code: def next(self):
      txt = ",".join(
          [
              "%04d" % len(self),
              "%04d" % len(self.data0),
              "%04d" % len(self.data1),
              self.data.datetime.date(0).isoformat(),
              "%.2f" % self.data0.close[0],
              "%.2f" % self.pp.s1[0],
              "%.2f" % self.sellsignal[0],
          ]
      )
  
      print(txt)
  
file_path: backtrader/samples/mixing-timeframes/mixing-timeframes.py
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import argparse
  import backtrader
  import backtrader.feeds
  import backtrader.indicators
  import backtrader.utils.flushfile
label_desc: Use image node_id 2 for calling the St obj's underlying member method code with example usage: obj.next() without return types