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# Task 4 of teachers.py no longer passing after editing code for task 5?

Did I use a string or something somewhere that contradicts with the previous task?

teachers.py
```# 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(dic):
return len(dic)

def num_courses(dic):
total = 0
for i in dic:
total += len(dic[i])

def courses(dic):
thing = []
for value in dic.values():
thing += value
return thing

def most_courses(dic):
max_count = 0
teacher_most_classes = " "
for key in dic:
if len(dic[key]) > max_count:
max_count = len(dic[key])
teacher_most_classes = key
return key

def stats(dic):
outer_list = []
for key in dic:
inner_list = []
inner_list.append(key)
inner_list.append(len(dic[key]))
outer_list.append(inner_list)
return outer_list
```