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Date: Mon, 15 May 2006 20:39:26 +0200
From: Christian Franke <Christian DOT Franke AT t-online DOT de>
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To: cygwin AT cygwin DOT com
Subject: Re: Python 2.4.1-1 time.altzone does not include DST offset
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> Python's time.altzone is equal to time.timezone, it should be 
> time.timezone-3600 (for CEST)
>
> $ python -c 'import time; time.tzset(); print time.ctime(), \
>  time.daylight, time.timezone, time.altzone, time.tzname'
> Sun May 14 13:46:55 2006 1 -3600 -3600 ('   ', '   ')

On Cygwin, time.altzone is always set equal to time.timezone.

The attached patch should fix this for most timezones.
The function already uses the same heuristics in the !__CYGWIN__ &&
!HAVE_STRUCT_TM_TM_ZONE case.

Christian


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diff -r -U 6 -p python-2.4.1-1.orig/Modules/timemodule.c python-2.4.1-1/Modules/timemodule.c
--- python-2.4.1-1.orig/Modules/timemodule.c	2004-08-03 19:58:55.001000000 +0200
+++ python-2.4.1-1/Modules/timemodule.c	2006-05-15 16:53:55.171875000 +0200
@@ -697,13 +697,13 @@ void inittimezone(PyObject *m) {
 	}
 #else
 #endif /* HAVE_STRUCT_TM_TM_ZONE */
 #ifdef __CYGWIN__
 	tzset();
 	PyModule_AddIntConstant(m, "timezone", _timezone);
-	PyModule_AddIntConstant(m, "altzone", _timezone);
+	PyModule_AddIntConstant(m, "altzone", _timezone-3600);
 	PyModule_AddIntConstant(m, "daylight", _daylight);
 	PyModule_AddObject(m, "tzname",
 			   Py_BuildValue("(zz)", _tzname[0], _tzname[1]));
 #endif /* __CYGWIN__ */
 #endif /* !HAVE_TZNAME || __GLIBC__ || __CYGWIN__*/
 }


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