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Python Functional Python The Lambda Lambada Recursion

peterbristow
peterbristow
10,403 Points
Posted by peterbristow
peterbristow
10,403 Points

Hi, Sorry, I think I am close to the right answer but I have not idea on how to change my code to do so. Please help.

Would you please show me the correct answer?

courses.py 
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 = set()
    pres.add(data['prereqs'][0]['title'])
    prereqs(data['prereqs'][0])
    return pres

1 Answer

Alx Ki
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.a{fill-rule:evenodd;}techdegree seal-36
Alx Ki
Python Web Development Techdegree Graduate 14,822 Points
Alx Ki
.a{fill-rule:evenodd;}techdegree seal-36
Alx Ki
Python Web Development Techdegree Graduate 14,822 Points

Hi, Peter Bristow Try to follow these steps:

def prereqs(data, pres=None):
    pres = set()
    # iterate through all of the prereqs in data's prereqs
    # add all prereq titles
    # call your function again with (data, pres)
    return pres

Let me know if it helps! :)