Exercise: Generators

Questions for: Generators

What happens if the generator.throw(ValueError) method is called without specifying an exception value?
A:
It raises a ValueError with a default message
B:
It raises a TypeError
C:
It has no effect on the running generator
D:
It raises a StopIteration exception
Answer: B
Calling generator.throw(ValueError) without specifying an exception value raises a TypeError, as the exception value is mandatory.
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How does the generator.throw(StopIteration, value) method affect a running generator?
A:
It stops the generator and raises a StopIteration exception with the specified value
B:
It continues the generator's execution with the specified value
C:
It has no effect on the running generator
D:
It raises a ValueError with the specified value
Answer: A
generator.throw(StopIteration, value) stops the generator and raises a StopIteration exception with the specified value.
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How does the generator.throw(GeneratorExit) method differ from generator.close()?
A:
They are equivalent in functionality
B:
generator.throw(GeneratorExit) raises a GeneratorExit exception in the generator, while generator.close() terminates the generator
C:
generator.close() raises a GeneratorExit exception, while generator.throw(GeneratorExit) terminates the generator
D:
generator.throw(GeneratorExit) and generator.close() are not valid methods
Answer: B
generator.throw(GeneratorExit) raises a GeneratorExit exception in the generator, indicating that the generator should be closed. generator.close() terminates the generator without raising an exception.
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How does the itertools.count() function differ from using range()?
A:
They are equivalent in functionality
B:
itertools.count() generates an infinite sequence, while range() creates a finite sequence
C:
range() generates an infinite sequence, while itertools.count() creates a finite sequence
D:
itertools.count() raises a StopIteration exception when exhausted, while range() does not
Answer: B
itertools.count() generates an infinite sequence of numbers, while range() creates a finite sequence of numbers.
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How does the generator.throw() method differ from the generator.close() method?
A:
They are equivalent in functionality
B:
generator.throw() raises a specific exception in the generator, while generator.close() terminates the generator
C:
generator.close() raises a StopIteration exception, while generator.throw() terminates the generator
D:
generator.throw() raises a StopIteration exception, while generator.close() terminates the generator
Answer: B
generator.throw() raises a specific exception in the generator, while generator.close() terminates the generator by raising a GeneratorExit exception.
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