Chaining & Context Managers

Preview — 3 of 10 questions

What is the output of the following code?

javascript

try:
    try:
        1 / 0
    except ZeroDivisionError as e:
        raise ValueError("invalid calculation") from e
except ValueError as e:
    print(e)
    print(e.__cause__)

Ainvalid calculation then division by zero

Binvalid calculation then None

CTypeError: raise ... from ... requires two exception instances

Ddivision by zero then invalid calculation

What is the output of the following code?

javascript

try:
    try:
        1 / 0
    except ZeroDivisionError:
        raise ValueError("invalid calculation")
except ValueError as e:
    print(e.__cause__)
    print(e.__context__)

ANone then None

Bdivision by zero then division by zero

CNone then division by zero

Ddivision by zero then None

What is the output of the following code?

javascript

from contextlib import contextmanager

@contextmanager
def timer_context():
    print("start")
    yield "timer object"
    print("end")

with timer_context() as t:
    print(f"using {t}")

Ausing timer object, start, end

Bstart, using timer object, end

Cstart, end, using timer object

DTypeError: contextmanager() missing required argument

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