Python dateutil.tz 模块，gettz() 实例源码

def testTzAll(self):
        from dateutil.tz import tzutc
        from dateutil.tz import tzoffset
        from dateutil.tz import tzlocal
        from dateutil.tz import tzfile
        from dateutil.tz import tzrange
        from dateutil.tz import tzstr
        from dateutil.tz import tzical
        from dateutil.tz import gettz
        from dateutil.tz import tzwin
        from dateutil.tz import tzwinlocal

        tz_all = ["tzutc", "tzoffset", "tzlocal", "tzfile", "tzrange",
                  "tzstr", "tzical", "gettz"]

        tz_all += ["tzwin", "tzwinlocal"] if sys.platform.startswith("win") else []
        lvars = locals()

        for var in tz_all:
            self.assertIsNot(lvars[var], None)

def testFoldPositiveUTCOffset(self):
        # Test that we can resolve ambiguous times
        tzname = self._get_tzname('Australia/Sydney')

        with self._gettz_context(tzname):
            SYD0 = self.gettz(tzname)
            SYD1 = self.gettz(tzname)

            t0_u = datetime(2012, 3, 31, 15, 30, tzinfo=tz.tzutc())  # AEST
            t1_u = datetime(2012, 3, 31, 16, 30, tzinfo=tz.tzutc())  # AEDT

            # Using fresh tzfiles
            t0_syd0 = t0_u.astimezone(SYD0)
            t1_syd1 = t1_u.astimezone(SYD1)

            self.assertEqual(t0_syd0.replace(tzinfo=None),
                             datetime(2012, 4, 1, 2, 30))

            self.assertEqual(t1_syd1.replace(tzinfo=None),
                             datetime(2012, 4, 1, 2, 30))

            self.assertEqual(t0_syd0.utcoffset(), timedelta(hours=11))
            self.assertEqual(t1_syd1.utcoffset(), timedelta(hours=10))

def testGapPositiveUTCOffset(self):
        # Test that we don't have a problem around gaps.
        tzname = self._get_tzname('Australia/Sydney')

        with self._gettz_context(tzname):
            SYD0 = self.gettz(tzname)
            SYD1 = self.gettz(tzname)

            t0_u = datetime(2012, 10, 6, 15, 30, tzinfo=tz.tzutc())  # AEST
            t1_u = datetime(2012, 10, 6, 16, 30, tzinfo=tz.tzutc())  # AEDT

            # Using fresh tzfiles
            t0 = t0_u.astimezone(SYD0)
            t1 = t1_u.astimezone(SYD1)

            self.assertEqual(t0.replace(tzinfo=None),
                             datetime(2012, 10, 7, 1, 30))

            self.assertEqual(t1.replace(tzinfo=None),
                             datetime(2012, 10, 7, 3, 30))

            self.assertEqual(t0.utcoffset(), timedelta(hours=10))
            self.assertEqual(t1.utcoffset(), timedelta(hours=11))

def testGapNegativeUTCOffset(self):
        # Test that we don't have a problem around gaps.
        tzname = self._get_tzname('America/Toronto')

        with self._gettz_context(tzname):
            # Calling fromutc() alters the tzfile object
            TOR0 = self.gettz(tzname)
            TOR1 = self.gettz(tzname)

            t0_u = datetime(2011, 3, 13, 6, 30, tzinfo=tz.tzutc())
            t1_u = datetime(2011, 3, 13, 7, 30, tzinfo=tz.tzutc())

            # Using fresh tzfiles
            t0 = t0_u.astimezone(TOR0)
            t1 = t1_u.astimezone(TOR1)

            self.assertEqual(t0.replace(tzinfo=None),
                             datetime(2011, 3, 13, 1, 30))

            self.assertEqual(t1.replace(tzinfo=None),
                             datetime(2011, 3, 13, 3, 30))

            self.assertNotEqual(t0, t1)
            self.assertEqual(t0.utcoffset(), timedelta(hours=-5.0))
            self.assertEqual(t1.utcoffset(), timedelta(hours=-4.0))

def testEqualAmbiguousComparison(self):
        tzname = self._get_tzname('Australia/Sydney')

        with self._gettz_context(tzname):
            SYD0 = self.gettz(tzname)
            SYD1 = self.gettz(tzname)

            t0_u = datetime(2012, 3, 31, 14, 30, tzinfo=tz.tzutc())  # AEST
            t1_u = datetime(2012, 3, 31, 16, 30, tzinfo=tz.tzutc())  # AEDT

            t0_syd0 = t0_u.astimezone(SYD0)
            t0_syd1 = t0_u.astimezone(SYD1)

