I would like to suggest to add st_atim, st_mtim and st_ctim attributes in os.stat_result objects returned by os.stat(). These attributes would be 2-tuples containing number of seconds and number of nanoseconds. They would expose relevant functionality from libc's stat() and provide better precision than floating-point-based st_atime, st_mtime and st_ctime attributes.

st_atim, st_mtim and st_ctim attributes would be available only if Python has been built on system with libc supporting st_atim, st_mtim and st_ctim in stat structure.

http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_stat.h.html
http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/time.h.html