I had to produce a (text) list of all the mail I had received, in my gmail, from two addresses. Here's how I did it. Adjust it to your taste.

listgmail.py

#!/usr/bin/env python
import imaplib
from email.parser import HeaderParser

mail = imaplib.IMAP4_SSL('imap.gmail.com')
mail.login('yourmail@gmail.com', 'yourpassword')
mail.select("[Gmail]/All Mail")

# Execute an IMAP search query
status, data =  mail.search(None, '(OR (FROM "example1@gmail.com") (FROM "example2@gmail.com"))')

parser = HeaderParser()

for msg in data[0].split():
    header = mail.fetch(msg, '(BODY[HEADER])')[1][0][1]
    d = parser.parsestr(header)
    print("{:<8} {}".format("Date:", d["Date"]))
    print("{:<8} {}".format("Subject:", d["Subject"]))
    print("{:<8} {}".format("From:", d["From"]))
    print("{:<8} {}\n".format("To:", d["To"]))