Triple plays (mostly) all around
Prizes can be shared, even by more than two laureates. In fact, all prize categories but one – literature – have had prizes shared by three or more laureates.
Este exercício faz parte do curso
Introduction to MongoDB in Python
Instruções do exercício
- Save a filter document
criteriathat, when passed todb.prizes.distinct, returns all prize categories shared by three or more laureates. That is,"laureates.2"must exist for such documents. - Save these prize categories as a Python
setcalledtriple_play_categories. - Confirm via an assertion that "literature" is the only prize category with no prizes shared by three or more laureates.
Exercício interativo prático
Experimente este exercício completando este código de exemplo.
# Save a filter for prize documents with three or more laureates
criteria = {____: {____: ____}}
# Save the set of distinct prize categories in documents satisfying the criteria
triple_play_categories = ____(db.prizes.distinct(____, criteria))
# Confirm literature as the only category not satisfying the criteria.
assert set(db.prizes.distinct(____)) - triple_play_categories == {____}