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Python Python Collections (2016, retired 2019) Dictionaries Teacher Stats

Byron Farrell
Byron Farrell
5,700 Points
Posted by Byron Farrell
Byron Farrell
5,700 Points

Error

Getting error: Bummer: Couldn't find `num_teachers

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(var):
    return count(var.keys())
csr13
csr13
33,292 Points
csr13
csr13
33,292 Points

Use the len() method instead of the count method on the keys of var:

return len(var.keys())

Also, always check for any extra unintentional whitespaces You can try the count method on your local interpreter to see why is not working with count. :star:

1 Answer

matth89
matth89
17,826 Points

You're close. I believe it's the len() function you're looking for, rather than count. So, if you change your return statement to be 

return len(var)

it will pass. In case you'd like to read up on the difference between len and count: https://stackoverflow.com/questions/26563027/what-is-the-difference-between-len-and-count-in-python