Python time.timezone() Examples

def local_time(self,ttime,year,month,day):
        match = re.search(r'(.{1,2}):(.{2})(.{2})',ttime)
        if match:
            hour = int(match.group(1))
            minute = int(match.group(2))
            ampm = match.group(3)
            if ampm == "pm":
                if hour < 12:
                    hour = hour + 12
                    hour = hour % 24
            else:
                if hour == 12:
                    hour = 0
            london = timezone('Europe/London')
            dt = datetime.datetime(int(year),int(month),int(day),hour,minute,0)
            utc_dt = london.normalize(london.localize(dt)).astimezone(pytz.utc)
            return utc_dt + datetime.timedelta(seconds=-time.timezone)
        return 

def format_datetime(dt, usegmt=False):
    """Turn a datetime into a date string as specified in RFC 2822.

    If usegmt is True, dt must be an aware datetime with an offset of zero.  In
    this case 'GMT' will be rendered instead of the normal +0000 required by
    RFC2822.  This is to support HTTP headers involving date stamps.
    """
    now = dt.timetuple()
    if usegmt:
        if dt.tzinfo is None or dt.tzinfo != datetime.timezone.utc:
            raise ValueError("usegmt option requires a UTC datetime")
        zone = 'GMT'
    elif dt.tzinfo is None:
        zone = '-0000'
    else:
        zone = dt.strftime("%z")
    return _format_timetuple_and_zone(now, zone) 

def __repr__(self):
        """Convert to formal string, for repr().

        >>> tz = timezone.utc
        >>> repr(tz)
        'datetime.timezone.utc'
        >>> tz = timezone(timedelta(hours=-5), 'EST')
        >>> repr(tz)
        "datetime.timezone(datetime.timedelta(-1, 68400), 'EST')"
        """
        if self is self.utc:
            return 'datetime.timezone.utc'
        if self._name is None:
            return "%s(%r)" % ('datetime.' + self.__class__.__name__,
                               self._offset)
        return "%s(%r, %r)" % ('datetime.' + self.__class__.__name__,
                               self._offset, self._name) 

def __repr__(self):
        """Convert to formal string, for repr().

        >>> dt = datetime(2010, 1, 1)
        >>> repr(dt)
        'datetime.datetime(2010, 1, 1, 0, 0)'

        >>> dt = datetime(2010, 1, 1, tzinfo=timezone.utc)
        >>> repr(dt)
        'datetime.datetime(2010, 1, 1, 0, 0, tzinfo=datetime.timezone.utc)'
        """
        return "%s(%d, %d, %d)" % ('datetime.' + self.__class__.__name__,
                                   self._year,
                                   self._month,
                                   self._day)
    # XXX These shouldn't depend on time.localtime(), because that
    # clips the usable dates to [1970 .. 2038).  At least ctime() is
    # easily done without using strftime() -- that's better too because
    # strftime("%c", ...) is locale specific. 

def morsel_to_cookie(morsel):
    """Convert a Morsel object into a Cookie containing the one k/v pair."""

    expires = None
    if morsel['max-age']:
        expires = time.time() + morsel['max-age']
    elif morsel['expires']:
        time_template = '%a, %d-%b-%Y %H:%M:%S GMT'
        expires = time.mktime(
            time.strptime(morsel['expires'], time_template)) - time.timezone
    return create_cookie(
        comment=morsel['comment'],
        comment_url=bool(morsel['comment']),
        discard=False,
        domain=morsel['domain'],
        expires=expires,
        name=morsel.key,
        path=morsel['path'],
        port=None,
        rest={'HttpOnly': morsel['httponly']},
        rfc2109=False,
        secure=bool(morsel['secure']),
        value=morsel.value,
        version=morsel['version'] or 0,
    ) 

def __repr__(self):
        """Convert to formal string, for repr().

