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

Kade Carlson
Kade Carlson
5,928 Points
Posted by Kade Carlson
Kade Carlson
5,928 Points

This one has got me stumped

Not sure what to do here. Kind of difficult

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(val):
    for prop in val:
        return len(val)

def num_courses(val):
    course = 0
    for item in val.values():
        course += len(item)
    return course

def courses(val):
    all_courses = []
    for prop in val:
        all_courses.extend(val[prop])
    return all_courses

def most_courses(val):
    for prop in val:
        v = max(len(val.values()))
    return prop[v]

1 Answer

Tonye Jack
seal-mask
.a{fill-rule:evenodd;}techdegree
Tonye Jack
Full Stack JavaScript Techdegree Student 12,469 Points
Tonye Jack
.a{fill-rule:evenodd;}techdegree
Tonye Jack
Full Stack JavaScript Techdegree Student 12,469 Points

Check this one liners to help

num_teachers = lambda arg: len(arg.keys())
num_courses = 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()]