FM / pytz

/usr/lib/python2.6/site-packages/pytz

Name	Size	Mode	Actions
zoneinfo/	-	0755	rm
exceptions.py	1333	0644	edit dl rm
exceptions.pyc	2019	0644	edit dl rm
lazy.py	5263	0644	edit dl rm
lazy.pyc	6538	0644	edit dl rm
reference.py	3649	0755	edit dl rm
reference.pyc	4912	0644	edit dl rm
reference.pyo	4868	0644	edit dl rm
tzfile.py	4340	0755	edit dl rm
tzfile.pyc	3277	0644	edit dl rm
tzfile.pyo	3183	0644	edit dl rm
tzinfo.py	18380	0755	edit dl rm
tzinfo.pyc	16646	0644	edit dl rm
tzinfo.pyo	16646	0644	edit dl rm
__init__.py	13144	0755	edit dl rm
__init__.pyc	16276	0644	edit dl rm
__init__.pyo	16276	0644	edit dl rm

Edit: /usr/lib/python2.6/site-packages/pytz/__init__.py (13144B)

'''
datetime.tzinfo timezone definitions generated from the
Olson timezone database:

ftp://elsie.nci.nih.gov/pub/tz*.tar.gz

See the datetime section of the Python Library Reference for information
on how to use these modules.
'''

# The Olson database is updated several times a year.
OLSON_VERSION = '2010h'
VERSION = OLSON_VERSION
# Version format for a patch release - only one so far.
#VERSION = OLSON_VERSION + '.2'
__version__ = OLSON_VERSION

OLSEN_VERSION = OLSON_VERSION # Old releases had this misspelling

__all__ = [
    'timezone', 'utc', 'country_timezones', 'country_names',
    'AmbiguousTimeError', 'InvalidTimeError',
    'NonExistentTimeError', 'UnknownTimeZoneError',
    'all_timezones', 'all_timezones_set',
    'common_timezones', 'common_timezones_set',
    ]

import sys, datetime, os.path, gettext
from UserDict import DictMixin

try:
    from pkg_resources import resource_stream
except ImportError:
    resource_stream = None

from tzinfo import AmbiguousTimeError, InvalidTimeError, NonExistentTimeError
from tzinfo import unpickler
from tzfile import build_tzinfo

# Use 2.3 sets module implementation if set builtin is not available
try:
    set
except NameError:
    from sets import Set as set

_tzinfo_dir = os.getenv("TZDIR") or "/usr/share/zoneinfo"
if _tzinfo_dir.endswith(os.sep):
    _tzinfo_dir = _tzinfo_dir[:-1]

def open_resource(name):
    """Open a resource from the zoneinfo subdir for reading.

"""
    name_parts = name.lstrip('/').split('/')
    for part in name_parts:
        if part == os.path.pardir or os.path.sep in part:
            raise ValueError('Bad path segment: %r' % part)
    filename = os.path.join(_tzinfo_dir, *name_parts)
    return open(filename, 'rb')

def resource_exists(name):
    """Return true if the given resource exists"""
    try:
        open_resource(name)
        return True
    except IOError:
        return False

# Enable this when we get some translations?
# We want an i18n API that is useful to programs using Python's gettext
# module, as well as the Zope3 i18n package. Perhaps we should just provide
# the POT file and translations, and leave it up to callers to make use
# of them.
# 
# t = gettext.translation(
#         'pytz', os.path.join(os.path.dirname(__file__), 'locales'),
#         fallback=True
#         )
# def _(timezone_name):
#     """Translate a timezone name using the current locale, returning Unicode"""
#     return t.ugettext(timezone_name)

class UnknownTimeZoneError(KeyError):
    '''Exception raised when pytz is passed an unknown timezone.

>>> isinstance(UnknownTimeZoneError(), LookupError)
    True

This class is actually a subclass of KeyError to provide backwards
    compatibility with code relying on the undocumented behavior of earlier
    pytz releases.

>>> isinstance(UnknownTimeZoneError(), KeyError)
    True
    '''
    pass

_tzinfo_cache = {}

def timezone(zone):
    r''' Return a datetime.tzinfo implementation for the given timezone

>>> from datetime import datetime, timedelta
    >>> utc = timezone('UTC')
    >>> eastern = timezone('US/Eastern')
    >>> eastern.zone
    'US/Eastern'
    >>> timezone(u'US/Eastern') is eastern
    True
    >>> utc_dt = datetime(2002, 10, 27, 6, 0, 0, tzinfo=utc)
    >>> loc_dt = utc_dt.astimezone(eastern)
    >>> fmt = '%Y-%m-%d %H:%M:%S %Z (%z)'
    >>> loc_dt.strftime(fmt)
    '2002-10-27 01:00:00 EST (-0500)'
    >>> (loc_dt - timedelta(minutes=10)).strftime(fmt)
    '2002-10-27 00:50:00 EST (-0500)'
    >>> eastern.normalize(loc_dt - timedelta(minutes=10)).strftime(fmt)
    '2002-10-27 01:50:00 EDT (-0400)'
    >>> (loc_dt + timedelta(minutes=10)).strftime(fmt)
    '2002-10-27 01:10:00 EST (-0500)'

Raises UnknownTimeZoneError if passed an unknown zone.