        >>> dt = datetime(2010, 1, 1)
        >>> repr(dt)
        'datetime.datetime(2010, 1, 1, 0, 0)'

        >>> dt = datetime(2010, 1, 1, tzinfo=timezone.utc)
        >>> repr(dt)
        'datetime.datetime(2010, 1, 1, 0, 0, tzinfo=datetime.timezone.utc)'
        """
        return "%s(%d, %d, %d)" % ('datetime.' + self.__class__.__name__,
                                   self._year,
                                   self._month,
                                   self._day)
    # XXX These shouldn't depend on time.localtime(), because that
    # clips the usable dates to [1970 .. 2038).  At least ctime() is
    # easily done without using strftime() -- that's better too because
    # strftime("%c", ...) is locale specific. 

def __sub__(self, other):
        "Subtract two datetimes, or a datetime and a timedelta."
        if not isinstance(other, datetime):
            if isinstance(other, timedelta):
                return self + -other
            return NotImplemented

        days1 = self.toordinal()
        days2 = other.toordinal()
        secs1 = self._second + self._minute * 60 + self._hour * 3600
        secs2 = other._second + other._minute * 60 + other._hour * 3600
        base = timedelta(days1 - days2,
                         secs1 - secs2,
                         self._microsecond - other._microsecond)
        if self._tzinfo is other._tzinfo:
            return base
        myoff = self.utcoffset()
        otoff = other.utcoffset()
        if myoff == otoff:
            return base
        if myoff is None or otoff is None:
            raise TypeError("cannot mix naive and timezone-aware time")
        return base + otoff - myoff 

def __repr__(self):
        """Convert to formal string, for repr().

        >>> tz = timezone.utc
        >>> repr(tz)
        'datetime.timezone.utc'
        >>> tz = timezone(timedelta(hours=-5), 'EST')
        >>> repr(tz)
        "datetime.timezone(datetime.timedelta(-1, 68400), 'EST')"
        """
        if self is self.utc:
            return 'datetime.timezone.utc'
        if self._name is None:
            return "%s(%r)" % ('datetime.' + self.__class__.__name__,
                               self._offset)
        return "%s(%r, %r)" % ('datetime.' + self.__class__.__name__,
                               self._offset, self._name) 

def format_datetime(dt, usegmt=False):
    """Turn a datetime into a date string as specified in RFC 2822.

    If usegmt is True, dt must be an aware datetime with an offset of zero.  In
    this case 'GMT' will be rendered instead of the normal +0000 required by
    RFC2822.  This is to support HTTP headers involving date stamps.
    """
    now = dt.timetuple()
    if usegmt:
        if dt.tzinfo is None or dt.tzinfo != datetime.timezone.utc:
            raise ValueError("usegmt option requires a UTC datetime")
        zone = 'GMT'
    elif dt.tzinfo is None:
        zone = '-0000'
    else:
        zone = dt.strftime("%z")
    return _format_timetuple_and_zone(now, zone) 

def __repr__(self):
        """Convert to formal string, for repr().

        >>> dt = datetime(2010, 1, 1)
        >>> repr(dt)
        'datetime.datetime(2010, 1, 1, 0, 0)'

        >>> dt = datetime(2010, 1, 1, tzinfo=timezone.utc)
        >>> repr(dt)
        'datetime.datetime(2010, 1, 1, 0, 0, tzinfo=datetime.timezone.utc)'
        """
        return "%s(%d, %d, %d)" % ('datetime.' + self.__class__.__name__,
                                   self._year,
                                   self._month,
                                   self._day)
    # XXX These shouldn't depend on time.localtime(), because that
    # clips the usable dates to [1970 .. 2038).  At least ctime() is
    # easily done without using strftime() -- that's better too because
    # strftime("%c", ...) is locale specific. 

def __sub__(self, other):
        "Subtract two datetimes, or a datetime and a timedelta."
        if not isinstance(other, datetime):
            if isinstance(other, timedelta):
                return self + -other
            return NotImplemented

        days1 = self.toordinal()
        days2 = other.toordinal()
        secs1 = self._second + self._minute * 60 + self._hour * 3600
        secs2 = other._second + other._minute * 60 + other._hour * 3600
        base = timedelta(days1 - days2,
                         secs1 - secs2,
                         self._microsecond - other._microsecond)
        if self._tzinfo is other._tzinfo:
            return base
        myoff = self.utcoffset()
        otoff = other.utcoffset()
        if myoff == otoff:
            return base
        if myoff is None or otoff is None:
            raise TypeError("cannot mix naive and timezone-aware time")
        return base + otoff - myoff 

def format_datetime(dt, usegmt=False):
    """Turn a datetime into a date string as specified in RFC 2822.

