Source code for dateutil.tz

# -*- coding: utf-8 -*-
"""
This module offers timezone implementations subclassing the abstract
:py:`datetime.tzinfo` type. There are classes to handle tzfile format files
(usually are in :file:`/etc/localtime`, :file:`/usr/share/zoneinfo`, etc), TZ
environment string (in all known formats), given ranges (with help from
relative deltas), local machine timezone, fixed offset timezone, and UTC
timezone.
"""
import datetime
import struct
import time
import sys
import os

from six import string_types, PY3

try:
    from dateutil.tzwin import tzwin, tzwinlocal
except ImportError:
    tzwin = tzwinlocal = None

relativedelta = None
parser = None
rrule = None

__all__ = ["tzutc", "tzoffset", "tzlocal", "tzfile", "tzrange",
           "tzstr", "tzical", "tzwin", "tzwinlocal", "gettz"]


def tzname_in_python2(myfunc):
    """Change unicode output into bytestrings in Python 2

    tzname() API changed in Python 3. It used to return bytes, but was changed
    to unicode strings
    """
    def inner_func(*args, **kwargs):
        if PY3:
            return myfunc(*args, **kwargs)
        else:
            return myfunc(*args, **kwargs).encode()
    return inner_func

ZERO = datetime.timedelta(0)
EPOCHORDINAL = datetime.datetime.utcfromtimestamp(0).toordinal()


[docs]class tzutc(datetime.tzinfo):
[docs] def utcoffset(self, dt): return ZERO
[docs] def dst(self, dt): return ZERO
@tzname_in_python2
[docs] def tzname(self, dt): return "UTC"
def __eq__(self, other): return (isinstance(other, tzutc) or (isinstance(other, tzoffset) and other._offset == ZERO)) def __ne__(self, other): return not self.__eq__(other) def __repr__(self): return "%s()" % self.__class__.__name__ __reduce__ = object.__reduce__
[docs]class tzoffset(datetime.tzinfo): def __init__(self, name, offset): self._name = name self._offset = datetime.timedelta(seconds=offset)
[docs] def utcoffset(self, dt): return self._offset
[docs] def dst(self, dt): return ZERO
@tzname_in_python2
[docs] def tzname(self, dt): return self._name
def __eq__(self, other): return (isinstance(other, tzoffset) and self._offset == other._offset) def __ne__(self, other): return not self.__eq__(other) def __repr__(self): return "%s(%s, %s)" % (self.__class__.__name__, repr(self._name), self._offset.days*86400+self._offset.seconds) __reduce__ = object.__reduce__
[docs]class tzlocal(datetime.tzinfo): _std_offset = datetime.timedelta(seconds=-time.timezone) if time.daylight: _dst_offset = datetime.timedelta(seconds=-time.altzone) else: _dst_offset = _std_offset
[docs] def utcoffset(self, dt): if self._isdst(dt): return self._dst_offset else: return self._std_offset
[docs] def dst(self, dt): if self._isdst(dt): return self._dst_offset-self._std_offset else: return ZERO
@tzname_in_python2
[docs] def tzname(self, dt): return time.tzname[self._isdst(dt)]
def _isdst(self, dt): # We can't use mktime here. It is unstable when deciding if # the hour near to a change is DST or not. # # timestamp = time.mktime((dt.year, dt.month, dt.day, dt.hour, # dt.minute, dt.second, dt.weekday(), 0, -1)) # return time.localtime(timestamp).tm_isdst # # The code above yields the following result: # # >>> import tz, datetime # >>> t = tz.tzlocal() # >>> datetime.datetime(2003,2,15,23,tzinfo=t).tzname() # 'BRDT' # >>> datetime.datetime(2003,2,16,0,tzinfo=t).tzname() # 'BRST' # >>> datetime.datetime(2003,2,15,23,tzinfo=t).tzname() # 'BRST' # >>> datetime.datetime(2003,2,15,22,tzinfo=t).tzname() # 'BRDT' # >>> datetime.datetime(2003,2,15,23,tzinfo=t).tzname() # 'BRDT' # # Here is a more stable implementation: # timestamp = ((dt.toordinal() - EPOCHORDINAL) * 86400 + dt.hour * 3600 + dt.minute * 60 + dt.second) return time.localtime(timestamp+time.timezone).tm_isdst def __eq__(self, other): if not isinstance(other, tzlocal): return False return (self._std_offset == other._std_offset and self._dst_offset == other._dst_offset) return True def __ne__(self, other): return not self.__eq__(other) def __repr__(self): return "%s()" % self.__class__.__name__ __reduce__ = object.__reduce__
