Jim Paris
0808ed5bd8
go away if it gets packaged in Debian etc. Add nilmdb.timestamper classes Start test_timestamper (needs work) Number the functions in test_client so they run in the right order to leave the database in a good state. Fix some brokenness with module importing and namespaces git-svn-id: https://bucket.mit.edu/svn/nilm/nilmdb@10643 ddd99763-3ecb-0310-9145-efcb8ce7c51f
231 lines
11 KiB
Python
231 lines
11 KiB
Python
#!/usr/bin/python2.4
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# -*- coding: utf-8 -*-
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#
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# Copyright 2010 Google Inc. All Rights Reserved.
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#
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"""
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Common time zone acronyms/abbreviations for use with the datetime_tz module.
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*WARNING*: There are lots of caveats when using this module which are listed
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below.
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CAVEAT 1: The acronyms/abbreviations are not globally unique, they are not even
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unique within a region. For example, EST can mean any of,
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Eastern Standard Time in Australia (which is 10 hour ahead of UTC)
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Eastern Standard Time in North America (which is 5 hours behind UTC)
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Where there are two abbreviations the more popular one will appear in the all
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dictionary, while the less common one will only appear in that countries region
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dictionary. IE If using all, EST will be mapped to Eastern Standard Time in
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North America.
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CAVEAT 2: Many of the acronyms don't map to a neat Oslon timezones. For example,
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Eastern European Summer Time (EEDT) is used by many different countries in
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Europe *at different times*! If the acronym does not map neatly to one zone it
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is mapped to the Etc/GMT+-XX Oslon zone. This means that any date manipulations
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can end up with idiot things like summer time in the middle of winter.
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CAVEAT 3: The Summer/Standard time difference is really important! For an hour
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each year it is needed to determine which time you are actually talking about.
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2002-10-27 01:20:00 EST != 2002-10-27 01:20:00 EDT
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"""
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import datetime
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import pytz
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import pytz.tzfile
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class tzabbr(datetime.tzinfo):
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"""A timezone abbreviation.
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*WARNING*: This is not a tzinfo implementation! Trying to use this as tzinfo
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object will result in failure. We inherit from datetime.tzinfo so we can get
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through the dateutil checks.
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"""
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pass
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# A "marker" tzinfo object which is used to signify an unknown timezone.
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unknown = datetime.tzinfo(0)
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regions = {'all': {}, 'military': {}}
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# Create a special alias for the all and military regions
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all = regions['all']
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military = regions['military']
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def tzabbr_register(abbr, name, region, zone, dst):
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"""Register a new timezone abbreviation in the global registry.
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If another abbreviation with the same name has already been registered it new
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abbreviation will only be registered in region specific dictionary.
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"""
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newabbr = tzabbr()
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newabbr.abbr = abbr
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newabbr.name = name
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newabbr.region = region
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newabbr.zone = zone
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newabbr.dst = dst
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if abbr not in all:
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all[abbr] = newabbr
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if not region in regions:
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regions[region] = {}
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assert abbr not in regions[region]
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regions[region][abbr] = newabbr
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def tzinfos_create(use_region):
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abbrs = regions[use_region]
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def tzinfos(abbr, offset):
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if abbr:
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if abbr in abbrs:
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result = abbrs[abbr]
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if offset:
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# FIXME: Check the offset matches the abbreviation we just selected.
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pass
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return result
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else:
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raise ValueError, "Unknown timezone found %s" % abbr
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if offset == 0:
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return pytz.utc
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if offset:
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return pytz.FixedOffset(offset/60)
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return unknown
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return tzinfos
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# Create a special alias for the all tzinfos
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tzinfos = tzinfos_create('all')
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# Create the abbreviations.
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# *WARNING*: Order matters!
