Python time.altzone() Examples

def logmsg(request,type,message,args):
    is_dst = time.daylight and time.localtime().tm_isdst > 0
    tz =  - (time.altzone if is_dst else time.timezone) / 36
    if tz>=0:
        tz="+%04d"%tz
    else:
        tz="%05d"%tz
    datestr = '%d/%b/%Y %H:%M:%S'
    user = getattr(logStore,'user','')
    isValid = getattr(logStore,'isValid','')
    code = getattr(logStore,'code','')
    args = getLogDateTime(args)
    log = '%s %s,%s,%s,%s,%s,%s' % (datetime.now().strftime(datestr),tz,request.address_string(),user,isValid,code, message % args)
    with logLock:
        with open(cfg.logpath,'a') as fw:
            fw.write(log+os.linesep)
    return log 

def local_time_to_online(dt=None):
    """
       converts datetime object to a UTC timestamp for AGOL
       Inputs:
          dt - datetime object
       Output:
          Long value
    """
    if dt is None:
        dt = datetime.datetime.now()

    is_dst = time.daylight and time.localtime().tm_isdst > 0
    utc_offset =  (time.altzone if is_dst else time.timezone)

    return (time.mktime(dt.timetuple())  * 1000) + (utc_offset *1000)
#---------------------------------------------------------------------- 

def write_log(self, environ, method, req_uri, start, status, bytes):
        if bytes is None:
            bytes = '-'
        if time.daylight:
                offset = time.altzone / 60 / 60 * -100
        else:
                offset = time.timezone / 60 / 60 * -100
        if offset >= 0:
                offset = "+%0.4d" % (offset)
        elif offset < 0:
                offset = "%0.4d" % (offset)
        d = {
            'REMOTE_ADDR': environ.get('REMOTE_ADDR') or '-',
            'REMOTE_USER': environ.get('REMOTE_USER') or '-',
            'REQUEST_METHOD': method,
            'REQUEST_URI': req_uri,
            'HTTP_VERSION': environ.get('SERVER_PROTOCOL'),
            'time': time.strftime('%d/%b/%Y:%H:%M:%S ', start) + offset,
            'status': status.split(None, 1)[0],
            'bytes': bytes,
            'HTTP_REFERER': environ.get('HTTP_REFERER', '-'),
            'HTTP_USER_AGENT': environ.get('HTTP_USER_AGENT', '-'),
            }
        message = self.format % d
        self.logger.log(self.logging_level, message) 

def Time2Internaldate(date_time):

    """Convert 'date_time' to IMAP4 INTERNALDATE representation.

    Return string in form: '"DD-Mmm-YYYY HH:MM:SS +HHMM"'
    """

    if isinstance(date_time, (int, float)):
        tt = time.localtime(date_time)
    elif isinstance(date_time, (tuple, time.struct_time)):
        tt = date_time
    elif isinstance(date_time, str) and (date_time[0],date_time[-1]) == ('"','"'):
        return date_time        # Assume in correct format
    else:
        raise ValueError("date_time not of a known type")

    dt = time.strftime("%d-%b-%Y %H:%M:%S", tt)
    if dt[0] == '0':
        dt = ' ' + dt[1:]
    if time.daylight and tt[-1]:
        zone = -time.altzone
    else:
        zone = -time.timezone
    return '"' + dt + " %+03d%02d" % divmod(zone//60, 60) + '"' 

def admin():
    version = updater_thread.get_current_version_info()
    if version is False:
        commit = _(u'Unknown')
    else:
        if 'datetime' in version:
            commit = version['datetime']

            tz = timedelta(seconds=time.timezone if (time.localtime().tm_isdst == 0) else time.altzone)
            form_date = datetime.strptime(commit[:19], "%Y-%m-%dT%H:%M:%S")
            if len(commit) > 19:    # check if string has timezone
                if commit[19] == '+':
                    form_date -= timedelta(hours=int(commit[20:22]), minutes=int(commit[23:]))
                elif commit[19] == '-':
                    form_date += timedelta(hours=int(commit[20:22]), minutes=int(commit[23:]))
            commit = format_datetime(form_date - tz, format='short', locale=get_locale())
        else:
            commit = version['version']

    allUser = ub.session.query(ub.User).all()
    email_settings = config.get_mail_settings()
    return render_title_template("admin.html", allUser=allUser, email=email_settings, config=config, commit=commit,
                                 title=_(u"Admin page"), page="admin") 

def Time2Internaldate(date_time):

