Forwarding emails to a Python script with procmail

.procmailrc

:0Wc:
| env python mail_receiver.py

email_receiver.py

import sys
import email

full_msg = sys.stdin.read()
msg = email.message_from_string(full_msg)

to = msg['to']
subject = msg['subject']
body = msg['body']

with open('%s-%s.txt' % (msg['from'], subject), 'w') as f:
    f.write(full_msg)

test_email.txt

From: me@example.com
To: me@example.com (self test)
X-info: I'm just testing

BODY OF MESSAGE SEPARATED BY EMPTY LINE
txt txt txt txt txt txt txt txt txt txt

test_procmail.sh

procmail VERBOSE=on ~/.procmailrc < testemail.txt