for key in teacher_dict.keys():
   for value in teacher_dict.values():

def most_courses(arg):
    max_count = 0
    teachers = " "
    for teacher, listOfCourses in arg.items():
        if len(listOfCourses) > (max_count):
            max_count = len(listOfCourses)
            teachers = teacher
    return teachers

def most_courses(teacher_dict):
    max_count = 0
    rockstar = ""
    for teacher, course_list in teacher_dict.items():
        if len(course_list) > max_count:
            max_count = len(course_list)
            rockstar = teacher
    return rockstar

# 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(teacher_dict):
    count = 0
    for x in teacher_dict:
        count += 1
    return count

def num_courses(teacher_dict):
    value_list = []
    for values in teacher_dict.values():
        for x in values:
            value_list.append(x)

    return len(value_list)

def courses(teacher_dict):
    value_list = []
    for values in teacher_dict.values():
        for x in values:
            value_list.append(x)

    return value_list

def most_courses(teacher_dict): 
    most_course = 0
    #teacher = {"most_course: xxx}
    teacher = "XXXXXXXXX"  
    for key in teacher_dict.keys():
        #print(key): name of teachers

        for value in teacher_dict.values():
            #print(value): courses for each teacher 
            if len(value) > most_course:
                most_course = len(value):
                teacher = str(key)
    print("{} has the max # of course {}!".format(teacher, most_course)
    return teacher