class _ttinfo(object): __slots__ = ["offset", "delta", "isdst", "abbr", "isstd", "isgmt"] def __init__(self): for attr in self.__slots__: setattr(self, attr, None) def __repr__(self): 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)" % (self.__class__.__name__, ", ".join(l)) def __eq__(self, other): if not isinstance(other, _ttinfo): return False return (self.offset == other.offset and self.delta == other.delta and self.isdst == other.isdst and self.abbr == other.abbr and self.isstd == other.isstd and self.isgmt == other.isgmt) def __ne__(self, other): return not self.__eq__(other) def __getstate__(self): state = {} for name in self.__slots__: state[name] = getattr(self, name, None) return state def __setstate__(self, state): for name in self.__slots__: if name in state: setattr(self, name, state[name])
[docs]class tzfile(datetime.tzinfo): # http://www.twinsun.com/tz/tz-link.htm # ftp://ftp.iana.org/tz/tz*.tar.gz def __init__(self, fileobj, filename=None): file_opened_here = False if isinstance(fileobj, string_types): self._filename = fileobj fileobj = open(fileobj, 'rb') file_opened_here = True elif filename is not None: self._filename = filename elif hasattr(fileobj, "name"): self._filename = fileobj.name else: self._filename = repr(fileobj) # From tzfile(5): # # The time zone information files used by tzset(3) # begin with the magic characters "TZif" to identify # them as time zone information files, followed by # sixteen bytes reserved for future use, followed by # six four-byte values of type long, written in a # ``standard'' byte order (the high-order byte # of the value is written first). try: if fileobj.read(4).decode() != "TZif": raise ValueError("magic not found") fileobj.read(16) ( # The number of UTC/local indicators stored in the file. ttisgmtcnt, # The number of standard/wall indicators stored in the file. ttisstdcnt, # The number of leap seconds for which data is # stored in the file. leapcnt, # The number of "transition times" for which data # is stored in the file. timecnt, # The number of "local time types" for which data # is stored in the file (must not be zero). typecnt, # The number of characters of "time zone # abbreviation strings" stored in the file. charcnt, ) = struct.unpack(">6l", fileobj.read(24)) # The above header is followed by tzh_timecnt four-byte # values of type long, sorted in ascending order. # These values are written in ``standard'' byte order. # Each is used as a transition time (as returned by # time(2)) at which the rules for computing local time # change. if timecnt: self._trans_list = struct.unpack(">%dl" % timecnt, fileobj.read(timecnt*4)) else: self._trans_list = [] # Next come tzh_timecnt one-byte values of type unsigned # char; each one tells which of the different types of # ``local time'' types described in the file is associated # with the same-indexed transition time. These values # serve as indices into an array of ttinfo structures that # appears next in the file. if timecnt: self._trans_idx = struct.unpack(">%dB" % timecnt, fileobj.read(timecnt)) else: self._trans_idx = [] # Each ttinfo structure is written as a four-byte value # for tt_gmtoff of type long, in a standard byte # order, followed by a one-byte value for tt_isdst # and a one-byte value for tt_abbrind. In each # structure, tt_gmtoff gives the number of # seconds to be added to UTC, tt_isdst tells whether # tm_isdst should be set by localtime(3), and # tt_abbrind serves as an index into the array of # time zone abbreviation characters that follow the # ttinfo structure(s) in the file. ttinfo = [] for i in range(typecnt): ttinfo.append(struct.unpack(">lbb", fileobj.read(6))) abbr = fileobj.read(charcnt).decode() # Then there are tzh_leapcnt pairs of four-byte # values, written in standard byte order; the # first value of each pair gives the time (as # returned by time(2)) at which a leap second # occurs; the second gives the total number of # leap seconds to be applied after the given time. # The pairs of values are sorted in ascending order # by time. # Not used, for now # if leapcnt: # leap = struct.unpack(">%dl" % (leapcnt*2), # fileobj.read(leapcnt*8)) # Then there are tzh_ttisstdcnt