code: def __str__(self):
      txt = []
      txt.append("sar: {}".format(self.sar))
      txt.append("tr: {}".format(self.tr))
      txt.append("af: {}".format(self.af))
      txt.append("ep: {}".format(self.ep))
      return "\n".join(txt)
  
file_path: backtrader/backtrader/indicators/psar.py
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  from .None import PeriodN
label_desc: Use image node_id 1 for calling the _SarStatus obj's underlying member method code with example usage: obj.__str__() and returns: str