            # This is considered an "inter-zone comparison" because it's an
            # ambiguous datetime.
            self.assertEqual(t0_syd0, t0_syd1)

def mk_entry():
    p = argparse.ArgumentParser(description="create a bark entry")
    p.add_argument("name", help="name of bark entry")
    p.add_argument("-a",
                   "--attributes",
                   action='append',
                   type=lambda kv: kv.split("="),
                   dest='keyvalues',
                   help="extra metadata in the form of KEY=VALUE")
    p.add_argument("-t",
                   "--timestamp",
                   help="format: YYYY-MM-DD or YYYY-MM-DD_HH-MM-SS.S")
    p.add_argument("-p",
                   "--parents",
                   help="no error if already exists, new meta-data written",
                   action="store_true")
    p.add_argument('--timezone',
                   help="timezone of timestamp, default: America/Chicago",
                   default='America/Chicago')
    args = p.parse_args()
    timestamp = arrow.get(args.timestamp).replace(
        tzinfo=tz.gettz(args.timezone)).datetime
    attrs = dict(args.keyvalues) if args.keyvalues else {}
    bark.create_entry(args.name, timestamp, args.parents, **attrs)

def convert_timestamp(engine, timestamp):
    """
    Convert timezone from Zulu/UTC to the Engine's timezone
    engine: A Delphix engine session object.
    timestamp: the timstamp in Zulu/UTC to be converted
    """

    default_tz = tz.gettz('UTC')
    engine_tz = time.time.get(engine)

    try:
        convert_tz = tz.gettz(engine_tz.system_time_zone)
        utc = datetime.strptime(timestamp, '%Y-%m-%dT%H:%M:%S')
        utc = utc.replace(tzinfo=default_tz)
        converted_tz = utc.astimezone(convert_tz)
        engine_local_tz = '{} {} {}'.format(str(converted_tz.date()),
                                            str(converted_tz.time()),
                                            str(converted_tz.tzname()))

        return engine_local_tz
    except TypeError:
        return None

def test_fields(self):
        time = datetime.now()
        entry = Entry('title',
                      'username',
                      'password',
                      url='url',
                      notes='notes',
                      tags='tags',
                      expires=True,
                      expiry_time=time,
                      icon=icons.KEY)

        self.assertEqual(entry.title, 'title')
        self.assertEqual(entry.username, 'username')
        self.assertEqual(entry.password, 'password')
        self.assertEqual(entry.url, 'url')
        self.assertEqual(entry.notes, 'notes')
        self.assertEqual(entry.tags, ['tags'])
        self.assertEqual(entry.expires, True)
        self.assertEqual(entry.expiry_time,
                         time.replace(tzinfo=tz.gettz()).astimezone(tz.gettz('UTC')))
        self.assertEqual(entry.icon, icons.KEY)
        self.assertEqual(entry.is_a_history_entry, False)

def my_local_time():
    # METHOD 1: Hardcode zones:
    # from_zone = tz.gettz('UTC')
    # to_zone = tz.gettz('America/New_York')

    # METHOD 2: Auto-detect zones:
    from_zone = tz.tzutc()
    to_zone = tz.tzlocal()

    utc = datetime.utcnow()
    # utc = datetime.strptime('2011-01-21 02:37:21', '%Y-%m-%d %H:%M:%S')

    # Tell the datetime object that it's in UTC time zone since 
    # datetime objects are 'naive' by default
    utc = utc.replace(tzinfo=from_zone)

    # Convert time zone
    return utc.astimezone(to_zone)

def parse_timestamp(timestamp):

    if isinstance(timestamp, text_type):

        # HACK: Assume CET (Europe/Berlin) for human readable timestamp w/o timezone offset
        qualified = any([token in timestamp for token in ['Z', '+', ' CET', ' CEST']])
        if not qualified:
            timestamp += ' CET'

        # Parse datetime string
        # Remark: Maybe use pandas.tseries.tools.parse_time_string?
        # TODO: Cache results of call to gettz to improve performance
        berlin = gettz('Europe/Berlin')
        tzinfos = {'CET': berlin, 'CEST': berlin}
        timestamp = parse(timestamp, tzinfos=tzinfos)

    return timestamp

def timezone(zone):
    """Try to get timezone using pytz or python-dateutil

    :param zone: timezone str
    :return: timezone tzinfo or None
    """
    try:
        import pytz
        return pytz.timezone(zone)
    except ImportError:
        pass
    try:
        from dateutil.tz import gettz
        return gettz(zone)
    except ImportError:
        return None