standard/wall # indicators, each stored as a one-byte value; # they tell whether the transition times associated # with local time types were specified as standard # time or wall clock time, and are used when # a time zone file is used in handling POSIX-style # time zone environment variables. if ttisstdcnt: isstd = struct.unpack(">%db" % ttisstdcnt, fileobj.read(ttisstdcnt)) # Finally, there are tzh_ttisgmtcnt UTC/local # indicators, each stored as a one-byte value; # they tell whether the transition times associated # with local time types were specified as UTC or # local time, and are used when a time zone file # is used in handling POSIX-style time zone envi- # ronment variables. if ttisgmtcnt: isgmt = struct.unpack(">%db" % ttisgmtcnt, fileobj.read(ttisgmtcnt)) # ** Everything has been read ** finally: if file_opened_here: fileobj.close() # Build ttinfo list self._ttinfo_list = [] for i in range(typecnt): gmtoff, isdst, abbrind = ttinfo[i] # Round to full-minutes if that's not the case. Python's # datetime doesn't accept sub-minute timezones. Check # http://python.org/sf/1447945 for some information. gmtoff = (gmtoff+30)//60*60 tti = _ttinfo() tti.offset = gmtoff tti.delta = datetime.timedelta(seconds=gmtoff) tti.isdst = isdst tti.abbr = abbr[abbrind:abbr.find('\x00', abbrind)] tti.isstd = (ttisstdcnt > i and isstd[i] != 0) tti.isgmt = (ttisgmtcnt > i and isgmt[i] != 0) self._ttinfo_list.append(tti) # Replace ttinfo indexes for ttinfo objects. trans_idx = [] for idx in self._trans_idx: trans_idx.append(self._ttinfo_list[idx]) self._trans_idx = tuple(trans_idx) # Set standard, dst, and before ttinfos. before will be # used when a given time is before any transitions, # and will be set to the first non-dst ttinfo, or to # the first dst, if all of them are dst. self._ttinfo_std = None self._ttinfo_dst = None self._ttinfo_before = None if self._ttinfo_list: if not self._trans_list: self._ttinfo_std = self._ttinfo_first = self._ttinfo_list[0] else: for i in range(timecnt-1, -1, -1): tti = self._trans_idx[i] if not self._ttinfo_std and not tti.isdst: self._ttinfo_std = tti elif not self._ttinfo_dst and tti.isdst: self._ttinfo_dst = tti if self._ttinfo_std and self._ttinfo_dst: break else: if self._ttinfo_dst and not self._ttinfo_std: self._ttinfo_std = self._ttinfo_dst for tti in self._ttinfo_list: if not tti.isdst: self._ttinfo_before = tti break else: self._ttinfo_before = self._ttinfo_list[0] # Now fix transition times to become relative to wall time. # # I'm not sure about this. In my tests, the tz source file # is setup to wall time, and in the binary file isstd and # isgmt are off, so it should be in wall time. OTOH, it's # always in gmt time. Let me know if you have comments # about this. laststdoffset = 0 self._trans_list = list(self._trans_list) for i in range(len(self._trans_list)): tti = self._trans_idx[i] if not tti.isdst: # This is std time. self._trans_list[i] += tti.offset laststdoffset = tti.offset else: # This is dst time. Convert to std. self._trans_list[i] += laststdoffset self._trans_list = tuple(self._trans_list) def _find_ttinfo(self, dt, laststd=0): timestamp = ((dt.toordinal() - EPOCHORDINAL) * 86400 + dt.hour * 3600 + dt.minute * 60 + dt.second) idx = 0 for trans in self._trans_list: if timestamp < trans: break idx += 1 else: return self._ttinfo_std if idx == 0: return self._ttinfo_before if laststd: while idx > 0: tti = self._trans_idx[idx-1] if not tti.isdst: return tti idx -= 1 else: return self._ttinfo_std else: return self._trans_idx[idx-1]
[docs] def utcoffset(self, dt): if not self._ttinfo_std: return ZERO return self._find_ttinfo(dt).delta
[docs] def dst(self, dt): if not self._ttinfo_dst: return ZERO tti = self._find_ttinfo(dt) if not tti.isdst: return ZERO # The documentation says that utcoffset()-dst() must # be constant for every dt. return tti.delta-self._find_ttinfo(dt, laststd=1).delta # An alternative for that would be: # # return self._ttinfo_dst.offset-self._ttinfo_std.offset # # However, this class stores historical changes in the # dst offset, so I belive that this wouldn't be the right # way to implement this.