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tzabbr_register("A", u"Alpha Time Zone", u"Military", "Etc/GMT-1", False)
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tzabbr_register("ACDT", u"Australian Central Daylight Time", u"Australia",
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"Australia/Adelaide", True)
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tzabbr_register("ACST", u"Australian Central Standard Time", u"Australia",
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"Australia/Adelaide", False)
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tzabbr_register("ADT", u"Atlantic Daylight Time", u"North America",
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"America/Halifax", True)
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tzabbr_register("AEDT", u"Australian Eastern Daylight Time", u"Australia",
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"Australia/Sydney", True)
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tzabbr_register("AEST", u"Australian Eastern Standard Time", u"Australia",
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"Australia/Sydney", False)
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tzabbr_register("AKDT", u"Alaska Daylight Time", u"North America",
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"US/Alaska", True)
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tzabbr_register("AKST", u"Alaska Standard Time", u"North America",
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"US/Alaska", False)
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tzabbr_register("AST", u"Atlantic Standard Time", u"North America",
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"America/Halifax", False)
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tzabbr_register("AWDT", u"Australian Western Daylight Time", u"Australia",
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"Australia/West", True)
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tzabbr_register("AWST", u"Australian Western Standard Time", u"Australia",
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"Australia/West", False)
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tzabbr_register("B", u"Bravo Time Zone", u"Military", "Etc/GMT-2", False)
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tzabbr_register("BST", u"British Summer Time", u"Europe", "Europe/London", True)
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tzabbr_register("C", u"Charlie Time Zone", u"Military", "Etc/GMT-2", False)
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tzabbr_register("CDT", u"Central Daylight Time", u"North America",
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"US/Central", True)
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tzabbr_register("CEDT", u"Central European Daylight Time", u"Europe",
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"Etc/GMT+2", True)
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tzabbr_register("CEST", u"Central European Summer Time", u"Europe",
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"Etc/GMT+2", True)
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tzabbr_register("CET", u"Central European Time", u"Europe", "Etc/GMT+1", False)
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tzabbr_register("CST", u"Central Standard Time", u"North America",
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"US/Central", False)
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tzabbr_register("CXT", u"Christmas Island Time", u"Australia",
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"Indian/Christmas", False)
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tzabbr_register("D", u"Delta Time Zone", u"Military", "Etc/GMT-2", False)
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tzabbr_register("E", u"Echo Time Zone", u"Military", "Etc/GMT-2", False)
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tzabbr_register("EDT", u"Eastern Daylight Time", u"North America",
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"US/Eastern", True)
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tzabbr_register("EEDT", u"Eastern European Daylight Time", u"Europe",
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"Etc/GMT+3", True)
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tzabbr_register("EEST", u"Eastern European Summer Time", u"Europe",
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"Etc/GMT+3", True)
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tzabbr_register("EET", u"Eastern European Time", u"Europe", "Etc/GMT+2", False)
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tzabbr_register("EST", u"Eastern Standard Time", u"North America",
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"US/Eastern", False)
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tzabbr_register("F", u"Foxtrot Time Zone", u"Military", "Etc/GMT-6", False)
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tzabbr_register("G", u"Golf Time Zone", u"Military", "Etc/GMT-7", False)
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tzabbr_register("GMT", u"Greenwich Mean Time", u"Europe", pytz.utc, False)
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tzabbr_register("H", u"Hotel Time Zone", u"Military", "Etc/GMT-8", False)
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#tzabbr_register("HAA", u"Heure Avancée de l'Atlantique", u"North America", u"UTC - 3 hours")
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#tzabbr_register("HAC", u"Heure Avancée du Centre", u"North America", u"UTC - 5 hours")
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tzabbr_register("HADT", u"Hawaii-Aleutian Daylight Time", u"North America",
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"Pacific/Honolulu", True)
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#tzabbr_register("HAE", u"Heure Avancée de l'Est", u"North America", u"UTC - 4 hours")
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#tzabbr_register("HAP", u"Heure Avancée du Pacifique", u"North America", u"UTC - 7 hours")
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#tzabbr_register("HAR", u"Heure Avancée des Rocheuses", u"North America", u"UTC - 6 hours")
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tzabbr_register("HAST", u"Hawaii-Aleutian Standard Time", u"North America",
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"Pacific/Honolulu", False)
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#tzabbr_register("HAT", u"Heure Avancée de Terre-Neuve", u"North America", u"UTC - 2:30 hours")
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#tzabbr_register("HAY", u"Heure Avancée du Yukon", u"North America", u"UTC - 8 hours")
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tzabbr_register("HDT", u"Hawaii Daylight Time", u"North America",
