Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Python Python Testing Be Assertive Quantitative Assertions

Posted by sunil shrestha
sunil shrestha
735 Points

I didn't understand self.assertEqual(self.rock, Rock()) .

if ROck() is an instance as said by kenneth sir, how does any instance contain parenthesis .

1 Answer

Steven Parker
Steven Parker
230,688 Points
Steven Parker
Steven Parker
230,688 Points

Putting parentheses after a class name creates a new instance of that class.

The line you show actually causes an error which is discovered later in the video, and then Rock() is replaced with moves.Rock().