@tzname_in_python2
[docs] def tzname(self, dt): if not self._ttinfo_std: return None return self._find_ttinfo(dt).abbr
def __eq__(self, other): if not isinstance(other, tzfile): return False return (self._trans_list == other._trans_list and self._trans_idx == other._trans_idx and self._ttinfo_list == other._ttinfo_list) def __ne__(self, other): return not self.__eq__(other) def __repr__(self): return "%s(%s)" % (self.__class__.__name__, repr(self._filename)) def __reduce__(self): if not os.path.isfile(self._filename): raise ValueError("Unpickable %s class" % self.__class__.__name__) return (self.__class__, (self._filename,))
[docs]class tzrange(datetime.tzinfo): def __init__(self, stdabbr, stdoffset=None, dstabbr=None, dstoffset=None, start=None, end=None): global relativedelta if not relativedelta: from dateutil import relativedelta self._std_abbr = stdabbr self._dst_abbr = dstabbr if stdoffset is not None: self._std_offset = datetime.timedelta(seconds=stdoffset) else: self._std_offset = ZERO if dstoffset is not None: self._dst_offset = datetime.timedelta(seconds=dstoffset) elif dstabbr and stdoffset is not None: self._dst_offset = self._std_offset+datetime.timedelta(hours=+1) else: self._dst_offset = ZERO if dstabbr and start is None: self._start_delta = relativedelta.relativedelta( hours=+2, month=4, day=1, weekday=relativedelta.SU(+1)) else: self._start_delta = start if dstabbr and end is None: self._end_delta = relativedelta.relativedelta( hours=+1, month=10, day=31, weekday=relativedelta.SU(-1)) else: self._end_delta = end
[docs] def utcoffset(self, dt): if self._isdst(dt): return self._dst_offset else: return self._std_offset
[docs] def dst(self, dt): if self._isdst(dt): return self._dst_offset-self._std_offset else: return ZERO
@tzname_in_python2
[docs] def tzname(self, dt): if self._isdst(dt): return self._dst_abbr else: return self._std_abbr
def _isdst(self, dt): if not self._start_delta: return False year = datetime.datetime(dt.year, 1, 1) start = year+self._start_delta end = year+self._end_delta dt = dt.replace(tzinfo=None) if start < end: return dt >= start and dt < end else: return dt >= start or dt < end def __eq__(self, other): if not isinstance(other, tzrange): return False return (self._std_abbr == other._std_abbr and self._dst_abbr == other._dst_abbr and self._std_offset == other._std_offset and self._dst_offset == other._dst_offset and self._start_delta == other._start_delta and self._end_delta == other._end_delta) def __ne__(self, other): return not self.__eq__(other) def __repr__(self): return "%s(...)" % self.__class__.__name__ __reduce__ = object.__reduce__
[docs]class tzstr(tzrange): def __init__(self, s): global parser if not parser: from dateutil import parser self._s = s res = parser._parsetz(s) if res is None: raise ValueError("unknown string format") # Here we break the compatibility with the TZ variable handling. # GMT-3 actually *means* the timezone -3. if res.stdabbr in ("GMT", "UTC"): res.stdoffset *= -1 # We must initialize it first, since _delta() needs # _std_offset and _dst_offset set. Use False in start/end # to avoid building it two times. tzrange.__init__(self, res.stdabbr, res.stdoffset, res.dstabbr, res.dstoffset, start=False, end=False) if not res.dstabbr: self._start_delta = None self._end_delta = None else: self._start_delta = self._delta(res.start) if self._start_delta: self._end_delta = self._delta(res.end, isend=1) def _delta(self, x, isend=0): kwargs = {} if x.month is not None: kwargs["month"] = x.month if x.weekday is not None: kwargs["weekday"] = relativedelta.weekday(x.weekday, x.week) if x.week > 0: kwargs["day"] = 1 else: kwargs["day"] = 31 elif x.day: kwargs["day"] = x.day elif x.yday is not None: kwargs["yearday"] = x.yday elif x.jyday is not None: kwargs["nlyearday"] = x.jyday