_skipped_token_i, i, l) i += 1 # Process year/month/day year, month, day = ymd.resolve_ymd(mstridx, yearfirst, dayfirst) if year is not None: res.year = year res.century_specified = ymd.century_specified if month is not None: res.month = month if day is not None: res.day = day except (IndexError, ValueError, AssertionError): return None, None if not info.validate(res): return None, None if fuzzy_with_tokens: return res, tuple(skipped_tokens) else: return res, None @staticmethod def _skip_token(skipped_tokens, last_skipped_token_i, i, l): 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 return last_skipped_token_i DEFAULTPARSER = parser() 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 :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: 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 ')) :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: Raised if the parsed date exceeds the largest valid C integer on your system. """ 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