that you are mistaken: There is NO difference between the outcome
of os.path.getmtime between Py2.5 and Py2.4. It always did return
UTC, and always will.
In revision 42230, you checked in a change to posixmodule.c with the
following code comment:
/* The CRT of Windows has a number of flaws wrt. its stat()
implementation:
- time stamps are restricted to second resolution
- file modification times suffer from forth-and-back
conversions between
UTC and local time
Therefore, we implement our own stat, based on the Win32 API
directly.
*/
(See
http://svn.python.org/view/python/trunk/Modules/posixmodule.c?rev=42230&view=log
)
Different results are indeed obtained, as others have demonstrated
(other than the irrelevant float/int distinction). The following C
sample program illustrates:
C:\>a d:\temp.txt
Time modified : Thu Feb 08 10:08:44 2007
Time modified : 02/07/2007 22:08:44 UTC
Time modified : 02/08/2007 11:08:44 Local
C:\>c:\python24\python -c "import os;import time;print
time.ctime(os.path.getmtime('temp.txt'))"
Thu Feb 08 10:08:44 2007
C:\>c:\python25\python -c "import os;import time;print
time.ctime(os.path.getmtime('temp.txt'))"
Thu Feb 08 11:08:44 2007
(My local time is UTC-12).
This doesn't happen with every file:
C:\>c:\python24\python -c "import os;import time;print
time.ctime(os.path.getmtime('temp2.txt'))"
Tue May 08 16:59:22 2007
C:\>c:\python25\python -c "import os;import time;print
time.ctime(os.path.getmtime('temp2.txt'))"
Tue May 08 16:59:22 2007
C:\>a d:\temp2.txt
Time modified : Tue May 08 16:59:22 2007
Time modified : 05/08/2007 04:59:22 UTC
Time modified : 05/08/2007 16:59:22 Local
A key fact here, I believe, is that in February (when temp.txt was
last modified), my local time was UTC-11. I expect this is the
suffering that your comment in posixmodule.c refers to (it looks to me
like Python 2.5 is correct).
Cheers,
Tony
---
#include <time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <windows.h>
int main( int argc, char **argv )
{
WIN32_FILE_ATTRIBUTE_DATA lpFileInformation;
SYSTEMTIME stUTC, stLocal;
struct __stat64 buf;
int result;
/* Python 2.4 style */
result = _stat64( argv[1], &buf );
if( result != 0 )
perror( "Problem getting information" );
else
printf( "Time modified : %s", _ctime64( &buf.st_mtime ) );
/* Python 2.5+ */
GetFileAttributesEx(argv[1], GetFileExInfoStandard,
&lpFileInformation);
FileTimeToSystemTime(&lpFileInformation.ftLastWriteTime, &stUTC);
printf("Time modified : %02d/%02d/%d %02d:%02d:%02d UTC\n",
stUTC.wMonth, stUTC.wDay, stUTC.wYear,
stUTC.wHour, stUTC.wMinute, stUTC.wSecond);
SystemTimeToTzSpecificLocalTime(NULL, &stUTC, &stLocal);
printf("Time modified : %02d/%02d/%d %02d:%02d:%02d Local\n",
stLocal.wMonth, stLocal.wDay, stLocal.wYear,
stLocal.wHour, stLocal.wMinute, stLocal.wSecond);
}
