byp4a55 professor6T9

Linux SamCT211 4.4.302+ #86009 SMP Wed Nov 26 18:19:20 CST 2025 x86_64
nginx/1.23.1
192.168.4.211

File Name : reference.py

'''
Reference tzinfo implementations from the Python docs.
Used for testing against as they are only correct for the years
1987 to 2006. Do not use these for real code.
'''

from datetime import tzinfo, timedelta, datetime
from pytz import utc, UTC, HOUR, ZERO

# A class building tzinfo objects for fixed-offset time zones.
# Note that FixedOffset(0, "UTC") is a different way to build a
# UTC tzinfo object.

class FixedOffset(tzinfo):
    """Fixed offset in minutes east from UTC."""

def __init__(self, offset, name):
        self.__offset = timedelta(minutes = offset)
        self.__name = name

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

def tzname(self, dt):
        return self.__name

def dst(self, dt):
        return ZERO

# A class capturing the platform's idea of local time.

import time as _time

STDOFFSET = timedelta(seconds = -_time.timezone)
if _time.daylight:
    DSTOFFSET = timedelta(seconds = -_time.altzone)
else:
    DSTOFFSET = STDOFFSET

DSTDIFF = DSTOFFSET - STDOFFSET

class LocalTimezone(tzinfo):

def utcoffset(self, dt):
        if self._isdst(dt):
            return DSTOFFSET
        else:
            return STDOFFSET

def dst(self, dt):
        if self._isdst(dt):
            return DSTDIFF
        else:
            return ZERO

def tzname(self, dt):
        return _time.tzname[self._isdst(dt)]

def _isdst(self, dt):
        tt = (dt.year, dt.month, dt.day,
              dt.hour, dt.minute, dt.second,
              dt.weekday(), 0, -1)
        stamp = _time.mktime(tt)
        tt = _time.localtime(stamp)
        return tt.tm_isdst > 0

Local = LocalTimezone()

# A complete implementation of current DST rules for major US time zones.

def first_sunday_on_or_after(dt):
    days_to_go = 6 - dt.weekday()
    if days_to_go:
        dt += timedelta(days_to_go)
    return dt

# In the US, DST starts at 2am (standard time) on the first Sunday in April.
DSTSTART = datetime(1, 4, 1, 2)
# and ends at 2am (DST time; 1am standard time) on the last Sunday of Oct.
# which is the first Sunday on or after Oct 25.
DSTEND = datetime(1, 10, 25, 1)

class USTimeZone(tzinfo):

def __init__(self, hours, reprname, stdname, dstname):
        self.stdoffset = timedelta(hours=hours)
        self.reprname = reprname
        self.stdname = stdname
        self.dstname = dstname

def __repr__(self):
        return self.reprname

def tzname(self, dt):
        if self.dst(dt):
            return self.dstname
        else:
            return self.stdname

def utcoffset(self, dt):
        return self.stdoffset + self.dst(dt)

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

Eastern  = USTimeZone(-5, "Eastern",  "EST", "EDT")
Central  = USTimeZone(-6, "Central",  "CST", "CDT")
Mountain = USTimeZone(-7, "Mountain", "MST", "MDT")
Pacific  = USTimeZone(-8, "Pacific",  "PST", "PDT")

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	0/0	0755	2026-03-20 01:04:23
..	dir	-	0/0	0755	2026-03-20 01:04:23
tests	dir	-	0/0	0755	2026-03-20 01:04:23
zoneinfo	dir	-	0/0	0755	2026-03-20 01:04:23
__init__.py	text/x-script.python	33.23 KB	0/0	0644	2026-03-20 01:04:23
exceptions.py	text/x-script.python	1.3 KB	0/0	0644	2026-03-20 01:04:23
lazy.py	text/x-script.python	5.14 KB	0/0	0644	2026-03-20 01:04:23
reference.py	text/x-script.python	3.56 KB	0/0	0644	2026-03-20 01:04:23
tzfile.py	text/x-script.python	4.75 KB	0/0	0644	2026-03-20 01:04:23
tzinfo.py	text/x-script.python	18.91 KB	0/0	0644	2026-03-20 01:04:23

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