challenge 5 .. doing something silly

# The dictionary will look something like:
# {'Andrew Chalkley': ['jQuery Basics', 'Node.js Basics'],
#  'Kenneth Love': ['Python Basics', 'Python Collections']}
#
# Each key will be a Teacher and the value will be a list of courses.
#
# Your code goes below here.
def num_teachers(a_dict):
    num=0
    for teacher in a_dict:
        num += 1
    return num

def num_courses(teachers):
    return sum(len(v) for v in teachers.values())

def courses(a_dict):
    course_list = []
    for teachers in a_dict:
        for courses in a_dict[teachers]:
            course_list.append(courses)
    return course_list

def most_courses(a_dict):
  top_num = 0
  top_teacher = ''
  for teacher in a_dict:
      class_num = len(a_dict[teacher])
      if (class_num > top_num):
          top_num = class_num
          top_teacher = teacher
  return top_teacher

def stats(a_dict):
    i_list = []
    lof_lists = []
    for id in a_dict:
        i_list.append(key)
        i_list.append(len(a_dict[key]))
        lof_list.append(i_list)
    return lof_lists