Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

Python Build a Social Network with Flask Takin' Names Flask-WTF Forms

I don't quite understand the ASCII thing

Hi,

Can somebody explain to me how that works, how do you know which symbols to use? I think Kenneth just supposed everyone knew this and he doesn't elaborate much on that...

Thanks!

1 Answer

Steven Parker
Steven Parker
217,571 Points

The reference to "ASCII" just means that he's using ordinary characters instead of fancy (unicode) characters. The regex character class shown covers upper case letters (A-Z), lower case letters (a-z), numbers (0-9) and the underscore (_).