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|
| 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])
|
|
