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How to use utcoffset method in freezegun

Best Python code snippet using freezegun

tzinfo.py

Source:tzinfo.py

...59    '''60    def fromutc(self, dt):61        '''See datetime.tzinfo.fromutc'''62        return (dt + self._utcoffset).replace(tzinfo=self)63    def utcoffset(self,dt):64        '''See datetime.tzinfo.utcoffset'''65        return self._utcoffset66    def dst(self,dt):67        '''See datetime.tzinfo.dst'''68        return _notime69    def tzname(self,dt):70        '''See datetime.tzinfo.tzname'''71        return self._tzname72    def localize(self, dt, is_dst=False):73        '''Convert naive time to local time'''74        if dt.tzinfo is not None:75            raise ValueError, 'Not naive datetime (tzinfo is already set)'76        return dt.replace(tzinfo=self)77    def normalize(self, dt, is_dst=False):78        '''Correct the timezone information on the given datetime'''79        if dt.tzinfo is None:80            raise ValueError, 'Naive time - no tzinfo set'81        return dt.replace(tzinfo=self)82    def __repr__(self):83        return '<StaticTzInfo %r>' % (self.zone,)84    def __reduce__(self):85        # Special pickle to zone remains a singleton and to cope with86        # database changes.87        return pytz._p, (self.zone,)88class DstTzInfo(BaseTzInfo):89    '''A timezone that has a variable offset from UTC90    The offset might change if daylight savings time comes into effect,91    or at a point in history when the region decides to change their92    timezone definition.93    '''94    # Overridden in subclass95    _utc_transition_times = None # Sorted list of DST transition times in UTC96    _transition_info = None # [(utcoffset, dstoffset, tzname)] corresponding97                            # to _utc_transition_times entries98    zone = None99    # Set in __init__100    _tzinfos = None101    _dst = None # DST offset102    def __init__(self, _inf=None, _tzinfos=None):103        if _inf:104            self._tzinfos = _tzinfos105            self._utcoffset, self._dst, self._tzname = _inf106        else:107            _tzinfos = {}108            self._tzinfos = _tzinfos109            self._utcoffset, self._dst, self._tzname = self._transition_info[0]110            _tzinfos[self._transition_info[0]] = self111            for inf in self._transition_info[1:]:112                if inf not in _tzinfos:113                    _tzinfos[inf] = self.__class__(inf, _tzinfos)114    def fromutc(self, dt):115        '''See datetime.tzinfo.fromutc'''116        dt = dt.replace(tzinfo=None)117        idx = max(0, bisect_right(self._utc_transition_times, dt) - 1)118        inf = self._transition_info[idx]119        return (dt + inf[0]).replace(tzinfo=self._tzinfos[inf])120    def normalize(self, dt):121        '''Correct the timezone information on the given datetime122        If date arithmetic crosses DST boundaries, the tzinfo123        is not magically adjusted. This method normalizes the124        tzinfo to the correct one.125        To test, first we need to do some setup126        >>> from pytz import timezone127        >>> utc = timezone('UTC')128        >>> eastern = timezone('US/Eastern')129        >>> fmt = '%Y-%m-%d %H:%M:%S %Z (%z)'130        We next create a datetime right on an end-of-DST transition point,131        the instant when the wallclocks are wound back one hour.132        >>> utc_dt = datetime(2002, 10, 27, 6, 0, 0, tzinfo=utc)133        >>> loc_dt = utc_dt.astimezone(eastern)134        >>> loc_dt.strftime(fmt)135        '2002-10-27 01:00:00 EST (-0500)'136        Now, if we subtract a few minutes from it, note that the timezone137        information has not changed.138        >>> before = loc_dt - timedelta(minutes=10)139        >>> before.strftime(fmt)140        '2002-10-27 00:50:00 EST (-0500)'141        But we can fix that by calling the normalize method142        >>> before = eastern.normalize(before)143        >>> before.strftime(fmt)144        '2002-10-27 01:50:00 EDT (-0400)'145        '''146        if dt.tzinfo is None:147            raise ValueError, 'Naive time - no tzinfo set'148        # Convert dt in localtime to UTC149        offset = dt.tzinfo._utcoffset150        dt = dt.replace(tzinfo=None)151        dt = dt - offset152        # convert it back, and return it153        return self.fromutc(dt)154    def