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

Maximilian Richly
Maximilian Richly
4,872 Points

I get the wrong result ??

My code apparently gives me the wrong teacher name and I don't know why. Help please!

teachers.py
# 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(dictionary):
  for key in dictionary:
    for key_2 in dictionary:
      if len(dictionary[key]) > len(dictionary[key_2]):
        most = key
      else:
        most = key_2
  return most

1 Answer

Ankit Bindal
Ankit Bindal
2,830 Points

As far as I understood your problem, you want to return the teacher with maximum number of courses. But with this implementation, you will always get the teacher which comes last in the iteration and satisfies :

len(dictionary[key]) > len(dictionary[key_2])

You might want to do this:

most = dictionary.keys()[0]
for key in dictionary:
      if len(dictionary[key]) > len(dictionary[most]):
        most = key
return most
Maximilian Richly
Maximilian Richly
4,872 Points

Ahh, yes. Thank you, I understand.