Hi Matt. Many thanks. Sorry I had not seen your second post. I'll give this a try and time the completion to compare the differences and post back later today to show os.system, buffered imput and using a file directly for stdout.
Regards, David Matt Nordhoff wrote: > David Pratt wrote: >> Hi David and Matt. I appreciate your help which has got me moving >> forward again so many thanks for your reply. I have been using >> subprocess.Popen a fair bit but this was the first time I had to use >> subprocess to capture large file output. The trouble I was having was >> with the process would just hang. Chunking was the solution. I guess I >> assumed this would be taken care of in the internals. >> >> Overall, I wish subprocess had some better documentation since it is >> definitely not a drop in replacement for os.system. In other >> circumstances I am using subprocess.call() for simple calls which works >> fine. >> >> The speed of this solution is slower than os.system. Would a queue of >> some kind be needed to speed this up? Has anyone implemented something >> like this? Many thanks. >> >> Regards, >> David > > Did you see my second message? That should help performance. If not, I'm > totally out of my depth and have no idea at all. Sorry. > > (How much slower? 10%? 200%?) -- http://mail.python.org/mailman/listinfo/python-list