def timezone(zone):
    """Try to get timezone using pytz or python-dateutil

    :param zone: timezone str
    :return: timezone tzinfo or None
    """
    try:
        import pytz
        return pytz.timezone(zone)
    except ImportError:
        pass
    try:
        from dateutil.tz import gettz
        return gettz(zone)
    except ImportError:
        return None

def dashbaord():
  '''
  date = datetime.now()
  cnn = 'http://rss.cnn.com/rss/cnn_topstories.rss'
  news = feedparser.parse(cnn)
  feed = []
  for item in news.get('items'):
    feed.append({'time':parser.parse(item['published']).astimezone(tz.gettz('America/Los_Angeles')).time().strftime("%I:%M %p"), 'title': item['title'], 'summary': item['summary_detail']['value'].split('<br')[0], 'link':item['links'][0]['href']})

  allViews = getAllDevices()
  allDevices = allViews.get('all_devices')
  weather = allDevices.get('UUID123')
  forecast = weather.get('value').get('forecast')
  forecast = {'value':forecast}
  current=weather.get('value').get('current')
  alerts = weather.get('value').get('alerts')

  for item in forecast.get('value'):
    item['icon'] = WEATHER_MAPPING.get(item.get('icon'))
  current['icon'] = WEATHER_MAPPING.get(current.get('icon'))

  return render_template('dashboard.html', weather=forecast, current=current, alerts=alerts, date=date, feed=feed)
  '''
  return render_template('ui.html')

def customize_parser (self, parser):

        parser.add_argument('--model',
                            # type=get_model,
                            choices=models.known.keys( ))

        parser.add_argument('--timezone',
                            default=gettz( ),
                            type=gettz,
                            help="Timezone to use")
        parser.add_argument('--parser-out',
                            dest="parsed_data",
                            default='-',
                            type=argparse.FileType('w'),
                            help="Put history json in this file")
        return parser

def customize_parser (self, parser):

        parser.add_argument('--model',
                            # type=get_model,
                            choices=models.known.keys( ))

        parser.add_argument('--timezone',
                            default=gettz( ),
                            type=gettz,
                            help="Timezone to use")
        parser.add_argument('--parser-out',
                            dest="parsed_data",
                            default='-',
                            type=argparse.FileType('w'),
                            help="Put history json in this file")
        return parser

def utcToLocal(dt):
        utc = tz.gettz('UTC')
        local = tz.tzlocal()
        dtUtc =  dt.replace(tzinfo=utc)

        return dtUtc.astimezone(local)

def gen_tzinfos():
    for zone in pytz.common_timezones:
        try:
            tzdate = pytz.timezone(zone).localize(dt.utcnow(), is_dst=None)
        except pytz.NonExistentTimeError:
            pass
        else:
            tzinfo = gettz(zone)

            if tzinfo:
                yield tzdate.tzname(), tzinfo

def pretty_print_datetime(dt):
    # Make sure the `dt` is timezone aware before pretty printing.
    if dt.tzinfo is None or dt.tzinfo.utcoffset(dt) is None:
        dt_pretty = dt.replace(tzinfo=tz.gettz('UTC'))
        dt_pretty = dt_pretty.astimezone(tz.tzlocal())
    else:
        dt_pretty = dt.astimezone(tz.tzlocal())

    dt_pretty_friendly = dt_pretty.strftime('%a %d %b, %I:%M%p')
    dt_pretty_humanized = humanize.naturaltime(dt_pretty.replace(tzinfo=None))

    return '%s (%s)' % (dt_pretty_friendly, dt_pretty_humanized,)

def testZoneinfoStar(self):
        from dateutil.zoneinfo import gettz
        from dateutil.zoneinfo import gettz_db_metadata
        from dateutil.zoneinfo import rebuild

        zi_all = (gettz, gettz_db_metadata, rebuild)

        for var in zi_all:
            self.assertIsNot(var, None)

def gettz(self, tzname):
        raise NotImplementedError

def testFoldIndependence(self):
        tzname = self._get_tzname('America/New_York')

        with self._gettz_context(tzname):
            NYC = self.gettz(tzname)
            UTC = tz.tzutc()
            hour = timedelta(hours=1)

            # Firmly 2015-11-01 0:30 EDT-4
            pre_dst = datetime(2015, 11, 1, 0, 30, tzinfo=NYC)

            # Currently, there's no way around the fact that this resolves to an
            # ambiguous date, which defaults to EST. I'm not hard-coding in the
            # answer, though, because the preferred behavior would be that this
            # results in a time on the EDT side.

