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files >> //opt/hc_python/lib64/python3.8/site-packages/greenlet/tests/test_generator.py
from greenlet import greenlet from . import TestCase class genlet(greenlet): parent = None def __init__(self, *args, **kwds): self.args = args self.kwds = kwds def run(self): fn, = self.fn fn(*self.args, **self.kwds) def __iter__(self): return self def __next__(self): self.parent = greenlet.getcurrent() result = self.switch() if self: return result raise StopIteration next = __next__ def Yield(value): g = greenlet.getcurrent() while not isinstance(g, genlet): if g is None: raise RuntimeError('yield outside a genlet') g = g.parent g.parent.switch(value) def generator(func): class Generator(genlet): fn = (func,) return Generator # ____________________________________________________________ class GeneratorTests(TestCase): def test_generator(self): seen = [] def g(n): for i in range(n): seen.append(i) Yield(i) g = generator(g) for _ in range(3): for j in g(5): seen.append(j) self.assertEqual(seen, 3 * [0, 0, 1, 1, 2, 2, 3, 3, 4, 4])
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