code: def start(self):
      self.callcounter = 0
      txtfields = list()
      txtfields.append("Calls")
      txtfields.append("Len Strat")
      txtfields.append("Len Data")
      txtfields.append("Datetime")
      txtfields.append("Open")
      txtfields.append("High")
      txtfields.append("Low")
      txtfields.append("Close")
      txtfields.append("Volume")
      txtfields.append("OpenInterest")
      print(",".join(txtfields))
  
      self.lcontrol = 0  # control if 1st or 2nd call
      self.inmarket = 0
  
      # Get the highest but delayed 1 ... to avoid "today"
      self.highest = btind.Highest(
          self.data.high, period=self.p.highperiod, subplot=False
      )
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import argparse
  import datetime
  import backtrader
  import backtrader.indicators
label_desc: Use image node_id 2 for calling the St obj's underlying member method code with example usage: obj.start() without return types