Mercurial > cpython-lru_cache-weakref

annotate Lib/tzparse.py @ 16413:8819867f14ef legacy-trunk

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Patch derived from Trent's 101162: a Python/C API testing framework. STILL NEEDS UNIX BUILD CHANGES.
author Tim Peters <tim.peters@gmail.com>
date Fri, 02 Feb 2001 05:57:15 +0000
parents 3dd217fbdd59
children 6a527be4c4d1
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
11707
6f4146846337 The third and final doc-string sweep by Ka-Ping Yee.
Guido van Rossum <guido@python.org>
parents: 6519
diff changeset
1 """Parse a timezone specification."""
6f4146846337 The third and final doc-string sweep by Ka-Ping Yee.
Guido van Rossum <guido@python.org>
parents: 6519
diff changeset
2
1078
245003c006a6 Misc changes and new modules. whrandom is "objectified". SOCKET.py
Guido van Rossum <guido@python.org>
parents:
diff changeset
3 # XXX Unfinished.
245003c006a6 Misc changes and new modules. whrandom is "objectified". SOCKET.py
Guido van Rossum <guido@python.org>
parents:
diff changeset
4 # XXX Only the typical form "XXXhhYYY;ddd/hh,ddd/hh" is currently supported.
245003c006a6 Misc changes and new modules. whrandom is "objectified". SOCKET.py
Guido van Rossum <guido@python.org>
parents:
diff changeset
5
6519
24da035ceb6e Convert all remaining *simple* cases of regex usage to re usage.
Guido van Rossum <guido@python.org>
parents: 1746
diff changeset
6 tzpat = ('^([A-Z][A-Z][A-Z])([-+]?[0-9]+)([A-Z][A-Z][A-Z]);'
15873
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
7 '([0-9]+)/([0-9]+),([0-9]+)/([0-9]+)$')
1078
245003c006a6 Misc changes and new modules. whrandom is "objectified". SOCKET.py
Guido van Rossum <guido@python.org>
parents:
diff changeset
8
245003c006a6 Misc changes and new modules. whrandom is "objectified". SOCKET.py
Guido van Rossum <guido@python.org>
parents:
diff changeset
9 tzprog = None
245003c006a6 Misc changes and new modules. whrandom is "objectified". SOCKET.py
Guido van Rossum <guido@python.org>
parents:
diff changeset
10
245003c006a6 Misc changes and new modules. whrandom is "objectified". SOCKET.py
Guido van Rossum <guido@python.org>
parents:
diff changeset
11 def tzparse(tzstr):
15873
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
12 """Given a timezone spec, return a tuple of information
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
13 (tzname, delta, dstname, daystart, hourstart, dayend, hourend),
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
14 where 'tzname' is the name of the timezone, 'delta' is the offset
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
15 in hours from GMT, 'dstname' is the name of the daylight-saving
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
16 timezone, and 'daystart'/'hourstart' and 'dayend'/'hourend'
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
17 specify the starting and ending points for daylight saving time."""
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
18 global tzprog
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
19 if tzprog is None:
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
20 import re
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
21 tzprog = re.compile(tzpat)
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
22 match = tzprog.match(tzstr)
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
23 if not match:
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
24 raise ValueError, 'not the TZ syntax I understand'
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
25 subs = []
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
26 for i in range(1, 8):
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
27 subs.append(match.group(i))
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
28 for i in (1, 3, 4, 5, 6):
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
29 subs[i] = eval(subs[i])
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
30 [tzname, delta, dstname, daystart, hourstart, dayend, hourend] = subs
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
31 return (tzname, delta, dstname, daystart, hourstart, dayend, hourend)
1078
245003c006a6 Misc changes and new modules. whrandom is "objectified". SOCKET.py
Guido van Rossum <guido@python.org>
parents:
diff changeset
32
1316
2f3f293ef5f1 * calendar.py: all libC functionality now moved to built-in time module
Guido van Rossum <guido@python.org>
parents: 1315
diff changeset
33 def tzlocaltime(secs, params):
15873
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
34 """Given a Unix time in seconds and a tuple of information about
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
35 a timezone as returned by tzparse(), return the local time in the
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
36 form (year, month, day, hour, min, sec, yday, wday, tzname)."""
