Question 1 of 5
What does the T in def first[T](items: list[T]) -> T represent?
T is a type parameter declared by the function.
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Quiz
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Quick Check: Python Generic Type Parameters
Check your understanding of generic functions, classes, aliases, type-parameter scope, bounds, and defaults.
5 questions
~5 min
Knowledge check
Quick Check: Python Generic Type Parameters
Check your understanding of generic functions, classes, aliases, type-parameter scope, bounds, and defaults.
- Stuck? Each question has an optional hint.
- Skip a hard question and review it before your results.
- Questions and answer options can shuffle between attempts.
You can retake this quiz whenever you like.
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Question 2 of 5
Where can a class type parameter such as T be used?
The type parameter is in scope for the generic class body.
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Question 3 of 5
What happens to T after def identity[T](value: T) -> T is defined?
Type parameters have their own scope and are not ordinary names in the surrounding scope.
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Question 4 of 5
What does T: int specify in a type parameter list?
The colon introduces a bound expression for a TypeVar-style type parameter.
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Question 5 of 5
What does T = int in a type parameter list provide?
The equals sign introduces a default for the type parameter; it does not create a runtime function argument default.
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Quiz results
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Review
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What does the T in def first[T](items: list[T]) -> T represent?Hint used
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Where can a class type parameter such as T be used?Hint used
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What happens to T after def identity[T](value: T) -> T is defined?Hint used
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What does T: int specify in a type parameter list?Hint used
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What does T = int in a type parameter list provide?Hint used