I'm getting a Type Error on Challenge Task 1 of 5

Question

This is the error that I am getting:
 TypeError: num_teachers() takes 0 positional arguments but 1 was given
```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(**numberofTeachers):
    for teachers in numberofTeachers.key():
        return numberofTeachers.count(key)
```

jonlunsford · Answer

Your function is expecting keyword arguments such as:
python
num_teachers(name='Ken', classes=['Python', 'Collections'])

not positional arguments such as:
python
num_teachers(dict)

I can't tell from your code, but my guess is you are trying to pass in a dictionary which is a positional argument since it is not unpacked by Python.  Here's how I would handle the assignment:
python
def num_courses(teachers):
for key in teachers:
courses = len(teachers[key])
print("{} teaches {} courses.".format(key, courses))

then call the function using the teachers dictionary:
python
data = {'Andrew Chalkley': ['jQuery Basics', 'Node.js Basics'], 'Kenneth Love': ['Python Basics', 'Python Collections']}
num_courses(data)

the output would look like the following:
python
Kenneth Love teaches 2 courses.
Andrew Chalkley teaches 2 courses.

This is assuming you are counting classes for each teacher.  From this you should be able to revise your code for counting the number of teachers.

Tonye Jack · Answer

Easy one liners to solve it will be these reply if you need more explanation
```python
numteachers = lambda arg: len(arg.keys())
numcourses = lambda arg: sum([len(c) for c in arg.values()])
courses = lambda arg: [c for s in arg.values() for c in s]
most_courses = lambda arg: [t for t, c in sorted(arg.items(), key=lambda a: len(a[1]), reverse=True)][0]
stats = lambda arg: [[t, len(c)] for t, c in arg.items()]
```

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DaJuan Harris

DaJuan Harris

I'm getting a Type Error on Challenge Task 1 of 5

2 Answers

Tonye Jack

Tonye Jack

jonlunsford

jonlunsford