if not kwargs: # Default is to start on first sunday of april, and end # on last sunday of october. if not isend: kwargs["month"] = 4 kwargs["day"] = 1 kwargs["weekday"] = relativedelta.SU(+1) else: kwargs["month"] = 10 kwargs["day"] = 31 kwargs["weekday"] = relativedelta.SU(-1) if x.time is not None: kwargs["seconds"] = x.time else: # Default is 2AM. kwargs["seconds"] = 7200 if isend: # Convert to standard time, to follow the documented way # of working with the extra hour. See the documentation # of the tzinfo class. delta = self._dst_offset-self._std_offset kwargs["seconds"] -= delta.seconds+delta.days*86400 return relativedelta.relativedelta(**kwargs) def __repr__(self): return "%s(%s)" % (self.__class__.__name__, repr(self._s))
class _tzicalvtzcomp(object): def __init__(self, tzoffsetfrom, tzoffsetto, isdst, tzname=None, rrule=None): self.tzoffsetfrom = datetime.timedelta(seconds=tzoffsetfrom) self.tzoffsetto = datetime.timedelta(seconds=tzoffsetto) self.tzoffsetdiff = self.tzoffsetto-self.tzoffsetfrom self.isdst = isdst self.tzname = tzname self.rrule = rrule class _tzicalvtz(datetime.tzinfo): def __init__(self, tzid, comps=[]): self._tzid = tzid self._comps = comps self._cachedate = [] self._cachecomp = [] def _find_comp(self, dt): if len(self._comps) == 1: return self._comps[0] dt = dt.replace(tzinfo=None) try: return self._cachecomp[self._cachedate.index(dt)] except ValueError: pass lastcomp = None lastcompdt = None for comp in self._comps: if not comp.isdst: # Handle the extra hour in DST -> STD compdt = comp.rrule.before(dt-comp.tzoffsetdiff, inc=True) else: compdt = comp.rrule.before(dt, inc=True) if compdt and (not lastcompdt or lastcompdt < compdt): lastcompdt = compdt lastcomp = comp if not lastcomp: # RFC says nothing about what to do when a given # time is before the first onset date. We'll look for the # first standard component, or the first component, if # none is found. for comp in self._comps: if not comp.isdst: lastcomp = comp break else: lastcomp = comp[0] self._cachedate.insert(0, dt) self._cachecomp.insert(0, lastcomp) if len(self._cachedate) > 10: self._cachedate.pop() self._cachecomp.pop() return lastcomp def utcoffset(self, dt): return self._find_comp(dt).tzoffsetto def dst(self, dt): comp = self._find_comp(dt) if comp.isdst: return comp.tzoffsetdiff else: return ZERO @tzname_in_python2 def tzname(self, dt): return self._find_comp(dt).tzname def __repr__(self): return "<tzicalvtz %s>" % repr(self._tzid) __reduce__ = object.__reduce__
[docs]class tzical(object): def __init__(self, fileobj): global rrule if not rrule: from dateutil import rrule if isinstance(fileobj, string_types): self._s = fileobj # ical should be encoded in UTF-8 with CRLF fileobj = open(fileobj, 'r') elif hasattr(fileobj, "name"): self._s = fileobj.name else: self._s = repr(fileobj) self._vtz = {} self._parse_rfc(fileobj.read())
[docs] def keys(self): return list(self._vtz.keys())
[docs] def get(self, tzid=None): if tzid is None: keys = list(self._vtz.keys()) if len(keys) == 0: raise ValueError("no timezones defined") elif len(keys) > 1: raise ValueError("more than one timezone available") tzid = keys[0] return self._vtz.get(tzid)
def _parse_offset(self, s): s = s.strip() if not s: raise ValueError("empty offset") if s[0] in ('+', '-'): signal = (-1, +1)[s[0] == '+'] s = s[1:] else: signal = +1 if len(s) == 4: return (int(s[:2])*3600+int(s[2:])*60)*signal elif len(s) == 6: return (int(s[:2])*3600+int(s[2:4])*60+int(s[4:]))*signal else: raise ValueError("invalid offset: "+s) def _parse_rfc(self, s): lines = s.splitlines() if not lines: raise ValueError("empty string") # Unfold i = 0 while i < len(lines): line = lines[i].rstrip() if not line: del lines[i] elif i > 0 and line[0] == " ": lines[i-1] += line[1:] del lines[i] else: i += 