How to call a Perl script from Python, piping input to it?

Question

I\'m hacking some support for DomainKeys and DKIM into an open source email marketing program, which uses a python script to send the actual emails via SMTP. I decided to go

Answer 1

"I'm pretty sure I can use something like os.system for this, but piping a variable to the perl script is something that seems to elude me."

Correct. The subprocess module is like os.system, but provides the piping features you're looking for.