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Python Programming - Generators - Discussion

Discussion Forum : Generators - General Questions (Q.No. 94)
Generators
94.
How does the itertools.cycle() function differ from using a loop with yield from to repeat elements of a generator?
They are equivalent in functionality
itertools.cycle() raises a ValueError when used with generators
itertools.cycle() continues indefinitely, while a loop with yield from stops when the generator is exhausted
A loop with yield from raises a StopIteration exception
Answer: Option
Explanation:
itertools.cycle() continues indefinitely, repeating elements of a generator. A loop with yield from stops when the generator is exhausted. 
def repeat_elements():
    while True:
        yield from [1, 2, 3]

gen_cycle = itertools.cycle([1, 2, 3])

# Equivalent behavior
result_cycle = [next(gen_cycle) for _ in range(10)]
result_loop = [next(repeat_elements()) for _ in range(10)]

print(result_cycle)  # Output: [1, 2, 3, 1, 2, 3, 1, 2, 3, 1]
print(result_loop)   # Output: [1, 2, 3, 1, 2, 3, 1, 2, 3, 1]
Discussion:
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