En Wed, 05 Aug 2009 09:50:04 -0300, kpal <kpalamartch...@gmail.com> escribió:
The standard datetime has 1 microsecond granularity.
Note that this is the finest granularity a datetime object can store, NOT the precision of datetime.now() by example.
My application needs finer time resolution, preferably float seconds.
"float seconds" doesn't mean much. time.time returns float seconds, but its precision is around 15ms on Windows.
Is there an alternative to the out-of-the-box datetime? Timezone support is not essential.
On Windows, use time.clock(), which internally uses QueryPerformanceCounter. The resolution depends on your hardware, but it's typically better than 1 microsecond. If you want to know the actual value: py> from ctypes import * py> kernel32=windll.kernel32 py> QueryPerformanceCounter=kernel32.QueryPerformanceCounter py> QueryPerformanceFrequency=kernel32.QueryPerformanceFrequency py> plonglong = POINTER(c_longlong) py> QueryPerformanceFrequency.argtypes = [plonglong] py> freq = c_longlong() py> QueryPerformanceFrequency(byref(freq)) 1 py> freq c_longlong(3579545L) That is, on my system the resolution is 1/3579545s, or better than 300ns -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