>>> timezone('Asia/Shangri-La')
    Traceback (most recent call last):
    ...
    UnknownTimeZoneError: 'Asia/Shangri-La'

>>> timezone(u'\N{TRADE MARK SIGN}')
    Traceback (most recent call last):
    ...
    UnknownTimeZoneError: u'\u2122'
    '''
    if zone.upper() == 'UTC':
        return utc

try:
        zone = zone.encode('US-ASCII')
    except UnicodeEncodeError:
        # All valid timezones are ASCII
        raise UnknownTimeZoneError(zone)

zone = _unmunge_zone(zone)
    if zone not in _tzinfo_cache:
        if zone in all_timezones_set:
            _tzinfo_cache[zone] = build_tzinfo(zone, open_resource(zone))
        else:
            raise UnknownTimeZoneError(zone)

return _tzinfo_cache[zone]

def _unmunge_zone(zone):
    """Undo the time zone name munging done by older versions of pytz."""
    return zone.replace('_plus_', '+').replace('_minus_', '-')

ZERO = datetime.timedelta(0)
HOUR = datetime.timedelta(hours=1)

class UTC(datetime.tzinfo):
    """UTC

Identical to the reference UTC implementation given in Python docs except
    that it unpickles using the single module global instance defined beneath
    this class declaration.

Also contains extra attributes and methods to match other pytz tzinfo
    instances.
    """
    zone = "UTC"

_utcoffset = ZERO
    _dst = ZERO
    _tzname = zone

def utcoffset(self, dt):
        return ZERO

def tzname(self, dt):
        return "UTC"

def dst(self, dt):
        return ZERO

def __reduce__(self):
        return _UTC, ()

def localize(self, dt, is_dst=False):
        '''Convert naive time to local time'''
        if dt.tzinfo is not None:
            raise ValueError, 'Not naive datetime (tzinfo is already set)'
        return dt.replace(tzinfo=self)

def normalize(self, dt, is_dst=False):
        '''Correct the timezone information on the given datetime'''
        if dt.tzinfo is None:
            raise ValueError, 'Naive time - no tzinfo set'
        return dt.replace(tzinfo=self)

def __repr__(self):
        return "<UTC>"

def __str__(self):
        return "UTC"

UTC = utc = UTC() # UTC is a singleton

def _UTC():
    """Factory function for utc unpickling.

Makes sure that unpickling a utc instance always returns the same 
    module global.

These examples belong in the UTC class above, but it is obscured; or in
    the README.txt, but we are not depending on Python 2.4 so integrating
    the README.txt examples with the unit tests is not trivial.

>>> import datetime, pickle
    >>> dt = datetime.datetime(2005, 3, 1, 14, 13, 21, tzinfo=utc)
    >>> naive = dt.replace(tzinfo=None)
    >>> p = pickle.dumps(dt, 1)
    >>> naive_p = pickle.dumps(naive, 1)
    >>> len(p), len(naive_p), len(p) - len(naive_p)
    (60, 43, 17)
    >>> new = pickle.loads(p)
    >>> new == dt
    True
    >>> new is dt
    False
    >>> new.tzinfo is dt.tzinfo
    True
    >>> utc is UTC is timezone('UTC')
    True
    >>> utc is timezone('GMT')
    False
    """
    return utc
_UTC.__safe_for_unpickling__ = True

def _p(*args):
    """Factory function for unpickling pytz tzinfo instances.

Just a wrapper around tzinfo.unpickler to save a few bytes in each pickle
    by shortening the path.
    """
    return unpickler(*args)
_p.__safe_for_unpickling__ = True

class _LazyDict(DictMixin):
    """Dictionary populated on first use."""
    data = None
    def __getitem__(self, key):
        if self.data is None:
            self._fill()
        return self.data[key.upper()]

def keys(self):
        if self.data is None:
            self._fill()
        return self.data.keys()

class _CountryTimezoneDict(_LazyDict):
    """Map ISO 3166 country code to a list of timezone names commonly used
    in that country.

iso3166_code is the two letter code used to identify the country.

