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 Collections (Retired) Dictionaries Teacher Stats

Challenge says fail but when I run it locally it's correct!!!

I submitted the solution to this challenge but it says that my function returns "('Jason Seifer', 7)" ... which I agree is incorrect.

However, when I run my procedure in my local environment my function returns "('Jason Seifer', 3)" ... which is the correct solution.

So why is the Treehouse system failing an apparently correct solution?

Thanks Michael

# The dictionary will be something like:
# {'Jason Seifer': ['Ruby Foundations', 'Ruby on Rails Forms', 'Technology Foundations'],
#  'Kenneth Love': ['Python Basics', 'Python Collections']}
# Often, it's a good idea to hold onto a max_count variable.
# Update it when you find a teacher with more classes than
# the current count. Better hold onto the teacher name somewhere
# too!
# Your code goes below here.

def most_classes(teacher_dict):
  max_count = 0
  teacher_name = None
  for name in teacher_dict:
    if len(teacher_dict[name]) > max_count:
      max_count = len(teacher_dict[name])
      teacher_name = name
  return teacher_name, max_count

Ok, I asked too soon!

The expected answer was just the teacher name so I simply removed "max_count" from the return statement.

However, the question still stands! Why does the "Bummer" error message state that the function returns "('Jason Seifer', 7)" when in fact it returns "('Jason Seifer', 3)"?

Maybe Kenneth can respond to that one!

1 Answer

Kenneth Love
Kenneth Love
Treehouse Guest Teacher

Because Jason has 7 courses in the dictionary that the challenge validator sends to your code. The example is exactly that, an example. It's not the actual, real data that's used in the challenge.