    If usegmt is True, dt must be an aware datetime with an offset of zero.  In
    this case 'GMT' will be rendered instead of the normal +0000 required by
    RFC2822.  This is to support HTTP headers involving date stamps.
    """
    now = dt.timetuple()
    if usegmt:
        if dt.tzinfo is None or dt.tzinfo != datetime.timezone.utc:
            raise ValueError("usegmt option requires a UTC datetime")
        zone = 'GMT'
    elif dt.tzinfo is None:
        zone = '-0000'
    else:
        zone = dt.strftime("%z")
    return _format_timetuple_and_zone(now, zone) 

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 dst(self, dt):
        if dt is None or dt.tzinfo is None:
            # An exception may be sensible here, in one or both cases.
            # It depends on how you want to treat them.  The default
            # fromutc() implementation (called by the default astimezone()
            # implementation) passes a datetime with dt.tzinfo is self.
            return ZERO
        assert dt.tzinfo is self

        # Find first Sunday in April & the last in October.
        start = first_sunday_on_or_after(DSTSTART.replace(year=dt.year))
        end = first_sunday_on_or_after(DSTEND.replace(year=dt.year))

        # Can't compare naive to aware objects, so strip the timezone from
        # dt first.
        if start <= dt.replace(tzinfo=None) < end:
            return HOUR
        else:
            return ZERO 

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 dst(self, dt):
        if dt is None or dt.tzinfo is None:
            # An exception may be sensible here, in one or both cases.
            # It depends on how you want to treat them.  The default
            # fromutc() implementation (called by the default astimezone()
            # implementation) passes a datetime with dt.tzinfo is self.
            return ZERO
        assert dt.tzinfo is self

        # Find first Sunday in April & the last in October.
        start = first_sunday_on_or_after(DSTSTART.replace(year=dt.year))
        end = first_sunday_on_or_after(DSTEND.replace(year=dt.year))

        # Can't compare naive to aware objects, so strip the timezone from
        # dt first.
        if start <= dt.replace(tzinfo=None) < end:
            return HOUR
        else:
            return ZERO 

def morsel_to_cookie(morsel):
    """Convert a Morsel object into a Cookie containing the one k/v pair."""

    expires = None
    if morsel['max-age']:
        expires = time.time() + morsel['max-age']
    elif morsel['expires']:
        time_template = '%a, %d-%b-%Y %H:%M:%S GMT'
        expires = time.mktime(
            time.strptime(morsel['expires'], time_template)) - time.timezone
    return create_cookie(
        comment=morsel['comment'],
        comment_url=bool(morsel['comment']),
        discard=False,
        domain=morsel['domain'],
        expires=expires,
        name=morsel.key,
        path=morsel['path'],
        port=None,
        rest={'HttpOnly': morsel['httponly']},
        rfc2109=False,
        secure=bool(morsel['secure']),
        value=morsel.value,
        version=morsel['version'] or 0,
    ) 

def _TIMESTAMP_TZ_to_python(self, ctx):
        """Converts TIMESTAMP TZ to datetime.

        The timezone offset is piggybacked.
        """
        scale = ctx['scale']

        def conv0(encoded_value: str) -> datetime:
            value, tz = encoded_value.split()
            tzinfo = _generate_tzinfo_from_tzoffset(int(tz) - 1440)
            return datetime.fromtimestamp(float(value), tz=tzinfo)

        def conv(encoded_value: str) -> datetime:
            value, tz = encoded_value.split()
            microseconds = float(value[0:-scale + 6])
            tzinfo = _generate_tzinfo_from_tzoffset(int(tz) - 1440)
            return datetime.fromtimestamp(microseconds, tz=tzinfo)

        return conv if scale > 6 else conv0 

def __repr__(self):
        """Convert to formal string, for repr().

        >>> tz = timezone.utc
        >>> repr(tz)
        'datetime.timezone.utc'
        >>> tz = timezone(timedelta(hours=-5), 'EST')
        >>> repr(tz)
        "datetime.timezone(datetime.timedelta(-1, 68400), 'EST')"
        """
        if self is self.utc:
            return 'datetime.timezone.utc'
        if self._name is None:
            return "%s(%r)" % ('datetime.' + self.__class__.__name__,
                               self._offset)
        return "%s(%r, %r)" % ('datetime.' + self.__class__.__name__,
                               self._offset, self._name) 

def __sub__(self, other):
        "Subtract two datetimes, or a datetime and a timedelta."
        if not isinstance(other, datetime):
            if isinstance(other, timedelta):
                return self + -other
            return NotImplemented

        days1 = self.toordinal()
        days2 = other.toordinal()
        secs1 = self._second + self._minute * 60 + self._hour * 3600
        secs2 = other._second + other._minute * 60 + other._hour * 3600
        base = timedelta(days1 - days2,
                         secs1 - secs2,
                         self._microsecond - other._microsecond)
        if self._tzinfo is other._tzinfo:
            return base
        myoff = self.utcoffset()
        otoff = other.utcoffset()
        if myoff == otoff:
            return base
        if myoff is None or otoff is None:
            raise TypeError("cannot mix naive and timezone-aware time")
        return base + otoff - myoff 

def __repr__(self):
        """Convert to formal string, for repr().