>>> country_timezones['ch']
    ['Europe/Zurich']
    >>> country_timezones['CH']
    ['Europe/Zurich']
    >>> country_timezones[u'ch']
    ['Europe/Zurich']
    >>> country_timezones['XXX']
    Traceback (most recent call last):
    ...
    KeyError: 'XXX'

Previously, this information was exposed as a function rather than a
    dictionary. This is still supported::

>>> country_timezones('nz')
    ['Pacific/Auckland', 'Pacific/Chatham']
    """
    def __call__(self, iso3166_code):
        """Backwards compatibility."""
        return self[iso3166_code]

def _fill(self):
        data = {}
        zone_tab = open_resource('zone.tab')
        for line in zone_tab:
            if line.startswith('#'):
                continue
            code, coordinates, zone = line.split(None, 4)[:3]
            if zone not in all_timezones_set:
                continue
            try:
                data[code].append(zone)
            except KeyError:
                data[code] = [zone]
        self.data = data

country_timezones = _CountryTimezoneDict()

class _CountryNameDict(_LazyDict):
    '''Dictionary proving ISO3166 code -> English name.

>>> country_names['au']
    'Australia'
    '''
    def _fill(self):
        data = {}
        zone_tab = open_resource('iso3166.tab')
        for line in zone_tab.readlines():
            if line.startswith('#'):
                continue
            code, name = line.split(None, 1)
            data[code] = name.strip()
        self.data = data

country_names = _CountryNameDict()

# Time-zone info based solely on fixed offsets

class _FixedOffset(datetime.tzinfo):

zone = None # to match the standard pytz API

def __init__(self, minutes):
        if abs(minutes) >= 1440:
            raise ValueError("absolute offset is too large", minutes)
        self._minutes = minutes
        self._offset = datetime.timedelta(minutes=minutes)

def utcoffset(self, dt):
        return self._offset

def __reduce__(self):
        return FixedOffset, (self._minutes, )

def dst(self, dt):
        return None

def tzname(self, dt):
        return None

def __repr__(self):
        return 'pytz.FixedOffset(%d)' % self._minutes

def FixedOffset(offset, _tzinfos = {}):
    """return a fixed-offset timezone based off a number of minutes.

>>> one = FixedOffset(-330)
        >>> one
        pytz.FixedOffset(-330)
        >>> one.utcoffset(datetime.datetime.now())
        datetime.timedelta(-1, 66600)

>>> two = FixedOffset(1380)
        >>> two
        pytz.FixedOffset(1380)
        >>> two.utcoffset(datetime.datetime.now())
        datetime.timedelta(0, 82800)

The datetime.timedelta must be between the range of -1 and 1 day,
    non-inclusive.

>>> FixedOffset(1440)
        Traceback (most recent call last):
        ...
        ValueError: ('absolute offset is too large', 1440)

>>> FixedOffset(-1440)
        Traceback (most recent call last):
        ...
        ValueError: ('absolute offset is too large', -1440)

An offset of 0 is special-cased to return UTC.

>>> FixedOffset(0) is UTC
        True

There should always be only one instance of a FixedOffset per timedelta.
    This should be true for multiple creation calls.

>>> FixedOffset(-330) is one
        True
        >>> FixedOffset(1380) is two
        True

It should also be true for pickling.

>>> import pickle
        >>> pickle.loads(pickle.dumps(one)) is one
        True
        >>> pickle.loads(pickle.dumps(two)) is two
        True
    """
    if offset == 0:
        return UTC

info = _tzinfos.get(offset)
    if info is None:
        # We haven't seen this one before. we need to save it.

# Use setdefault to avoid a race condition and make sure we have
        # only one
        info = _tzinfos.setdefault(offset, _FixedOffset(offset))

return info

FixedOffset.__safe_for_unpickling__ = True

def _test():
    import doctest, os, sys
    sys.path.insert(0, os.pardir)
    import pytz
    return doctest.testmod(pytz)

if __name__ == '__main__':
    _test()

all_timezones = []
for root, dirs, files in os.walk(_tzinfo_dir):
    for exclude in "posix", "right":
        if exclude in dirs:
            del dirs[dirs.index(exclude)]

all_timezones.extend(os.path.join(root, file)[len(_tzinfo_dir)+1:]
                         for file in files
                         if file != "README" and file != "Theory"
                         and "." not in file)
all_timezones.sort()
        
all_timezones_set = set(all_timezones)

common_timezones = [l.split()[2]
                    for l in open(os.path.join(_tzinfo_dir, "zone.tab"))
                    if l != "" and l[0] != "#"]\
  + ['GMT',
     'US/Alaska',
     'US/Arizona',
     'US/Central',
     'US/Eastern',
     'US/Hawaii',
     'US/Mountain',
     'US/Pacific',
     'UTC']
common_timezones.sort()        
common_timezones_set = set(common_timezones)

cmd: