forked from Lephenixnoir/PythonExtra
3f6ffe059f
This commit implements PEP479 which disallows raising StopIteration inside a generator to signal that it should be finished. Instead, the generator should simply return when it is complete. See https://www.python.org/dev/peps/pep-0479/ for details.
30 lines
617 B
Python
30 lines
617 B
Python
# tests for correct PEP479 behaviour (introduced in Python 3.5)
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# basic case: StopIteration is converted into a RuntimeError
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def gen():
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yield 1
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raise StopIteration
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g = gen()
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print(next(g))
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try:
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next(g)
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except RuntimeError:
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print('RuntimeError')
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# trying to continue a failed generator now raises StopIteration
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try:
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next(g)
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except StopIteration:
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print('StopIteration')
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# throwing a StopIteration which is uncaught will be converted into a RuntimeError
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def gen():
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yield 1
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yield 2
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g = gen()
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print(next(g))
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try:
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g.throw(StopIteration)
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except RuntimeError:
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print('RuntimeError')
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