        >>> dt = datetime(2010, 1, 1)
        >>> repr(dt)
        'datetime.datetime(2010, 1, 1, 0, 0)'

        >>> dt = datetime(2010, 1, 1, tzinfo=timezone.utc)
        >>> repr(dt)
        'datetime.datetime(2010, 1, 1, 0, 0, tzinfo=datetime.timezone.utc)'
        """
        return "%s(%d, %d, %d)" % ('datetime.' + self.__class__.__name__,
                                   self._year,
                                   self._month,
                                   self._day)
    # XXX These shouldn't depend on time.localtime(), because that
    # clips the usable dates to [1970 .. 2038).  At least ctime() is
    # easily done without using strftime() -- that's better too because
    # strftime("%c", ...) is locale specific. 

def __repr__(self):
        """Convert to formal string, for repr().

        >>> tz = timezone.utc
        >>> repr(tz)
        'datetime.timezone.utc'
        >>> tz = timezone(timedelta(hours=-5), 'EST')
        >>> repr(tz)
        "datetime.timezone(datetime.timedelta(-1, 68400), 'EST')"
        """
        if self is self.utc:
            return 'datetime.timezone.utc'
        if self._name is None:
            return "%s(%r)" % ('datetime.' + self.__class__.__name__,
                               self._offset)
        return "%s(%r, %r)" % ('datetime.' + self.__class__.__name__,
                               self._offset, self._name) 

def tzinfo(self):
        """timezone info object"""
        return self._tzinfo 

def _derive_offset_timestamp(self, value, is_utc: bool = False):
        """Derives TZ offset and timestamp from the datetime objects."""
        tzinfo = value.tzinfo
        if tzinfo is None:
            # If no tzinfo is attached, use local timezone.
            tzinfo = self._get_session_tz() if not is_utc else pytz.UTC
            t = pytz.utc.localize(value, is_dst=False).astimezone(tzinfo)
        else:
            # if tzinfo is attached, just covert to epoch time
            # as the server expects it in UTC anyway
            t = value
        offset = tzinfo.utcoffset(
            t.replace(tzinfo=None)).total_seconds() / 60 + 1440
        return offset, t 

def _TIMESTAMP_NTZ_numpy_to_python(self, ctx):
        """TIMESTAMP NTZ to datetime64 with no timezone info is attached."""
        def conv(value: str) -> 'numpy.datetime64':
            nanoseconds = int(decimal.Decimal(value).scaleb(9))
            return numpy.datetime64(nanoseconds, 'ns')

        return conv 

def _TIMESTAMP_NTZ_to_python(self, ctx):
        """TIMESTAMP NTZ to datetime with no timezone info is attached."""
        scale = ctx['scale']

        conv0 = lambda value: datetime.utcfromtimestamp(float(value))

        def conv(value: str) -> datetime:
            microseconds = float(value[0:-scale + 6])
            return datetime.utcfromtimestamp(microseconds)

        return conv if scale > 6 else conv0 

def _get_session_tz(self):
        """Gets the session timezone or use the local computer's timezone."""
        try:
            tz = self.get_parameter('TIMEZONE')
            if not tz:
                tz = 'UTC'
            return pytz.timezone(tz)
        except pytz.exceptions.UnknownTimeZoneError:
            logger.warning('converting to tzinfo failed')
            if tzlocal is not None:
                return tzlocal.get_localzone()
            else:
                return datetime.timezone.utc 

def utcoffset(self):
        """Return the timezone offset in minutes east of UTC (negative west of
        UTC)."""
        if self._tzinfo is None:
            return None
        offset = self._tzinfo.utcoffset(None)
        _check_utc_offset("utcoffset", offset)
        return offset 

def _DATE_numpy_to_python(self, _):
        """Converts DATE to datetime.

        No timezone is attached.
        """
        return lambda x: numpy.datetime64(int(x), 'D') 

def tzinfo(self):
        """timezone info object"""
        return self._tzinfo