[pyOpenSSL] Can someone help me get this openssl command into pyOpenSSL?

[Scott C. <sco...@mi...>]

openssl smime -sign -in $tempfile -signer $MY_CERT -inkey $MY_KEY -outform der 
-nodetach -binary | \
openssl smime -encrypt -des3 -binary -outform pem paypal_public_cert_sandbox.pem

I'm not making progress on the pyOpenSSL module and so I'm trying to use 
subprocess to run this which is not the most elegant way.  Can anyone give me 
the right code in Python to do this?

TIA,
Scott