    """'"DD-Mmm-YYYY HH:MM:SS +HHMM"' = Time2Internaldate(date_time)
    Convert 'date_time' to IMAP4 INTERNALDATE representation."""

    if isinstance(date_time, (int, float)):
        tt = time.localtime(date_time)
    elif isinstance(date_time, (tuple, time.struct_time)):
        tt = date_time
    elif isinstance(date_time, str) and (date_time[0],date_time[-1]) == ('"','"'):
        return date_time        # Assume in correct format
    else:
        raise ValueError("date_time not of a known type")

    if time.daylight and tt[-1]:
        zone = -time.altzone
    else:
        zone = -time.timezone
    return ('"%2d-%s-%04d %02d:%02d:%02d %+03d%02d"' %
            ((tt[2], MonthNames[tt[1]], tt[0]) + tt[3:6] +
             divmod(zone//60, 60))) 

def localtz():
    """:yaql:localtz

    Returns local time zone in timespan object.

    :signature: localtz()
    :returnType: timespan object

    .. code::

        yaql> localtz().hours
        3.0
    """
    if python_time.daylight:
        return TIMESPAN_TYPE(seconds=-python_time.altzone)
    else:
        return TIMESPAN_TYPE(seconds=-python_time.timezone) 

def tz_offset(self):
        if self._tz_offset is not None:
            return self._tz_offset
        elif time.daylight:
            return -time.altzone // 3600
        else:
            return -time.timezone // 3600 

def _convert_time_string_to_utc(time_string):
        datetime_format = '%Y-%m-%d %H:%M'

        the_time = time_string
        if the_time:
            the_time = datetime.datetime.strptime(
                the_time, datetime_format)

            is_dst = time.daylight and time.localtime().tm_isdst > 0
            utc_offset = - (time.altzone if is_dst else time.timezone)

            the_time = (the_time - datetime.timedelta(
                0, utc_offset)).strftime(datetime_format)

        return the_time 

def Time2Internaldate(date_time):

    """Convert date_time to IMAP4 INTERNALDATE representation.

    Return string in form: '"DD-Mmm-YYYY HH:MM:SS +HHMM"'.  The
    date_time argument can be a number (int or float) representing
    seconds since epoch (as returned by time.time()), a 9-tuple
    representing local time, an instance of time.struct_time (as
    returned by time.localtime()), an aware datetime instance or a
    double-quoted string.  In the last case, it is assumed to already
    be in the correct format.
    """
    if isinstance(date_time, (int, float)):
        dt = datetime.fromtimestamp(date_time,
                                    timezone.utc).astimezone()
    elif isinstance(date_time, tuple):
        try:
            gmtoff = date_time.tm_gmtoff
        except AttributeError:
            if time.daylight:
                dst = date_time[8]
                if dst == -1:
                    dst = time.localtime(time.mktime(date_time))[8]
                gmtoff = -(time.timezone, time.altzone)[dst]
            else:
                gmtoff = -time.timezone
        delta = timedelta(seconds=gmtoff)
        dt = datetime(*date_time[:6], tzinfo=timezone(delta))
    elif isinstance(date_time, datetime):
        if date_time.tzinfo is None:
            raise ValueError("date_time must be aware")
        dt = date_time
    elif isinstance(date_time, str) and (date_time[0],date_time[-1]) == ('"','"'):
        return date_time        # Assume in correct format
    else:
        raise ValueError("date_time not of a known type")
    fmt = '"%d-{}-%Y %H:%M:%S %z"'.format(Months[dt.month])
    return dt.strftime(fmt) 

def localtime(dt=None, isdst=-1):
    """Return local time as an aware datetime object.

    If called without arguments, return current time.  Otherwise *dt*
    argument should be a datetime instance, and it is converted to the
    local time zone according to the system time zone database.  If *dt* is
    naive (that is, dt.tzinfo is None), it is assumed to be in local time.
    In this case, a positive or zero value for *isdst* causes localtime to
    presume initially that summer time (for example, Daylight Saving Time)
    is or is not (respectively) in effect for the specified time.  A
    negative value for *isdst* causes the localtime() function to attempt
    to divine whether summer time is in effect for the specified time.

