code: def next(self):
      print(
          "Strategy len {} datetime {}".format(
              len(self), self.datetime.datetime()
          ),
          end=" ",
      )
  
      print(
          "Data0 len {} datetime {}".format(
              len(self.data0), self.data0.datetime.datetime()
          ),
          end=" ",
      )
  
      if len(self.data1):
          print(
              "Data1 len {} datetime {}".format(
                  len(self.data1), self.data1.datetime.datetime()
              )
          )
      else:
          print()
  
file_path: backtrader/samples/tradingcalendar/tcal-intra.py
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import argparse
  import datetime
  import backtrader
label_desc: Use image node_id 3 for calling the St obj's underlying member method code with example usage: obj.next() without return types