我使用Zipline-1.1.1,Python3.4.6创建动态股票选择器,如下所示:
from zipline.pipeline import Pipeline, engine
from zipline.pipeline.factors import AverageDollarVolume, Returns
def make_pipeline():
dollar_volume = AverageDollarVolume(window_length=1)
high_dollar_volume = dollar_volume.percentile_between(N, 100)
recent_returns = Returns(window_length=N, mask=high_dollar_volume)
low_returns = recent_returns.percentile_between(0, n)
high_returns = recent_returns.percentile_between(N, 100)
pipe_columns = {
'low_returns': low_returns,
'high_returns': high_returns,
'recent_returns': recent_returns,
'dollar_volume': dollar_volume
}
pipe_screen = (low_returns | high_returns)
pipe = Pipeline(columns=pipe_columns, screen=pipe_screen)
return pipe
我用:
初始化一个管道对象my_pipe = make_pipeline()
但是当我尝试填充Pipeline时,它失败了:
result = engine.PipelineEngine.run_pipeline(my_pipe, '2017-07-10', '2017-07-11')
Traceback (most recent call last):
File "<input>", line 1, in <module>
result = engine.PipelineEngine.run_pipeline(my_pipe, '2017-07-10', '2017-07-11')
TypeError: run_pipeline() missing 1 required positional argument: 'end_date'
我无法弄清楚出了什么问题,非常感谢任何帮助。
答案 0 :(得分:0)
如果我理解正确,您正在使用this库。
据我所知,为了能够使用run_pipeline
方法,您必须instantiate之前使用管道引擎,例如SimplePipelineEngine
。你需要它,因为PipelineEngine
是一个类,甚至是抽象类,而不是一个对象。
因此,您必须创建SimplePipelineEngine
类的对象,然后在其上调用run_pipeline
。你可以这样做:
your_engine = SimplePipelineEngine(get_loader=your_loader, calendar=your_calendar, asset_finder=your_asset_finder)
your_eninge.run_pipeline(my_pipe, '2017-07-10', '2017-07-11')
当然,您必须先创建your_loader
等。
Here是SimplePipelineEngine
用法的示例。我希望它会有所帮助。