mitsuhiko/flask — pull request #341 by joeyespo (2011-10-24 21:58:09+00:00)
Title: In Flask.run, when the host/port argument is None, it will now use its default value.

This change allows you to write the following, while allowing `None` (or missing) configuration values.

app.run(app.config.get('APP_HOST'), app.config.get('APP_PORT'))