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Python Functional Python The Lambda Lambada Recursion

Why isn't my code working?

Am I misunderstanding something?

courses = {'count': 2,
           'title': 'Django Basics',
           'prereqs': [{'count': 3,
                     'title': 'Object-Oriented Python',
                     'prereqs': [{'count': 1,
                               'title': 'Python Collections',
                               'prereqs': [{'count':0,
                                         'title': 'Python Basics',
                                         'prereqs': []}]},
                              {'count': 0,
                               'title': 'Python Basics',
                               'prereqs': []},
                              {'count': 0,
                               'title': 'Setting Up a Local Python Environment',
                               'prereqs': []}]},
                     {'count': 0,
                      'title': 'Flask Basics',
                      'prereqs': []}]}

def prereqs(data, pres=None):
    pres = pres or set()

    if len(data['prereqs']) > 0: 
        return prereqs(data['prereqs'], pres)
        return pres

1 Answer

Hey there,

You need to implement your recursive functional call into a nested for loop. See the following link that had some significant coverage.