Mike Driscoll wrote: > On Jan 22, 3:35 pm, Stef Mientki <[EMAIL PROTECTED]> wrote: > >> Mike Driscoll wrote: >> >>> On Jan 17, 3:56 pm, Stef Mientki <[EMAIL PROTECTED]> wrote: >>> >>>> hello, >>>> >>>> I've a program (not written in Python) that generates a few thousands >>>> bytes per second, >>>> these files are dumped in 2 buffers (files), at in interval time of 50 >>>> msec, >>>> the files can be read by another program, to do further processing. >>>> >>>> A program written in VB or delphi can handle the data in the 2 buffers >>>> perfectly. >>>> Sometimes Python is also able to process the data correctly, >>>> but often it can't :-( >>>> >>>> I keep one of the files open en test the size of the open datafile each >>>> 50 msec. >>>> I have tried >>>> os.stat ( ....) [ ST_SIZE] >>>> os.path.getsize ( ... ) >>>> but they both have the same behaviour, sometimes it works, and the data >>>> is collected each 50 .. 100 msec, >>>> sometimes 1 .. 1.5 seconds is needed to detect a change in filesize. >>>> >>>> I'm using python 2.4 on winXP. >>>> >>>> Is there a solution for this problem ? >>>> >>>> thanks, >>>> Stef Mientki >>>> >>> Tim Golden has a method to watch for changes in a directory on his >>> website: >>> >>> http://tgolden.sc.sabren.com/python/win32_how_do_i/watch_directory_fo... >>> >>> This old post also mentions something similar: >>> >>> http://mail.python.org/pipermail/python-list/2007-October/463065.html >>> >>> And here's a cookbook recipe that claims to do it as well using >>> decorators: >>> >>> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/426620 >>> >>> Hopefully that will get you going. >>> >>> Mike >>> >> thanks Mike, >> sorry for the late reaction. >> I've it working perfect now. >> After all, os.stat works perfectly well, >> the problem was in the program that generated the file with increasing >> size, >> by truncating it after each block write, it apperently garantees that >> the file is flushed to disk and all problems are solved. >> >> cheers, >> Stef Mientki >> > > I almost asked if you were making sure you had flushed the data to the > file...oh well. > Yes, that's a small disadavantage of using a "high-level" language, where there's no flush available, and you assume it'll done automatically ;-)
cheers, Stef -- http://mail.python.org/mailman/listinfo/python-list