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Alexis Douheret
852 PointsChallenge Task - My function is not found
Hi,
I'm at the last challenge task in the "Python collection" course of Kenneth Love, in the dictionary part. I have to create a function named "stats" that takes a dictionary ad single argument and returns a list of list containing each key and value.
My problem is following: An error saying "Bummer! Couldn't find 'stats'" is raised by the interface.
I tried to reindent the code of this function but it did not work out. I really don't see what could be the problem here... I think it's a silly mistake but I just don't see it!
Thank you for your help in advance!
Cheers,
Doht
PS: The course is really interesting and helps a lot for developers of intermediate level in Python
# 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 most_courses(teachers_courses):
lng=0
tc="no teacher"
for teacher in teachers_courses:
if len(teachers_courses[teacher])>lng:
lng=len(teachers_courses[teacher])
tc=teacher
return tc
def courses(teachers_courses):
lst=[]
for value in teachers_courses.values():
lst.extend(value)
return lst
def num_teachers(teachers_courses):
num=0
for key in teachers_courses:
num+=1
return num
def num_courses(teachers_courses):
num=0
for value in teachers_courses.values():
num+=len(value)
return num
def stats(teachers_courses):
lst=[]
for itm in teachers_courses.items():
lst.extend([teacher,len(teachers_courses[teacher])])
return lst
6 Answers
markmneimneh
14,132 PointsHi
Think the probe is here:
def stats(teachers_courses):
lst=[]
for itm in teachers_courses.items():
lst.extend([teacher,len(teachers_courses[teacher])])
return lst
you probably mean
for teacher in teachers_courses.items():
otherwise, how is the code to know what teacher,len..... is?
Alexis Douheret
852 PointsThis is a different problem!
Use .append() method instead of .extend()
Because you want to have a list of lists
Vedran Linić
Courses Plus Student 18,802 PointsSo i have try this code and it still don't work
def stats(teachers_courses):
maks = []
for teacher in teachers_courses.items():
maks.append([teacher, len(teachers_courses[teacher])])
return maks
i get error TypeError: unhashable type: 'list'
Alexis Douheret
852 PointsHello Mark,
Yes I saw that mistake after and once I corrected it, it worked and the challenge got completed But still, it's weird that the error raised said that my function could not be found ! My guess is because it didn't recognise "teacher", the code did not consider stats to be a function.
markmneimneh
14,132 Pointsglad you got it resolved.
Vedran Linić
Courses Plus Student 18,802 PointsI have try this code
def stats(teachers_courses):
lst=[]
for teacher in teachers_courses.items():
lst.extend([teacher, len(teachers_courses[teacher])])
return lst
but i still get error TypeError: unhashable type: 'list'