            # Ambiguous between 2015-11-01 1:30 EDT-4 and 2015-11-01 1:30 EST-5
            in_dst = pre_dst + hour
            in_dst_tzname_0 = in_dst.tzname()     # Stash the tzname - EDT

            # Doing the arithmetic in UTC creates a date that is unambiguously
            # 2015-11-01 1:30 EDT-5
            in_dst_via_utc = (pre_dst.astimezone(UTC) + 2*hour).astimezone(NYC)

            # Make sure the dates are actually ambiguous
            self.assertEqual(in_dst, in_dst_via_utc)

            # Make sure we got the right folding behavior
            self.assertNotEqual(in_dst_via_utc.tzname(), in_dst_tzname_0)

            # Now check to make sure in_dst's tzname hasn't changed
            self.assertEqual(in_dst_tzname_0, in_dst.tzname())

def _test_ambiguous_time(self, dt, tzid, ambiguous):
        # This is a test to check that the individual is_ambiguous values
        # on the _tzinfo subclasses work.
        tzname = self._get_tzname(tzid)

        with self._gettz_context(tzname):
            tzi = self.gettz(tzname)

            self.assertEqual(tz.datetime_ambiguous(dt, tz=tzi), ambiguous)

def _test_imaginary_time(self, dt, tzid, exists):
        tzname = self._get_tzname(tzid)
        with self._gettz_context(tzname):
            tzi = self.gettz(tzname)

            self.assertEqual(tz.datetime_exists(dt, tz=tzi), exists)

def testGettz(self):
        # bug 892569
        str(self.gettz('UTC'))

def testGetTzEquality(self):
        self.assertEqual(self.gettz('UTC'), self.gettz('UTC'))

def testTimeOnlyGettz(self):
        # gettz returns None
        tz_get = self.gettz('Europe/Minsk')
        self.assertIs(dt_time(13, 20, tzinfo=tz_get).utcoffset(), None)

def testTimeOnlyGettzDST(self):
        # gettz returns None
        tz_get = self.gettz('Europe/Minsk')
        self.assertIs(dt_time(13, 20, tzinfo=tz_get).dst(), None)

def testTimeOnlyGettzTzName(self):
        tz_get = self.gettz('Europe/Minsk')
        self.assertIs(dt_time(13, 20, tzinfo=tz_get).tzname(), None)

def testPortugalDST(self):
        # In 1996, Portugal changed from CET to WET
        PORTUGAL = self.gettz('Portugal')

        t_cet = datetime(1996, 3, 31, 1, 59, tzinfo=PORTUGAL)

        self.assertEqual(t_cet.tzname(), 'CET')
        self.assertEqual(t_cet.utcoffset(), timedelta(hours=1))
        self.assertEqual(t_cet.dst(), timedelta(0))

        t_west = datetime(1996, 3, 31, 2, 1, tzinfo=PORTUGAL)

        self.assertEqual(t_west.tzname(), 'WEST')
        self.assertEqual(t_west.utcoffset(), timedelta(hours=1))
        self.assertEqual(t_west.dst(), timedelta(hours=1))

def gettz(self, name):
        zoneinfo_file = zoneinfo.get_zonefile_instance()
        return zoneinfo_file.get(name)

def testZoneInfoFileStart1(self):
        tz = self.gettz("EST5EDT")
        self.assertEqual(datetime(2003, 4, 6, 1, 59, tzinfo=tz).tzname(), "EST",
                         MISSING_TARBALL)
        self.assertEqual(datetime(2003, 4, 6, 2, 00, tzinfo=tz).tzname(), "EDT")

def testZoneInfoFileEnd1(self):
        tzc = self.gettz("EST5EDT")
        self.assertEqual(datetime(2003, 10, 26, 0, 59, tzinfo=tzc).tzname(),
                         "EDT", MISSING_TARBALL)

        end_est = tz.enfold(datetime(2003, 10, 26, 1, 00, tzinfo=tzc), fold=1)
        self.assertEqual(end_est.tzname(), "EST")

def testZoneInfoOffsetSignal(self):
        utc = self.gettz("UTC")
        nyc = self.gettz("America/New_York")
        self.assertNotEqual(utc, None, MISSING_TARBALL)
        self.assertNotEqual(nyc, None)
        t0 = datetime(2007, 11, 4, 0, 30, tzinfo=nyc)
        t1 = t0.astimezone(utc)
        t2 = t1.astimezone(nyc)
        self.assertEqual(t0, t2)
        self.assertEqual(nyc.dst(t0), timedelta(hours=1))

def testZoneInfoDeepCopy(self):
        CHI = self.gettz('America/Chicago')
        CHI_COPY = copy.deepcopy(CHI)

        self.assertIsNot(CHI, CHI_COPY)
        self.assertEqual(CHI, CHI_COPY)

