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# tests for correct PEP479 behaviour (introduced in Python 3.5)
# basic case: StopIteration is converted into a RuntimeError
def gen():
yield 1
raise StopIteration
g = gen()
print(next(g))
try:
next(g)
except RuntimeError:
print('RuntimeError')
# trying to continue a failed generator now raises StopIteration
try:
next(g)
except StopIteration:
print('StopIteration')
# throwing a StopIteration which is uncaught will be converted into a RuntimeError
def gen():
yield 1
yield 2
g = gen()
print(next(g))
try:
g.throw(StopIteration)
except RuntimeError:
print('RuntimeError')
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