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''' datetime.tzinfo timezone definitions generated from the Olson timezone database: ftp://elsie.nci.nih.gov/pub/tz*.tar.gz See the datetime section of the Python Library Reference for information on how to use these modules. ''' import sys import datetime import os.path import pathlib import re import zoneinfo from pytz.exceptions import AmbiguousTimeError from pytz.exceptions import InvalidTimeError from pytz.exceptions import NonExistentTimeError from pytz.exceptions import UnknownTimeZoneError from pytz.lazy import LazyDict, LazyList, LazySet # noqa from pytz.tzinfo import unpickler, BaseTzInfo from pytz.tzfile import build_tzinfo def _read_olson_version() -> str: tzdata_zi = pathlib.Path("/usr/share/zoneinfo/tzdata.zi") with tzdata_zi.open(encoding="utf-8") as tzdata_zi_file: line = tzdata_zi_file.readline() match = re.match(r"^#\s*version\s*([0-9a-z]*)\s*$", line) if not match: return "unknown" return match.group(1) # The IANA (nee Olson) database is updated several times a year. OLSON_VERSION = _read_olson_version() VERSION = '2024.1' # pip compatible version number. __version__ = VERSION OLSEN_VERSION = OLSON_VERSION # Old releases had this misspelling __all__ = [ 'timezone', 'utc', 'country_timezones', 'country_names', 'AmbiguousTimeError', 'InvalidTimeError', 'NonExistentTimeError', 'UnknownTimeZoneError', 'all_timezones', 'all_timezones_set', 'common_timezones', 'common_timezones_set', 'BaseTzInfo', 'FixedOffset', ] if sys.version_info[0] > 2: # Python 3.x # Python 3.x doesn't have unicode(), making writing code # for Python 2.3 and Python 3.x a pain. unicode = str def ascii(s): r""" >>> ascii('Hello') 'Hello' >>> ascii('\N{TRADE MARK SIGN}') #doctest: +IGNORE_EXCEPTION_DETAIL Traceback (most recent call last): ... UnicodeEncodeError: ... """ if type(s) == bytes: s = s.decode('ASCII') else: s.encode('ASCII') # Raise an exception if not ASCII return s # But the string - not a byte string. else: # Python 2.x def ascii(s): r""" >>> ascii('Hello') 'Hello' >>> ascii(u'Hello') 'Hello' >>> ascii(u'\N{TRADE MARK SIGN}') #doctest: +IGNORE_EXCEPTION_DETAIL Traceback (most recent call last): ... UnicodeEncodeError: ... """ return s.encode('ASCII') def open_resource(name): """Open a resource from the zoneinfo subdir for reading. Uses the pkg_resources module if available and no standard file found at the calculated location. It is possible to specify different location for zoneinfo subdir by using the PYTZ_TZDATADIR environment variable. """ name_parts = name.lstrip('/').split('/') for part in name_parts: if part == os.path.pardir or os.sep in part: raise ValueError('Bad path segment: %r' % part) zoneinfo_dir = os.environ.get('PYTZ_TZDATADIR', None) if zoneinfo_dir is not None: filename = os.path.join(zoneinfo_dir, *name_parts) else: filename = os.path.join('/usr','share', 'zoneinfo', *name_parts) if not os.path.exists(filename): # http://bugs.launchpad.net/bugs/383171 - we avoid using this # unless absolutely necessary to help when a broken version of # pkg_resources is installed. try: from pkg_resources import resource_stream except ImportError: resource_stream = None if resource_stream is not None: return resource_stream(__name__, 'zoneinfo/' + name) return open(filename, 'rb') def resource_exists(name): """Return true if the given resource exists""" try: if os.environ.get('PYTZ_SKIPEXISTSCHECK', ''): # In "standard" distributions, we can assume that # all the listed timezones are present. As an # import-speed optimization, you can set the # PYTZ_SKIPEXISTSCHECK flag to skip checking # for the presence of the resource file on disk. return True open_resource(name).close() return True except IOError: return False _tzinfo_cache = {} def timezone(zone): r''' Return