code: def next(self):
      print(
          "{} next, open {} close {}".format(
              self.data.datetime.date(),
              self.data.open[0],
              self.data.close[0],
          )
      )
  
      if self.cheating:
          return
      self.operate(fromopen=False)
  
file_path: backtrader/samples/cheat-on-open/cheat-on-open.py
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import argparse
  import datetime
  import backtrader
label_desc: Use image node_id 4 for calling the St obj's underlying member method code with example usage: obj.next() without return types