Which Notes Mention It? — medium Python for AI problem | Incognition

Which Notes Mention It?

10 pts · 10 coins

Python for AIMedium

Which Notes Mention It?

A search box needs to know, for every word, which notes it appears in.

Task: write build_index(notes). notes is a list of text notes; note 0 is the first one. Return a dictionary mapping each word to a sorted list of the note numbers it appears in.

Split each note into words on spaces. There's no punctuation.
Ignore capitals: use small letters for every word.
A note number appears once per word, even if the word is repeated inside that note.
Return a plain dictionary. No notes means {}.

Examples

notes = ["Buy milk", "milk and eggs milk", "Eggs"]

returns {'buy': [0], 'milk': [0, 1], 'and': [1], 'eggs': [1, 2]}

notes = ["hello"]

returns {'hello': [0]}

Hints

solution.py

1def build_index(notes):
2    # your code here
3    pass
4