mirror of
https://github.com/python/cpython.git
synced 2024-12-01 11:15:56 +01:00
e7b146fb3b
The attached patches update the standard library so that all modules have docstrings beginning with one-line summaries. A new docstring was added to formatter. The docstring for os.py was updated to mention nt, os2, ce in addition to posix, dos, mac.
94 lines
3.0 KiB
Python
94 lines
3.0 KiB
Python
"""Parse a timezone specification."""
|
|
|
|
# XXX Unfinished.
|
|
# XXX Only the typical form "XXXhhYYY;ddd/hh,ddd/hh" is currently supported.
|
|
|
|
tzpat = ('^([A-Z][A-Z][A-Z])([-+]?[0-9]+)([A-Z][A-Z][A-Z]);'
|
|
'([0-9]+)/([0-9]+),([0-9]+)/([0-9]+)$')
|
|
|
|
tzprog = None
|
|
|
|
def tzparse(tzstr):
|
|
"""Given a timezone spec, return a tuple of information
|
|
(tzname, delta, dstname, daystart, hourstart, dayend, hourend),
|
|
where 'tzname' is the name of the timezone, 'delta' is the offset
|
|
in hours from GMT, 'dstname' is the name of the daylight-saving
|
|
timezone, and 'daystart'/'hourstart' and 'dayend'/'hourend'
|
|
specify the starting and ending points for daylight saving time."""
|
|
global tzprog
|
|
if tzprog == None:
|
|
import re
|
|
tzprog = re.compile(tzpat)
|
|
match = tzprog.match(tzstr)
|
|
if not match:
|
|
raise ValueError, 'not the TZ syntax I understand'
|
|
subs = []
|
|
for i in range(1, 8):
|
|
subs.append(match.group(i))
|
|
for i in (1, 3, 4, 5, 6):
|
|
subs[i] = eval(subs[i])
|
|
[tzname, delta, dstname, daystart, hourstart, dayend, hourend] = subs
|
|
return (tzname, delta, dstname, daystart, hourstart, dayend, hourend)
|
|
|
|
def tzlocaltime(secs, params):
|
|
"""Given a Unix time in seconds and a tuple of information about
|
|
a timezone as returned by tzparse(), return the local time in the
|
|
form (year, month, day, hour, min, sec, yday, wday, tzname)."""
|
|
import time
|
|
(tzname, delta, dstname, daystart, hourstart, dayend, hourend) = params
|
|
year, month, days, hours, mins, secs, yday, wday, isdst = \
|
|
time.gmtime(secs - delta*3600)
|
|
if (daystart, hourstart) <= (yday+1, hours) < (dayend, hourend):
|
|
tzname = dstname
|
|
hours = hours + 1
|
|
return year, month, days, hours, mins, secs, yday, wday, tzname
|
|
|
|
def tzset():
|
|
"""Determine the current timezone from the "TZ" environment variable."""
|
|
global tzparams, timezone, altzone, daylight, tzname
|
|
import os
|
|
tzstr = os.environ['TZ']
|
|
tzparams = tzparse(tzstr)
|
|
timezone = tzparams[1] * 3600
|
|
altzone = timezone - 3600
|
|
daylight = 1
|
|
tzname = tzparams[0], tzparams[2]
|
|
|
|
def isdst(secs):
|
|
"""Return true if daylight-saving time is in effect for the given
|
|
Unix time in the current timezone."""
|
|
import time
|
|
(tzname, delta, dstname, daystart, hourstart, dayend, hourend) = \
|
|
tzparams
|
|
year, month, days, hours, mins, secs, yday, wday, isdst = \
|
|
time.gmtime(secs - delta*3600)
|
|
return (daystart, hourstart) <= (yday+1, hours) < (dayend, hourend)
|
|
|
|
tzset()
|
|
|
|
def localtime(secs):
|
|
"""Get the local time in the current timezone."""
|
|
return tzlocaltime(secs, tzparams)
|
|
|
|
def test():
|
|
from time import asctime, gmtime
|
|
import time, sys
|
|
now = time.time()
|
|
x = localtime(now)
|
|
tm = x[:-1] + (0,)
|
|
print 'now =', now, '=', asctime(tm), x[-1]
|
|
now = now - now % (24*3600)
|
|
if sys.argv[1:]: now = now + eval(sys.argv[1])
|
|
x = gmtime(now)
|
|
tm = x[:-1] + (0,)
|
|
print 'gmtime =', now, '=', asctime(tm), 'yday =', x[-2]
|
|
jan1 = now - x[-2]*24*3600
|
|
x = localtime(jan1)
|
|
tm = x[:-1] + (0,)
|
|
print 'jan1 =', jan1, '=', asctime(tm), x[-1]
|
|
for d in range(85, 95) + range(265, 275):
|
|
t = jan1 + d*24*3600
|
|
x = localtime(t)
|
|
tm = x[:-1] + (0,)
|
|
print 'd =', d, 't =', t, '=', asctime(tm), x[-1]
|