    """
    if dt is None:
        return datetime.datetime.now(datetime.timezone.utc).astimezone()
    if dt.tzinfo is not None:
        return dt.astimezone()
    # We have a naive datetime.  Convert to a (localtime) timetuple and pass to
    # system mktime together with the isdst hint.  System mktime will return
    # seconds since epoch.
    tm = dt.timetuple()[:-1] + (isdst,)
    seconds = time.mktime(tm)
    localtm = time.localtime(seconds)
    try:
        delta = datetime.timedelta(seconds=localtm.tm_gmtoff)
        tz = datetime.timezone(delta, localtm.tm_zone)
    except AttributeError:
        # Compute UTC offset and compare with the value implied by tm_isdst.
        # If the values match, use the zone name implied by tm_isdst.
        delta = dt - datetime.datetime(*time.gmtime(seconds)[:6])
        dst = time.daylight and localtm.tm_isdst > 0
        gmtoff = -(time.altzone if dst else time.timezone)
        if delta == datetime.timedelta(seconds=gmtoff):
            tz = datetime.timezone(delta, time.tzname[dst])
        else:
            tz = datetime.timezone(delta)
    return dt.replace(tzinfo=tz) 

def __init__(self, value=None, pattern=None):
        """
        Constructor.

        value: Date-time value.
        pattern: Date-time pattern that is used when value is a string.
        """
        self.extra = DateTimeExtraInfo.NONE
        self.skip = DateTimeSkips.NONE
        self.status = ClockStatus.OK
        self.timeZone = 0
        self.dayOfWeek = 0
        if isinstance(value, datetime.datetime):
            if value.tzinfo is None:
                self.value = datetime.datetime(value.year, value.month, value.day, value.hour, value.minute, value.second, 0, tzinfo=GXTimeZone(int(-time.altzone / 60)))
            else:
                self.value = value
        elif isinstance(value, str):
            self.value = self.fromString(value, pattern)
        elif isinstance(value, GXDateTime):
            self.value = value.value
            self.skip = value.skip
            self.extra = value.extra
        elif not value:
            self.value = None
        else:
            raise ValueError("Invalid datetime value.") 

def localtime(dt=None, isdst=-1):
    """Return local time as an aware datetime object.

    If called without arguments, return current time.  Otherwise *dt*
    argument should be a datetime instance, and it is converted to the
    local time zone according to the system time zone database.  If *dt* is
    naive (that is, dt.tzinfo is None), it is assumed to be in local time.
    In this case, a positive or zero value for *isdst* causes localtime to
    presume initially that summer time (for example, Daylight Saving Time)
    is or is not (respectively) in effect for the specified time.  A
    negative value for *isdst* causes the localtime() function to attempt
    to divine whether summer time is in effect for the specified time.

    """
    if dt is None:
        return datetime.datetime.now(datetime.timezone.utc).astimezone()
    if dt.tzinfo is not None:
        return dt.astimezone()
    # We have a naive datetime.  Convert to a (localtime) timetuple and pass to
    # system mktime together with the isdst hint.  System mktime will return
    # seconds since epoch.
    tm = dt.timetuple()[:-1] + (isdst,)
    seconds = time.mktime(tm)
    localtm = time.localtime(seconds)
    try:
        delta = datetime.timedelta(seconds=localtm.tm_gmtoff)
        tz = datetime.timezone(delta, localtm.tm_zone)
    except AttributeError:
        # Compute UTC offset and compare with the value implied by tm_isdst.
        # If the values match, use the zone name implied by tm_isdst.
        delta = dt - datetime.datetime(*time.gmtime(seconds)[:6])
        dst = time.daylight and localtm.tm_isdst > 0
        gmtoff = -(time.altzone if dst else time.timezone)
        if delta == datetime.timedelta(seconds=gmtoff):
            tz = datetime.timezone(delta, time.tzname[dst])
        else:
            tz = datetime.timezone(delta)
    return dt.replace(tzinfo=tz) 

def test_localtime(self):
        """ Test the display of local time. """
        import time
        from supvisors.utils import simple_localtime
        time_shift = time.timezone if time.gmtime().tm_isdst else time.altzone
        self.assertEqual('07:07:00', simple_localtime(1476947220.416198 + time_shift)) 

def __init__(self):
        super(tzlocal, self).__init__()

        self._std_offset = datetime.timedelta(seconds=-time.timezone)
        if time.daylight:
            self._dst_offset = datetime.timedelta(seconds=-time.altzone)
        else:
            self._dst_offset = self._std_offset

        self._dst_saved = self._dst_offset - self._std_offset
        self._hasdst = bool(self._dst_saved)
        self._tznames = tuple(time.tzname) 