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"Pacific/Honolulu", True)
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#tzabbr_register("HNA", u"Heure Normale de l'Atlantique", u"North America", u"UTC - 4 hours")
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#tzabbr_register("HNC", u"Heure Normale du Centre", u"North America", u"UTC - 6 hours")
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#tzabbr_register("HNE", u"Heure Normale de l'Est", u"North America", u"UTC - 5 hours")
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#tzabbr_register("HNP", u"Heure Normale du Pacifique", u"North America", u"UTC - 8 hours")
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#tzabbr_register("HNR", u"Heure Normale des Rocheuses", u"North America", u"UTC - 7 hours")
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#tzabbr_register("HNT", u"Heure Normale de Terre-Neuve", u"North America", u"UTC - 3:30 hours")
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#tzabbr_register("HNY", u"Heure Normale du Yukon", u"North America", u"UTC - 9 hours")
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tzabbr_register("HST", u"Hawaii Standard Time", u"North America",
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"Pacific/Honolulu", False)
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tzabbr_register("I", u"India Time Zone", u"Military", "Etc/GMT-9", False)
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tzabbr_register("IST", u"Irish Summer Time", u"Europe", "Europe/Dublin", True)
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tzabbr_register("K", u"Kilo Time Zone", u"Military", "Etc/GMT-10", False)
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tzabbr_register("L", u"Lima Time Zone", u"Military", "Etc/GMT-11", False)
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tzabbr_register("M", u"Mike Time Zone", u"Military", "Etc/GMT-12", False)
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tzabbr_register("MDT", u"Mountain Daylight Time", u"North America",
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"US/Mountain", True)
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#tzabbr_register("MESZ", u"Mitteleuroäische Sommerzeit", u"Europe", u"UTC + 2 hours")
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#tzabbr_register("MEZ", u"Mitteleuropäische Zeit", u"Europe", u"UTC + 1 hour")
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tzabbr_register("MSD", u"Moscow Daylight Time", u"Europe",
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"Europe/Moscow", True)
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tzabbr_register("MSK", u"Moscow Standard Time", u"Europe",
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"Europe/Moscow", False)
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tzabbr_register("MST", u"Mountain Standard Time", u"North America",
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"US/Mountain", False)
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tzabbr_register("N", u"November Time Zone", u"Military", "Etc/GMT+1", False)
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tzabbr_register("NDT", u"Newfoundland Daylight Time", u"North America",
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"America/St_Johns", True)
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tzabbr_register("NFT", u"Norfolk (Island) Time", u"Australia",
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"Pacific/Norfolk", False)
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tzabbr_register("NST", u"Newfoundland Standard Time", u"North America",
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"America/St_Johns", False)
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tzabbr_register("O", u"Oscar Time Zone", u"Military", "Etc/GMT+2", False)
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tzabbr_register("P", u"Papa Time Zone", u"Military", "Etc/GMT+3", False)
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tzabbr_register("PDT", u"Pacific Daylight Time", u"North America",
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"US/Pacific", True)
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tzabbr_register("PST", u"Pacific Standard Time", u"North America",
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"US/Pacific", False)
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tzabbr_register("Q", u"Quebec Time Zone", u"Military", "Etc/GMT+4", False)
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tzabbr_register("R", u"Romeo Time Zone", u"Military", "Etc/GMT+5", False)
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tzabbr_register("S", u"Sierra Time Zone", u"Military", "Etc/GMT+6", False)
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tzabbr_register("T", u"Tango Time Zone", u"Military", "Etc/GMT+7", False)
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tzabbr_register("U", u"Uniform Time Zone", u"Military", "Etc/GMT+8", False)
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tzabbr_register("UTC", u"Coordinated Universal Time", u"Europe",
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pytz.utc, False)
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tzabbr_register("V", u"Victor Time Zone", u"Military", "Etc/GMT+9", False)
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tzabbr_register("W", u"Whiskey Time Zone", u"Military", "Etc/GMT+10", False)
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tzabbr_register("WDT", u"Western Daylight Time", u"Australia",
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"Australia/West", True)
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tzabbr_register("WEDT", u"Western European Daylight Time", u"Europe",
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"Etc/GMT+1", True)
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tzabbr_register("WEST", u"Western European Summer Time", u"Europe",
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"Etc/GMT+1", True)
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tzabbr_register("WET", u"Western European Time", u"Europe", pytz.utc, False)
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tzabbr_register("WST", u"Western Standard Time", u"Australia",
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"Australia/West", False)
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tzabbr_register("X", u"X-ray Time Zone", u"Military", "Etc/GMT+11", False)
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tzabbr_register("Y", u"Yankee Time Zone", u"Military", "Etc/GMT+12", False)
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tzabbr_register("Z", u"Zulu Time Zone", u"Military", pytz.utc, False)
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