a datetime.tzinfo implementation for the given timezone >>> from datetime import datetime, timedelta >>> utc = timezone('UTC') >>> eastern = timezone('US/Eastern') >>> eastern.zone 'US/Eastern' >>> timezone(unicode('US/Eastern')) is eastern True >>> utc_dt = datetime(2002, 10, 27, 6, 0, 0, tzinfo=utc) >>> loc_dt = utc_dt.astimezone(eastern) >>> fmt = '%Y-%m-%d %H:%M:%S %Z (%z)' >>> loc_dt.strftime(fmt) '2002-10-27 01:00:00 EST (-0500)' >>> (loc_dt - timedelta(minutes=10)).strftime(fmt) '2002-10-27 00:50:00 EST (-0500)' >>> eastern.normalize(loc_dt - timedelta(minutes=10)).strftime(fmt) '2002-10-27 01:50:00 EDT (-0400)' >>> (loc_dt + timedelta(minutes=10)).strftime(fmt) '2002-10-27 01:10:00 EST (-0500)' Raises UnknownTimeZoneError if passed an unknown zone. >>> try: ... timezone('Asia/Shangri-La') ... except UnknownTimeZoneError: ... print('Unknown') Unknown >>> try: ... timezone(unicode('\N{TRADE MARK SIGN}')) ... except UnknownTimeZoneError: ... print('Unknown') Unknown ''' if zone is None: raise UnknownTimeZoneError(None) if zone.upper() == 'UTC': return utc try: zone = ascii(zone) except UnicodeEncodeError: # All valid timezones are ASCII raise UnknownTimeZoneError(zone) zone = _case_insensitive_zone_lookup(_unmunge_zone(zone)) if zone not in _tzinfo_cache: if zone in all_timezones_set: # noqa fp = open_resource(zone) try: _tzinfo_cache[zone] = build_tzinfo(zone, fp) finally: fp.close() else: raise UnknownTimeZoneError(zone) return _tzinfo_cache[zone] def _unmunge_zone(zone): """Undo the time zone name munging done by older versions of pytz.""" return zone.replace('_plus_', '+').replace('_minus_', '-') _all_timezones_lower_to_standard = None def _case_insensitive_zone_lookup(zone): """case-insensitively matching timezone, else return zone unchanged""" global _all_timezones_lower_to_standard if _all_timezones_lower_to_standard is None: _all_timezones_lower_to_standard = dict((tz.lower(), tz) for tz in all_timezones) # noqa return _all_timezones_lower_to_standard.get(zone.lower()) or zone # noqa ZERO = datetime.timedelta(0) HOUR = datetime.timedelta(hours=1) class UTC(BaseTzInfo): """UTC Optimized UTC implementation. It unpickles using the single module global instance defined beneath this class declaration. """ zone = "UTC" _utcoffset = ZERO _dst = ZERO _tzname = zone def fromutc(self, dt): if dt.tzinfo is None: return self.localize(dt) return super(utc.__class__, self).fromutc(dt) def utcoffset(self, dt): return ZERO def tzname(self, dt): return "UTC" def dst(self, dt): return ZERO def __reduce__(self): return _UTC, () def localize(self, dt, is_dst=False): '''Convert naive time to local time''' if dt.tzinfo is not None: raise ValueError('Not naive datetime (tzinfo is already set)') return dt.replace(tzinfo=self) def normalize(self, dt, is_dst=False): '''Correct the timezone information on the given datetime''' if dt.tzinfo is self: return dt if dt.tzinfo is None: raise ValueError('Naive time - no tzinfo set') return dt.astimezone(self) def __repr__(self): return "<UTC>" def __str__(self): return "UTC" UTC = utc = UTC() # UTC is a singleton def _UTC(): """Factory function for utc unpickling. Makes sure that unpickling a utc instance always returns the same module global. These examples belong in the UTC class above, but it is obscured; or in the README.rst, but we are not depending on Python 2.4 so integrating the README.rst examples with the unit tests is not trivial. >>> import datetime, pickle >>> dt = datetime.datetime(2005, 3, 1, 14, 13, 21, tzinfo=utc) >>> naive = dt.replace(tzinfo=None) >>> p = pickle.dumps(dt, 1) >>> naive_p = pickle.dumps(naive, 1) >>> len(p) - len(naive_p) 17 >>> new = pickle.loads(p) >>> new == dt True >>> new is dt False >>> new.tzinfo is dt.tzinfo True >>> utc is UTC is timezone('UTC') True >>> utc is timezone('GMT') False """ return utc _UTC.__safe_for_unpickling__ = True def _p(*args): """Factory function for unpickling pytz tzinfo instances. Just a wrapper around tzinfo.unpickler to save a few bytes in each pickle by shortening the path. """ return unpickler(*args) _p.__safe_for_unpickling__ = True class _CountryTimezoneDict(LazyDict): """Map ISO 3166 country code to a list of timezone names commonly used in that country. iso3166_code is the two letter code used to identify the country. >>> def print_list(list_of_strings): ... 'We use a helper so doctests work under Python 2.3 -> 3.x' ... for s in list_of_strings: ... print(s) >>> print_list(country_timezones['nz']) Pacific/Auckland Pacific/Chatham >>> print_list(country_timezones['ch']) Europe/Zurich >>> print_list(country_timezones['CH']) Europe/Zurich >>> print_list(country_timezones[unicode('ch')]) Europe/Zurich >>> print_list(country_timezones['XXX']) Traceback (most recent call last): ... KeyError: 'XXX' Previously, this information was exposed as a function rather than a dictionary. This is still supported:: >>> print_list(country_timezones('nz')) Pacific/Auckland Pacific/Chatham """ def __call__(self, iso3166_code): """Backwards compatibility.""" return self[iso3166_code] def _fill(self): data = {} zone_tab = open_resource('zone.tab') try: for line in zone_tab: line = line.decode('UTF-8') if line.startswith('#'): continue code, coordinates, zone = line.split(None, 4)[:3] if zone not in all_timezones_set: # noqa continue try: data[code].append(zone) except KeyError: data[code] = [zone] self.data = data finally: zone_tab.close() country_timezones = _CountryTimezoneDict() class _CountryNameDict(LazyDict): '''Dictionary proving ISO3166 code -> English name. >>> print(country_names['au']) Australia ''' def _fill(self): data = {} zone_tab = open_resource('iso3166.tab') try: for line in zone_tab.readlines(): line = line.decode('UTF-8') if line.startswith('#'): continue code, name = line.split(None, 1) data[code] = name.strip() self.data = data finally: zone_tab.close() country_names = _CountryNameDict() # Time-zone info based solely on fixed offsets class _FixedOffset(datetime.tzinfo): zone = None # to match the standard pytz API def __init__(self, minutes): if abs(minutes) >= 1440: raise ValueError("absolute offset is too large", minutes) self._minutes = minutes self._offset = datetime.timedelta(minutes=minutes) def utcoffset(self, dt): return self._offset def __reduce__(self): return FixedOffset, (self._minutes, ) def dst(self, dt): return ZERO def tzname(self, dt): return None def __repr__(self): return 'pytz.FixedOffset(%d)' % self._minutes def localize(self, dt, is_dst=False): '''Convert naive time to local time''' if dt.tzinfo is not None: raise ValueError('Not naive datetime (tzinfo is already set)') return dt.replace(tzinfo=self) def normalize(self, dt, is_dst=False): '''Correct the timezone information on the given datetime''' if dt.tzinfo is self: return dt if dt.tzinfo is None: raise ValueError('Naive time - no tzinfo set') return dt.astimezone(self) def FixedOffset(offset, _tzinfos={}): """return a fixed-offset timezone based off a number of minutes. >>> one = FixedOffset(-330) >>> one pytz.FixedOffset(-330) >>> str(one.utcoffset(datetime.datetime.now())) '-1 day, 18:30:00' >>> str(one.dst(datetime.datetime.now())) '0:00:00' >>> two = FixedOffset(1380) >>> two pytz.FixedOffset(1380) >>> str(two.utcoffset(datetime.datetime.now())) '23:00:00' >>> str(two.dst(datetime.datetime.now())) '0:00:00' The datetime.timedelta must be between the range of -1 and 1 day, non-inclusive. >>> FixedOffset(1440) Traceback (most recent call last): ... ValueError: ('absolute offset is too large', 1440) >>> FixedOffset(-1440) Traceback (most recent call last): ... ValueError: ('absolute offset is too large', -1440) An offset of 0 is special-cased to return UTC. >>> FixedOffset(0) is UTC True There should always be only one instance of a FixedOffset per timedelta. This should be true for multiple creation calls. >>> FixedOffset(-330) is one True >>> FixedOffset(1380) is two True It should also be true for pickling. >>> import pickle >>> pickle.loads(pickle.dumps(one)) is one True >>> pickle.loads(pickle.dumps(two)) is two True """ if offset == 0: return UTC info = _tzinfos.get(offset) if info is None: # We haven't seen this one before. we need to save it. # Use setdefault to avoid a race condition and make sure we have # only one info = _tzinfos.setdefault(offset, _FixedOffset(offset)) return info FixedOffset.__safe_for_unpickling__ = True def _test(): import doctest sys.path.insert(0, os.pardir) import pytz return doctest.testmod(pytz) def _read_timezones_from_zone_tab() -> set[str]: timezones = set() zone_tab = pathlib.Path("/usr/share/zoneinfo/zone1970.tab") for line in zone_tab.read_text(encoding="utf-8").splitlines(): if line.startswith("#"): continue timezones.add(line.split("\t")[2]) return timezones if __name__ == '__main__': _test() _extra_common_timezones_set = { 'Africa/Accra', 'Africa/Addis_Ababa', 'Africa/Asmara', 'Africa/Bamako', 'Africa/Bangui', 'Africa/Banjul', 'Africa/Blantyre', 'Africa/Brazzaville', 'Africa/Bujumbura', 'Africa/Conakry', 'Africa/Dakar', 'Africa/Dar_es_Salaam', 'Africa/Djibouti', 'Africa/Douala', 'Africa/Freetown', 'Africa/Gaborone', 'Africa/Harare', 'Africa/Kampala', 'Africa/Kigali', 'Africa/Kinshasa', 'Africa/Libreville', 'Africa/Lome', 'Africa/Luanda', 'Africa/Lubumbashi', 'Africa/Lusaka', 'Africa/Malabo', 'Africa/Maseru', 'Africa/Mbabane', 'Africa/Mogadishu', 'Africa/Niamey', 'Africa/Nouakchott', 'Africa/Ouagadougou', 'Africa/Porto-Novo', 'America/Anguilla', 'America/Antigua', 'America/Aruba', 'America/Atikokan', 'America/Blanc-Sablon', 'America/Cayman', 'America/Creston', 'America/Curacao', 'America/Dominica', 'America/Grenada', 'America/Guadeloupe', 'America/Kralendijk', 'America/Lower_Princes', 'America/Marigot', 'America/Montserrat', 'America/Nassau', 'America/Port_of_Spain', 'America/St_Barthelemy', 'America/St_Kitts', 'America/St_Lucia', 'America/St_Thomas', 'America/St_Vincent', 'America/Tortola', 'Antarctica/DumontDUrville', 'Antarctica/McMurdo', 'Antarctica/Syowa', 'Antarctica/Vostok', 'Arctic/Longyearbyen', 'Asia/Aden', 'Asia/Bahrain', 'Asia/Kuala_Lumpur', 'Asia/Kuwait', 'Asia/Muscat', 'Asia/Phnom_Penh', 'Asia/Vientiane', 'Atlantic/Reykjavik', 'Atlantic/St_Helena', 'Canada/Atlantic', 'Canada/Central', 'Canada/Eastern', 'Canada/Mountain', 'Canada/Newfoundland', 'Canada/Pacific', 'Europe/Amsterdam', 'Europe/Bratislava', 'Europe/Busingen', 'Europe/Copenhagen', 'Europe/Guernsey', 'Europe/Isle_of_Man', 'Europe/Jersey', 'Europe/Ljubljana', 'Europe/Luxembourg', 'Europe/Mariehamn', 'Europe/Monaco', 'Europe/Oslo', 'Europe/Podgorica', 'Europe/San_Marino', 'Europe/Sarajevo', 'Europe/Skopje', 'Europe/Stockholm', 'Europe/Vaduz', 'Europe/Vatican', 'Europe/Zagreb', 'GMT', 'Indian/Antananarivo', 'Indian/Christmas', 'Indian/Cocos', 'Indian/Comoro', 'Indian/Kerguelen', 'Indian/Mahe', 'Indian/Mayotte', 'Indian/Reunion', 'Pacific/Chuuk', 'Pacific/Funafuti', 'Pacific/Majuro', 'Pacific/Midway', 'Pacific/Pohnpei', 'Pacific/Saipan', 'Pacific/Wake', 'Pacific/Wallis', 'US/Alaska', 'US/Arizona', 'US/Central', 'US/Eastern', 'US/Hawaii', 'US/Mountain', 'US/Pacific', 'UTC'} all_timezones_set = zoneinfo.available_timezones() - {"Factory", "localtime"} common_timezones_set = (_read_timezones_from_zone_tab() | _extra_common_timezones_set) & all_timezones_set all_timezones = sorted(all_timezones_set) common_timezones = sorted(common_timezones_set)