def utc_offset(): #NOTE: ignore issues like #1647654
    # local time = utc time + utc offset
    if time.daylight and time.localtime().tm_isdst > 0:
        return -time.altzone  # seconds
    return -time.timezone 

def __init__(self):
        super(tzlocal, self).__init__()

        self._std_offset = datetime.timedelta(seconds=-time.timezone)
        if time.daylight:
            self._dst_offset = datetime.timedelta(seconds=-time.altzone)
        else:
            self._dst_offset = self._std_offset

        self._dst_saved = self._dst_offset - self._std_offset
        self._hasdst = bool(self._dst_saved) 

def localtime(dt=None, isdst=-1):
    """Return local time as an aware datetime object.

    If called without arguments, return current time.  Otherwise *dt*
    argument should be a datetime instance, and it is converted to the
    local time zone according to the system time zone database.  If *dt* is
    naive (that is, dt.tzinfo is None), it is assumed to be in local time.
    In this case, a positive or zero value for *isdst* causes localtime to
    presume initially that summer time (for example, Daylight Saving Time)
    is or is not (respectively) in effect for the specified time.  A
    negative value for *isdst* causes the localtime() function to attempt
    to divine whether summer time is in effect for the specified time.

    """
    if dt is None:
        return datetime.datetime.now(datetime.timezone.utc).astimezone()
    if dt.tzinfo is not None:
        return dt.astimezone()
    # We have a naive datetime.  Convert to a (localtime) timetuple and pass to
    # system mktime together with the isdst hint.  System mktime will return
    # seconds since epoch.
    tm = dt.timetuple()[:-1] + (isdst,)
    seconds = time.mktime(tm)
    localtm = time.localtime(seconds)
    try:
        delta = datetime.timedelta(seconds=localtm.tm_gmtoff)
        tz = datetime.timezone(delta, localtm.tm_zone)
    except AttributeError:
        # Compute UTC offset and compare with the value implied by tm_isdst.
        # If the values match, use the zone name implied by tm_isdst.
        delta = dt - datetime.datetime(*time.gmtime(seconds)[:6])
        dst = time.daylight and localtm.tm_isdst > 0
        gmtoff = -(time.altzone if dst else time.timezone)
        if delta == datetime.timedelta(seconds=gmtoff):
            tz = datetime.timezone(delta, time.tzname[dst])
        else:
            tz = datetime.timezone(delta)
    return dt.replace(tzinfo=tz) 

def setUp(self):
        fp = openfile('PyBanner048.gif')
        try:
            data = fp.read()
        finally:
            fp.close()

        container = MIMEBase('multipart', 'mixed', boundary='BOUNDARY')
        image = MIMEImage(data, name='dingusfish.gif')
        image.add_header('content-disposition', 'attachment',
                         filename='dingusfish.gif')
        intro = MIMEText('''\
Hi there,

This is the dingus fish.
''')
        container.attach(intro)
        container.attach(image)
        container['From'] = 'Barry <barry@digicool.com>'
        container['To'] = 'Dingus Lovers <cravindogs@cravindogs.com>'
        container['Subject'] = 'Here is your dingus fish'

        now = 987809702.54848599
        timetuple = time.localtime(now)
        if timetuple[-1] == 0:
            tzsecs = time.timezone
        else:
            tzsecs = time.altzone
        if tzsecs > 0:
            sign = '-'
        else:
            sign = '+'
        tzoffset = ' %s%04d' % (sign, tzsecs // 36)
        container['Date'] = time.strftime(
            '%a, %d %b %Y %H:%M:%S',
            time.localtime(now)) + tzoffset
        self._msg = container
        self._im = image
        self._txt = intro 

def setUp(self):
        fp = openfile('PyBanner048.gif')
        try:
            data = fp.read()
        finally:
            fp.close()

        container = MIMEBase('multipart', 'mixed', boundary='BOUNDARY')
        image = MIMEImage(data, name='dingusfish.gif')
        image.add_header('content-disposition', 'attachment',
                         filename='dingusfish.gif')
        intro = MIMEText('''\
Hi there,

This is the dingus fish.
''')
        container.attach(intro)
        container.attach(image)
        container['From'] = 'Barry <barry@digicool.com>'
        container['To'] = 'Dingus Lovers <cravindogs@cravindogs.com>'
        container['Subject'] = 'Here is your dingus fish'

        now = 987809702.54848599
        timetuple = time.localtime(now)
        if timetuple[-1] == 0:
            tzsecs = time.timezone
        else:
            tzsecs = time.altzone
        if tzsecs > 0:
            sign = '-'
        else:
            sign = '+'
        tzoffset = ' %s%04d' % (sign, tzsecs // 36)
        container['Date'] = time.strftime(
            '%a, %d %b %Y %H:%M:%S',
            time.localtime(now)) + tzoffset
        self._msg = container
        self._im = image
        self._txt = intro 

def Time2Internaldate(date_time):

    """Convert date_time to IMAP4 INTERNALDATE representation.

