courses function in Python Collections challenge

Question

Hi, just wanted to get some help on the last function, it says my code is only returning 5 courses but expects 18 - I'm not too sure how to trouble shoot it. In my workspaces, it seems to react fine when I add in additional teachers and courses to a test dictionary.

Thanks for any help in advance!

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(dict):
  max_classes = 0
  for teacher in dict:
    classes = len(dict[teacher])    #returns the length of the value in each key
    if(classes>max_classes):
      max_classes = classes
      most_classes = teacher

  return most_classes

def num_teachers(dict):
  return len(dict)

def stats(dict):
  list = [[] for i in range(len(dict))]
  j = 0
  for key in dict:
      list[j].append(key)
      list[j].append(len(dict[key]))
      j=j+1
  return list

def courses(dict):
  course_list = []
  for teacher in dict:
    course_list.append(dict[teacher])

  return course_list

Answer 1 · 2015-05-27T15:18:44Z

May 27, 2015 3:18pm

def courses(dict):
  course_list = []
  for teacher in dict.keys():
    for course in dict[teacher]:
      course_list.append(course)

  return course_list

The problem is the dictionary follows this format:

{name: [courses]}

You were looping through each teacher then appending the list to course_list so course_list looked liked this: [[course1,course2],[course3,course4]]

. But you also have to loop through each course for each teacher aswell so your course_list looks like this: [course1,course2,course3,course4]

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Yeeka Yau

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courses function in Python Collections challenge

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Charlie Thomas

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