pipes:
  - example.pipes.ForwardReverse
  - example.pipes.Title

class ForwardReverse(object):
    def process_item(self, str_item, step_cnt_ctx):
        yield str_item
        yield str_item[::-1]
        step_cnt_ctx.count += 1
class Title(object):
    def process_item(self, str_item, step_cnt_ctx):
        yield str_item.title()
        step_cnt_ctx.count +=1

from pipeable.components import YamlPipelineConfigurator

class step_cnt_ctx(object):
    #example context object that is shared between pipes
    count = 0

pipe_line = YamlPipelineConfigurator.createPipeline(example_pipeline_config, step_cnt_ctx())
result = list(pipe_line.run(['foo', 'bar', 'baz']))
assert ['Foo', 'Oof', 'Bar', 'Rab', 'Baz', 'Zab'] == result
assert pipe_line.context.count == 9