Who never received lots of unwanted messages on their e-mail? Certainly, few of us. You probably know it, you should never leave your email address in a web page. To understand why, I propose you to study this small Python script, which will scan the Google search for e-mail addresses. You may be surprised by how much results it will get.
One thing I really love with the Python programming language is its incredible extensibility. Here's a list of 50 awesome modules for Python, covering almost all needs: Databases, GUIs, Images, Sound, OS interaction, Web, and more.