59 lines
1.1 KiB
Python
59 lines
1.1 KiB
Python
import py
|
|
try:
|
|
from py.magic import greenlet
|
|
except RuntimeError, e:
|
|
py.test.skip(str(e))
|
|
|
|
|
|
|
|
class genlet(greenlet):
|
|
|
|
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
|
|
else:
|
|
raise StopIteration
|
|
|
|
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
|
|
|
|
# ____________________________________________________________
|
|
|
|
def test_generator():
|
|
seen = []
|
|
|
|
def g(n):
|
|
for i in range(n):
|
|
seen.append(i)
|
|
Yield(i)
|
|
g = generator(g)
|
|
|
|
for k in range(3):
|
|
for j in g(5):
|
|
seen.append(j)
|
|
|
|
assert seen == 3 * [0, 0, 1, 1, 2, 2, 3, 3, 4, 4]
|