This script makes working with Python files in an external editor a little easier.
Sybren Stüvel writes:
Blender lets you script more or less everything. You can have your code inside Blender (and the .blend file) itself, but I prefer to store it outside the .blend file. This makes it easier to handle changes, and allows you to use any editor you want. The downside is that reloading your code becomes a bit of a hassle. This blog post describes a little snippet I wrote to reload my code in Blender with the click of a button.