def testZoneInfoDeprecated(self):
        with self.assertWarns(DeprecationWarning):
            tzi = zoneinfo.gettz('US/Eastern')

def gettz(self, tzname):
        tzname_map = {'Australia/Sydney': self.TZ_AEST,
                      'America/Toronto': self.TZ_EST,
                      'America/New_York': self.TZ_EST}

        return tzname_map[tzname]

def testBrokenIsDstHandling(self):
        # tzrange._isdst() was using a date() rather than a datetime().
        # Issue reported by Lennart Regebro.
        dt = datetime(2007, 8, 6, 4, 10, tzinfo=tz.tzutc())
        self.assertEqual(dt.astimezone(tz=tz.gettz("GMT+2")),
                          datetime(2007, 8, 6, 6, 10, tzinfo=tz.tzstr("GMT+2")))

def gettz(self, tzname):
        # Actual time zone changes are handled by the _gettz_context function
        tzname_map = {'Australia/Sydney': self.TZ_AEST,
                      'America/Toronto': self.TZ_EST,
                      'America/New_York': self.TZ_EST}

        return tz.tzstr(tzname_map[tzname])

def testGMTHasNoDaylight(self):
        # tz.tzstr("GMT+2") improperly considered daylight saving time.
        # Issue reported by Lennart Regebro.
        dt = datetime(2007, 8, 6, 4, 10)
        self.assertEqual(tz.gettz("GMT+2").dst(dt), timedelta(0))

def testGMTOffset(self):
        # GMT and UTC offsets have inverted signal when compared to the
        # usual TZ variable handling.
        dt = datetime(2007, 8, 6, 4, 10, tzinfo=tz.tzutc())
        self.assertEqual(dt.astimezone(tz=tz.tzstr("GMT+2")),
                          datetime(2007, 8, 6, 6, 10, tzinfo=tz.tzstr("GMT+2")))
        self.assertEqual(dt.astimezone(tz=tz.gettz("UTC-2")),
                          datetime(2007, 8, 6, 2, 10, tzinfo=tz.tzstr("UTC-2")))

def testPickleTzGettz(self):
        self.assertPicklable(tz.gettz('America/New_York'))

def testSupportAmbiguityFoldNaive(self):
        tzi = tz.gettz('US/Eastern')

        dt = datetime(2011, 11, 6, 1, 30)

        self.assertTrue(tz.datetime_ambiguous(dt, tz=tzi))

def testSupportAmbiguityFoldAware(self):
        tzi = tz.gettz('US/Eastern')

        dt = datetime(2011, 11, 6, 1, 30, tzinfo=tzi)

        self.assertTrue(tz.datetime_ambiguous(dt))

def testSupportAmbiguityUnambiguousNaive(self):
        tzi = tz.gettz('US/Eastern')

        dt = datetime(2011, 11, 6, 4, 30, tzinfo=tzi)

        self.assertFalse(tz.datetime_ambiguous(dt))

def testSpecifiedTzOverridesAttached(self):
        # If a tz is specified, the datetime will be treated as naive.

        # This is not ambiguous in the local zone
        dt = datetime(2011, 11, 6, 1, 30, tzinfo=tz.gettz('Australia/Sydney'))

        self.assertFalse(tz.datetime_ambiguous(dt))

        tzi = tz.gettz('US/Eastern')
        self.assertTrue(tz.datetime_ambiguous(dt, tz=tzi))

def testInGapNaive(self):
        tzi = tz.gettz('Australia/Sydney')

        dt = datetime(2012, 10, 7, 2, 30)

        self.assertFalse(tz.datetime_exists(dt, tz=tzi))

def testInGapAware(self):
        tzi = tz.gettz('Australia/Sydney')

        dt = datetime(2012, 10, 7, 2, 30, tzinfo=tzi)

        self.assertFalse(tz.datetime_exists(dt))

def testExistsNaive(self):
        tzi = tz.gettz('Australia/Sydney')

        dt = datetime(2012, 10, 7, 10, 30)

        self.assertTrue(tz.datetime_exists(dt, tz=tzi))

def testSpecifiedTzOverridesAttached(self):
        EST = tz.gettz('US/Eastern')
        AEST = tz.gettz('Australia/Sydney')

        dt = datetime(2012, 10, 7, 2, 30, tzinfo=EST)  # This time exists

        self.assertFalse(tz.datetime_exists(dt, tz=AEST))

def rhd_filename_to_timestamp(fname, timezone):
    return arrow.get(fname, 'YYMMDD_HHmmss').replace(
        tzinfo=tz.gettz(timezone)).datetime