Case study
To tie together some of the principles presented in this chapter, let's build a mailing list manager. The manager will keep track of e-mail addresses categorized into named groups. When it's time to send a message, we can pick a group and send the message to all e-mail addresses assigned to that group.
Now, before we start working on this project, we ought to have a safe way to test it, without sending e-mails to a bunch of real people. Luckily, Python has our back here; like the test HTTP server, it has a built-in Simple Mail Transfer Protocol (SMTP) server that we can instruct to capture any messages we send without actually sending them. We can run the server with the following command:
python -m smtpd -n -c DebuggingServer localhost:1025 ...Get Python: Master the Art of Design Patterns now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