localize(self, dt, is_dst=False):155        '''Convert naive time to local time.156        This method should be used to construct localtimes, rather157        than passing a tzinfo argument to a datetime constructor.158        is_dst is used to determine the correct timezone in the ambigous159        period at the end of daylight savings time.160        >>> from pytz import timezone161        >>> fmt = '%Y-%m-%d %H:%M:%S %Z (%z)'162        >>> amdam = timezone('Europe/Amsterdam')163        >>> dt  = datetime(2004, 10, 31, 2, 0, 0)164        >>> loc_dt1 = amdam.localize(dt, is_dst=True)165        >>> loc_dt2 = amdam.localize(dt, is_dst=False)166        >>> loc_dt1.strftime(fmt)167        '2004-10-31 02:00:00 CEST (+0200)'168        >>> loc_dt2.strftime(fmt)169        '2004-10-31 02:00:00 CET (+0100)'170        >>> str(loc_dt2 - loc_dt1)171        '1:00:00'172        Use is_dst=None to raise an AmbiguousTimeError for ambiguous173        times at the end of daylight savings174        >>> try:175        ...     loc_dt1 = amdam.localize(dt, is_dst=None)176        ... except AmbiguousTimeError:177        ...     print 'Oops'178        Oops179        >>> loc_dt1 = amdam.localize(dt, is_dst=None)180        Traceback (most recent call last):181            [...]182        AmbiguousTimeError: 2004-10-31 02:00:00183        is_dst defaults to False184        >>> amdam.localize(dt) == amdam.localize(dt, False)185        True186        '''187        if dt.tzinfo is not None:188            raise ValueError, 'Not naive datetime (tzinfo is already set)'189        # Find the possibly correct timezones. We probably just have one,190        # but we might end up with two if we are in the end-of-DST191        # transition period. Or possibly more in some particularly confused192        # location...193        possible_loc_dt = set()194        for tzinfo in self._tzinfos.values():195            loc_dt = tzinfo.normalize(dt.replace(tzinfo=tzinfo))196            if loc_dt.replace(tzinfo=None) == dt:197                possible_loc_dt.add(loc_dt)198        if len(possible_loc_dt) == 1:199            return possible_loc_dt.pop()200        # If told to be strict, raise an exception since we have an201        # ambiguous case202        if is_dst is None:203            raise AmbiguousTimeError(dt)204        # Filter out the possiblilities that don't match the requested205        # is_dst206        filtered_possible_loc_dt = [207            p for p in possible_loc_dt208                if bool(p.tzinfo._dst) == is_dst209            ]210        # Hopefully we only have one possibility left. Return it.211        if len(filtered_possible_loc_dt) == 1:212            return filtered_possible_loc_dt[0]213        if len(filtered_possible_loc_dt) == 0:214            filtered_possible_loc_dt = list(possible_loc_dt)215        # If we get this far, we have in a wierd timezone transition216        # where the clocks have been wound back but is_dst is the same217        # in both (eg. Europe/Warsaw 1915 when they switched to CET).218        # At this point, we just have to guess unless we allow more219        # hints to be passed in (such as the UTC offset or abbreviation),220        # but that is just getting silly.221        #222        # Choose the earliest (by UTC) applicable timezone.223        def mycmp(a,b):224            return cmp(225                    a.replace(tzinfo=None) - a.tzinfo._utcoffset,226                    b.replace(tzinfo=None) - b.tzinfo._utcoffset,227                    )228        filtered_possible_loc_dt.sort(mycmp)229        return filtered_possible_loc_dt[0]230    def utcoffset(self, dt):231        '''See datetime.tzinfo.utcoffset'''232        return self._utcoffset233    def dst(self, dt):234        '''See datetime.tzinfo.dst'''235        return self._dst236    def tzname(self, dt):237        '''See datetime.tzinfo.tzname'''238        return self._tzname239    def __repr__(self):240        if self._dst:241            dst = 'DST'242        else:243            dst = 'STD'244        if self._utcoffset > _notime:...

test_utcoffset.py

Source:test_utcoffset.py

...32        tzinfoobject = UTCOffset(minutes=240)33        # This would raise ISOFormatError or a TypeError if dst info is invalid34        result = datetime.datetime.now(tzinfoobject)35        # Hacky way to make sure the tzinfo is what we'd expect...

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