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a7fba2ee1b
As Brazil does not have Daylight Saving Time anymore as decided by it's government, pytz needed to be updated to have the new data about the country timezones. And as some in pytz calls in bazarr used tzlocal functions, that one needed also to be updated. Works fine now, tested on Brazil - Timezone America/Sao_Paulo This commit fixes #641
140 lines
3.7 KiB
Python
140 lines
3.7 KiB
Python
'''
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Reference tzinfo implementations from the Python docs.
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Used for testing against as they are only correct for the years
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1987 to 2006. Do not use these for real code.
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'''
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from datetime import tzinfo, timedelta, datetime
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from pytz import HOUR, ZERO, UTC
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__all__ = [
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'FixedOffset',
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'LocalTimezone',
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'USTimeZone',
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'Eastern',
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'Central',
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'Mountain',
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'Pacific',
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'UTC'
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]
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# A class building tzinfo objects for fixed-offset time zones.
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# Note that FixedOffset(0, "UTC") is a different way to build a
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# UTC tzinfo object.
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class FixedOffset(tzinfo):
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"""Fixed offset in minutes east from UTC."""
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def __init__(self, offset, name):
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self.__offset = timedelta(minutes=offset)
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self.__name = name
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def utcoffset(self, dt):
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return self.__offset
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def tzname(self, dt):
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return self.__name
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def dst(self, dt):
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return ZERO
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import time as _time
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STDOFFSET = timedelta(seconds=-_time.timezone)
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if _time.daylight:
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DSTOFFSET = timedelta(seconds=-_time.altzone)
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else:
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DSTOFFSET = STDOFFSET
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DSTDIFF = DSTOFFSET - STDOFFSET
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# A class capturing the platform's idea of local time.
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class LocalTimezone(tzinfo):
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def utcoffset(self, dt):
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if self._isdst(dt):
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return DSTOFFSET
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else:
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return STDOFFSET
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def dst(self, dt):
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if self._isdst(dt):
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return DSTDIFF
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else:
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return ZERO
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def tzname(self, dt):
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return _time.tzname[self._isdst(dt)]
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def _isdst(self, dt):
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tt = (dt.year, dt.month, dt.day,
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dt.hour, dt.minute, dt.second,
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dt.weekday(), 0, -1)
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stamp = _time.mktime(tt)
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tt = _time.localtime(stamp)
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return tt.tm_isdst > 0
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Local = LocalTimezone()
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def first_sunday_on_or_after(dt):
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days_to_go = 6 - dt.weekday()
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if days_to_go:
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dt += timedelta(days_to_go)
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return dt
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# In the US, DST starts at 2am (standard time) on the first Sunday in April.
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DSTSTART = datetime(1, 4, 1, 2)
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# and ends at 2am (DST time; 1am standard time) on the last Sunday of Oct.
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# which is the first Sunday on or after Oct 25.
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DSTEND = datetime(1, 10, 25, 1)
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# A complete implementation of current DST rules for major US time zones.
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class USTimeZone(tzinfo):
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def __init__(self, hours, reprname, stdname, dstname):
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self.stdoffset = timedelta(hours=hours)
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self.reprname = reprname
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self.stdname = stdname
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self.dstname = dstname
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def __repr__(self):
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return self.reprname
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def tzname(self, dt):
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if self.dst(dt):
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return self.dstname
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else:
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return self.stdname
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def utcoffset(self, dt):
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return self.stdoffset + self.dst(dt)
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def dst(self, dt):
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if dt is None or dt.tzinfo is None:
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# An exception may be sensible here, in one or both cases.
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# It depends on how you want to treat them. The default
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# fromutc() implementation (called by the default astimezone()
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# implementation) passes a datetime with dt.tzinfo is self.
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return ZERO
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assert dt.tzinfo is self
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# Find first Sunday in April & the last in October.
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start = first_sunday_on_or_after(DSTSTART.replace(year=dt.year))
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end = first_sunday_on_or_after(DSTEND.replace(year=dt.year))
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# Can't compare naive to aware objects, so strip the timezone from
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# dt first.
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if start <= dt.replace(tzinfo=None) < end:
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return HOUR
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else:
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return ZERO
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Eastern = USTimeZone(-5, "Eastern", "EST", "EDT")
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Central = USTimeZone(-6, "Central", "CST", "CDT")
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Mountain = USTimeZone(-7, "Mountain", "MST", "MDT")
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Pacific = USTimeZone(-8, "Pacific", "PST", "PDT")
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