def __init__(self, producer_func, stages, consumer_func, validator=validate):
'''constructs the pipeline'''
self._validator = validator
self._pipeline = consumer(consumer_func)
while stages:
self._pipeline = stage(stages.pop(), self._pipeline, self._validator)
self._pipeline = Producer(producer_func, self._pipeline, self._validator)
class Pipeline(object):
def __init__(self, producer_func, stages, consumer_func, validator=validate):
'''constructs the pipeline'''
self._validator = validator
self._pipeline = consumer(consumer_func)
while stages:
self._pipeline = stage(stages.pop(), self._pipeline, self._validator)
self._pipeline = Producer(producer_func, self._pipeline, self._validator)
def follow(self, initial_state):
res = []
try:
while True:
res.append(self._pipeline.send(initial_state))
except StopIteration:
self._pipeline.close()
return res