60 lines
1.3 KiB
Python
60 lines
1.3 KiB
Python
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import unittest
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from greenlet import greenlet
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class genlet(greenlet):
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def __init__(self, *args, **kwds):
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self.args = args
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self.kwds = kwds
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def run(self):
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fn, = self.fn
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fn(*self.args, **self.kwds)
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def __iter__(self):
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return self
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def __next__(self):
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self.parent = greenlet.getcurrent()
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result = self.switch()
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if self:
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return result
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else:
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raise StopIteration
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# Hack: Python < 2.6 compatibility
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next = __next__
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def Yield(value):
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g = greenlet.getcurrent()
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while not isinstance(g, genlet):
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if g is None:
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raise RuntimeError('yield outside a genlet')
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g = g.parent
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g.parent.switch(value)
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def generator(func):
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class generator(genlet):
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fn = (func,)
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return generator
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# ____________________________________________________________
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class GeneratorTests(unittest.TestCase):
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def test_generator(self):
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seen = []
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def g(n):
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for i in range(n):
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seen.append(i)
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Yield(i)
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g = generator(g)
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for k in range(3):
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for j in g(5):
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seen.append(j)
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self.assertEqual(seen, 3 * [0, 0, 1, 1, 2, 2, 3, 3, 4, 4])
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