missing 1 positional argument.

# 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(dicts):
  my_dict = {}

  for i, j in dicts.items():
#       print i
        my_dict[i] = i
#       print my_dict[i]
        count = 0
      # add i as the value in our own dictionary
        for k in j:
      #     print k
            count += 1
      # print count 
        my_dict[i] = count

  return max(my_dict, key=my_dict.get)

def num_teachers(teachers):


    max_count = 0
    max_count = len (teachers)

    return max_count

def stats(dicts):   

    list_of_lists = []
    stat_list = []

    for i, j in dicts.items():
        count = 0
        for k in j:
            count += 1
        stat_list = [i,count]
        list_of_lists.append (stat_list)

    return list_of_lists    

def courses(dicts, teachers):

    course_list = []

    for i, j in teachers.items():
    #   print dicts[j]
        course_list.extend(dicts[j])

#   print course_list

    return course_list