code: def next(self):
      print(
          "%03d %f %f, %f"
          % (
              len(self),
              self.data.optix_close[0],
              self.data.lines.optix_pess[0],
              self.data.optix_opt[0],
          )
      )
  
file_path: backtrader/samples/data-pandas/data-pandas-optix.py
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import argparse
  import backtrader
  import backtrader.feeds
  import pandas
label_desc: Use image node_id 1 for calling the StrategyOptix obj's underlying member method code with example usage: obj.next() without return types