I'd like to use the subprocess module to create a pipeline with a fork. For example, what if I wanted a "cat" process to send a file to both an "md5sum" process and a "gzip" process. In bash, I'd do something like this:
> cat source_file | tee >(md5sum > source_file.md5sum) | gzip -c > > source_file.gz What is the best way to "tee" a Python file object so that I can send it to two different subprocess.Popen instances? I tried creating a Tee class with read and write methods that send duplicate data to a number of file objects, but the Popen class won't accept my class as an argument to the stdin parameter. subprocess.Popen seems to require _real_ file objects with file descriptors, etc., not just any class with a read() and write() method. Suggestions anyone? Thanks for your help. --Ethan -- http://mail.python.org/mailman/listinfo/python-list