code: def before_trading_start(context, data):
      context.pipeline_data = pipeline_output("my_pipeline")
  
file_path: zipline/zipline/examples/momentum_pipeline.py
imports: from six import viewkeys
  from zipline.api import attach_pipeline, date_rules, order_target_percent, pipeline_output, record, schedule_function
  from zipline.finance import commission, slippage
  from zipline.pipeline import Pipeline
  from zipline.pipeline.factors import RSI
label_desc: Use image node_id 4 for calling a global function with example usage: before_trading_start(context, data) without return types