1 tzid = None comps = [] invtz = False comptype = None for line in lines: if not line: continue name, value = line.split(':', 1) parms = name.split(';') if not parms: raise ValueError("empty property name") name = parms[0].upper() parms = parms[1:] if invtz: if name == "BEGIN": if value in ("STANDARD", "DAYLIGHT"): # Process component pass else: raise ValueError("unknown component: "+value) comptype = value founddtstart = False tzoffsetfrom = None tzoffsetto = None rrulelines = [] tzname = None elif name == "END": if value == "VTIMEZONE": if comptype: raise ValueError("component not closed: "+comptype) if not tzid: raise ValueError("mandatory TZID not found") if not comps: raise ValueError( "at least one component is needed") # Process vtimezone self._vtz[tzid] = _tzicalvtz(tzid, comps) invtz = False elif value == comptype: if not founddtstart: raise ValueError("mandatory DTSTART not found") if tzoffsetfrom is None: raise ValueError( "mandatory TZOFFSETFROM not found") if tzoffsetto is None: raise ValueError( "mandatory TZOFFSETFROM not found") # Process component rr = None if rrulelines: rr = rrule.rrulestr("\n".join(rrulelines), compatible=True, ignoretz=True, cache=True) comp = _tzicalvtzcomp(tzoffsetfrom, tzoffsetto, (comptype == "DAYLIGHT"), tzname, rr) comps.append(comp) comptype = None else: raise ValueError("invalid component end: "+value) elif comptype: if name == "DTSTART": rrulelines.append(line) founddtstart = True elif name in ("RRULE", "RDATE", "EXRULE", "EXDATE"): rrulelines.append(line) elif name == "TZOFFSETFROM": if parms: raise ValueError( "unsupported %s parm: %s " % (name, parms[0])) tzoffsetfrom = self._parse_offset(value) elif name == "TZOFFSETTO": if parms: raise ValueError( "unsupported TZOFFSETTO parm: "+parms[0]) tzoffsetto = self._parse_offset(value) elif name == "TZNAME": if parms: raise ValueError( "unsupported TZNAME parm: "+parms[0]) tzname = value elif name == "COMMENT": pass else: raise ValueError("unsupported property: "+name) else: if name == "TZID": if parms: raise ValueError( "unsupported TZID parm: "+parms[0]) tzid = value elif name in ("TZURL", "LAST-MODIFIED", "COMMENT"): pass else: raise ValueError("unsupported property: "+name) elif name == "BEGIN" and value == "VTIMEZONE": tzid = None comps = [] invtz = True def __repr__(self): return "%s(%s)" % (self.__class__.__name__, repr(self._s))
if sys.platform != "win32": TZFILES = ["/etc/localtime", "localtime"] TZPATHS = ["/usr/share/zoneinfo", "/usr/lib/zoneinfo", "/etc/zoneinfo"] else: TZFILES = [] TZPATHS = []
[docs]def gettz(name=None): tz = None if not name: try: name = os.environ["TZ"] except KeyError: pass if name is None or name == ":": for filepath in TZFILES: if not os.path.isabs(filepath): filename = filepath for path in TZPATHS: filepath = os.path.join(path, filename) if os.path.isfile(filepath): break else: continue if os.path.isfile(filepath): try: tz = tzfile(filepath) break except (IOError, OSError, ValueError): pass else: tz = tzlocal() else: if name.startswith(":"): name = name[:-1] if os.path.isabs(name): if os.path.isfile(name): tz = tzfile(name) else: tz = None else: for path in TZPATHS: filepath = os.path.join(path, name) if not os.path.isfile(filepath): filepath = filepath.replace(' ', '_') if not os.path.isfile(filepath): continue try: tz = tzfile(filepath) break except (IOError, OSError, ValueError): pass else: tz = None if tzwin is not None: try: tz = tzwin(name) except WindowsError: tz = None if not tz: from dateutil.zoneinfo import gettz tz = gettz(name) if not tz: for c in name: # name must have at least one offset to be a tzstr if c in "0123456789": try: tz = tzstr(name) except ValueError: pass break else: if name in ("GMT", "UTC"): tz = tzutc() elif name in time.tzname: tz = tzlocal() return tz # vim:ts=4:sw=4:et