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.
Blake Spendlove118 Points
Why doesn't the variable need quotation marks? When I added them, it showed first_name instead of Ada. I'm curious - thanks!
Chris FreemanTreehouse Moderator 67,515 Points
Hey Blake Spendlove, good question!
As the Python interpreter parses the code it, any letters grouped together are assumed to be a reference (aka label, variable name). Python looks up the reference in many namespaces (like dictionaries), starting with the local namespace, then in the namespaces for the enclosing layers (functions, classes, and modules), then finally global and built-in namespaces. If a reference can not be resolved, a NameError is raised.
The exception is when an opening quotation mark is found. Any characters encountered after the quotation mark will be become part of a
str object until the matching closing quotation mark is found.
first_name would be looked up as a variable and
”first_name” would become a 10-character string.
Post back if you need more help. Good luck!!!