    Return string in form: '"DD-Mmm-YYYY HH:MM:SS +HHMM"'.  The
    date_time argument can be a number (int or float) representing
    seconds since epoch (as returned by time.time()), a 9-tuple
    representing local time (as returned by time.localtime()), or a
    double-quoted string.  In the last case, it is assumed to already
    be in the correct format.
    """

    if isinstance(date_time, (int, float)):
        tt = time.localtime(date_time)
    elif isinstance(date_time, (tuple, time.struct_time)):
        tt = date_time
    elif isinstance(date_time, str) and (date_time[0],date_time[-1]) == ('"','"'):
        return date_time        # Assume in correct format
    else:
        raise ValueError("date_time not of a known type")

    dt = time.strftime("%d-%b-%Y %H:%M:%S", tt)
    if dt[0] == '0':
        dt = ' ' + dt[1:]
    if time.daylight and tt[-1]:
        zone = -time.altzone
    else:
        zone = -time.timezone
    return '"' + dt + " %+03d%02d" % divmod(zone//60, 60) + '"' 

def Internaldate2tuple(resp):
    """Convert IMAP4 INTERNALDATE to UT.

    Returns Python time module tuple.
    """

    mo = InternalDate.match(resp)
    if not mo:
        return None

    mon = Mon2num[mo.group('mon')]
    zonen = mo.group('zonen')

    day = int(mo.group('day'))
    year = int(mo.group('year'))
    hour = int(mo.group('hour'))
    min = int(mo.group('min'))
    sec = int(mo.group('sec'))
    zoneh = int(mo.group('zoneh'))
    zonem = int(mo.group('zonem'))

    # INTERNALDATE timezone must be subtracted to get UT

    zone = (zoneh*60 + zonem)*60
    if zonen == '-':
        zone = -zone

    tt = (year, mon, day, hour, min, sec, -1, -1, -1)

    utc = time.mktime(tt)

    # Following is necessary because the time module has no 'mkgmtime'.
    # 'mktime' assumes arg in local timezone, so adds timezone/altzone.

    lt = time.localtime(utc)
    if time.daylight and lt[-1]:
        zone = zone + time.altzone
    else:
        zone = zone + time.timezone

    return time.localtime(utc - zone) 

def setUp(self):
        fp = openfile('PyBanner048.gif')
        try:
            data = fp.read()
        finally:
            fp.close()

        container = MIMEBase('multipart', 'mixed', boundary='BOUNDARY')
        image = MIMEImage(data, name='dingusfish.gif')
        image.add_header('content-disposition', 'attachment',
                         filename='dingusfish.gif')
        intro = MIMEText('''\
Hi there,

This is the dingus fish.
''')
        container.attach(intro)
        container.attach(image)
        container['From'] = 'Barry <barry@digicool.com>'
        container['To'] = 'Dingus Lovers <cravindogs@cravindogs.com>'
        container['Subject'] = 'Here is your dingus fish'

        now = 987809702.54848599
        timetuple = time.localtime(now)
        if timetuple[-1] == 0:
            tzsecs = time.timezone
        else:
            tzsecs = time.altzone
        if tzsecs > 0:
            sign = '-'
        else:
            sign = '+'
        tzoffset = ' %s%04d' % (sign, tzsecs // 36)
        container['Date'] = time.strftime(
            '%a, %d %b %Y %H:%M:%S',
            time.localtime(now)) + tzoffset
        self._msg = container
        self._im = image
        self._txt = intro 

def setUp(self):
        fp = openfile('PyBanner048.gif')
        try:
            data = fp.read()
        finally:
            fp.close()

        container = MIMEBase('multipart', 'mixed', boundary='BOUNDARY')
        image = MIMEImage(data, name='dingusfish.gif')
        image.add_header('content-disposition', 'attachment',
                         filename='dingusfish.gif')
        intro = MIMEText('''\
Hi there,