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
37 import time
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
38 (tzname, delta, dstname, daystart, hourstart, dayend, hourend) = params
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
39 year, month, days, hours, mins, secs, yday, wday, isdst = \
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
40 time.gmtime(secs - delta*3600)
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
41 if (daystart, hourstart) <= (yday+1, hours) < (dayend, hourend):
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
42 tzname = dstname
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
43 hours = hours + 1
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
44 return year, month, days, hours, mins, secs, yday, wday, tzname
1078
245003c006a6 Misc changes and new modules. whrandom is "objectified". SOCKET.py
Guido van Rossum <guido@python.org>
parents:
diff changeset
45
245003c006a6 Misc changes and new modules. whrandom is "objectified". SOCKET.py
Guido van Rossum <guido@python.org>
parents:
diff changeset
46 def tzset():
15873
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
47 """Determine the current timezone from the "TZ" environment variable."""
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
48 global tzparams, timezone, altzone, daylight, tzname
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
49 import os
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
50 tzstr = os.environ['TZ']
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
51 tzparams = tzparse(tzstr)
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
52 timezone = tzparams[1] * 3600
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
53 altzone = timezone - 3600
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
54 daylight = 1
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
55 tzname = tzparams[0], tzparams[2]
1078
245003c006a6 Misc changes and new modules. whrandom is "objectified". SOCKET.py
Guido van Rossum <guido@python.org>
parents:
diff changeset
56
1316
2f3f293ef5f1 * calendar.py: all libC functionality now moved to built-in time module
Guido van Rossum <guido@python.org>
parents: 1315
diff changeset
57 def isdst(secs):
15873
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
58 """Return true if daylight-saving time is in effect for the given
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
59 Unix time in the current timezone."""
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
60 import time
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
61 (tzname, delta, dstname, daystart, hourstart, dayend, hourend) = \
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
62 tzparams
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
63 year, month, days, hours, mins, secs, yday, wday, isdst = \
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
64 time.gmtime(secs - delta*3600)
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
65 return (daystart, hourstart) <= (yday+1, hours) < (dayend, hourend)
1078
245003c006a6 Misc changes and new modules. whrandom is "objectified". SOCKET.py
Guido van Rossum <guido@python.org>
parents:
diff changeset
66
245003c006a6 Misc changes and new modules. whrandom is "objectified". SOCKET.py
Guido van Rossum <guido@python.org>
parents:
diff changeset
67 tzset()
245003c006a6 Misc changes and new modules. whrandom is "objectified". SOCKET.py
Guido van Rossum <guido@python.org>
parents:
diff changeset
68
1316
2f3f293ef5f1 * calendar.py: all libC functionality now moved to built-in time module
Guido van Rossum <guido@python.org>
parents: 1315
diff changeset
69 def localtime(secs):
15873
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
70 """Get the local time in the current timezone."""
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
71 return tzlocaltime(secs, tzparams)
1078
245003c006a6 Misc changes and new modules. whrandom is "objectified". SOCKET.py
Guido van Rossum <guido@python.org>
parents:
diff changeset
72
245003c006a6 Misc changes and new modules. whrandom is "objectified". SOCKET.py
Guido van Rossum <guido@python.org>
parents:
diff changeset
73 def test():
15873
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
74 from time import asctime, gmtime
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
75 import time, sys
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
76 now = time.time()
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
77 x = localtime(now)
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
78 tm = x[:-1] + (0,)
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
79 print 'now =', now, '=', asctime(tm), x[-1]
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
80 now = now - now % (24*3600)
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
81 if sys.argv[1:]: now = now + eval(sys.argv[1])
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
82 x = gmtime(now)
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
83 tm = x[:-1] + (0,)
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
84 print 'gmtime =', now, '=', asctime(tm), 'yday =', x[-2]
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
85 jan1 = now - x[-2]*24*3600
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
86 x = localtime(jan1)
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
87 tm = x[:-1] + (0,)
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
88 print 'jan1 =', jan1, '=', asctime(tm), x[-1]
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
89 for d in range(85, 95) + range(265, 275):
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
90 t = jan1 + d*24*3600
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
91 x = localtime(t)
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
92 tm = x[:-1] + (0,)
3dd217fbdd59 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 15543
diff changeset
93 print 'd =', d, 't =', t, '=', asctime(tm), x[-1]