This is the dingus fish.
''')
        container.attach(intro)
        container.attach(image)
        container['From'] = 'Barry <barry@digicool.com>'
        container['To'] = 'Dingus Lovers <cravindogs@cravindogs.com>'
        container['Subject'] = 'Here is your dingus fish'

        now = 987809702.54848599
        timetuple = time.localtime(now)
        if timetuple[-1] == 0:
            tzsecs = time.timezone
        else:
            tzsecs = time.altzone
        if tzsecs > 0:
            sign = '-'
        else:
            sign = '+'
        tzoffset = ' %s%04d' % (sign, tzsecs // 36)
        container['Date'] = time.strftime(
            '%a, %d %b %Y %H:%M:%S',
            time.localtime(now)) + tzoffset
        self._msg = container
        self._im = image
        self._txt = intro 

def Time2Internaldate(date_time):

    """Convert date_time to IMAP4 INTERNALDATE representation.

    Return string in form: '"DD-Mmm-YYYY HH:MM:SS +HHMM"'.  The
    date_time argument can be a number (int or float) representing
    seconds since epoch (as returned by time.time()), a 9-tuple
    representing local time (as returned by time.localtime()), or a
    double-quoted string.  In the last case, it is assumed to already
    be in the correct format.
    """

    if isinstance(date_time, (int, float)):
        tt = time.localtime(date_time)
    elif isinstance(date_time, (tuple, time.struct_time)):
        tt = date_time
    elif isinstance(date_time, str) and (date_time[0],date_time[-1]) == ('"','"'):
        return date_time        # Assume in correct format
    else:
        raise ValueError("date_time not of a known type")

    dt = time.strftime("%d-%b-%Y %H:%M:%S", tt)
    if dt[0] == '0':
        dt = ' ' + dt[1:]
    if time.daylight and tt[-1]:
        zone = -time.altzone
    else:
        zone = -time.timezone
    return '"' + dt + " %+03d%02d" % divmod(zone//60, 60) + '"' 

def Internaldate2Time(resp):

    """time_tuple = Internaldate2Time(resp)
    Convert IMAP4 INTERNALDATE to UT."""

    mo = InternalDate.match(resp)
    if not mo:
        return None

    mon = Mon2num[mo.group('mon')]
    zonen = mo.group('zonen')

    day = int(mo.group('day'))
    year = int(mo.group('year'))
    hour = int(mo.group('hour'))
    min = int(mo.group('min'))
    sec = int(mo.group('sec'))
    zoneh = int(mo.group('zoneh'))
    zonem = int(mo.group('zonem'))

    # INTERNALDATE timezone must be subtracted to get UT

    zone = (zoneh*60 + zonem)*60
    if zonen == '-':
        zone = -zone

    tt = (year, mon, day, hour, min, sec, -1, -1, -1)

    utc = time.mktime(tt)

    # Following is necessary because the time module has no 'mkgmtime'.
    # 'mktime' assumes arg in local timezone, so adds timezone/altzone.

    lt = time.localtime(utc)
    if time.daylight and lt[-1]:
        zone = zone + time.altzone
    else:
        zone = zone + time.timezone

    return time.localtime(utc - zone) 

def for_system(klass):
        """Return a FixedOffset instance for the current working timezone and
        DST conditions.
        """
        if time.localtime().tm_isdst and time.daylight:
            offset = time.altzone
        else:
            offset = time.timezone
        return klass(-offset // 60) 

def __init__(self):
        super(tzlocal, self).__init__()

        self._std_offset = datetime.timedelta(seconds=-time.timezone)
        if time.daylight:
            self._dst_offset = datetime.timedelta(seconds=-time.altzone)
        else:
            self._dst_offset = self._std_offset

        self._dst_saved = self._dst_offset - self._std_offset
        self._hasdst = bool(self._dst_saved)
        self._tznames = tuple(time.tzname) 

def __init__(self):
        super(tzlocal, self).__init__()

        self._std_offset = datetime.timedelta(seconds=-time.timezone)
        if time.daylight:
            self._dst_offset = datetime.timedelta(seconds=-time.altzone)
        else:
            self._dst_offset = self._std_offset

        self._dst_saved = self._dst_offset - self._std_offset
        self._hasdst = bool(self._dst_saved) 

def test_data_attributes(self):
        time.altzone
        time.daylight
        time.timezone
        time.tzname