code: def wav_scp_str(self, sample_rate=None):
      if sample_rate is not None:
          return "{} sox {} -t wav -r {} - |".format(
              self.recording_id(), self.wav_path, sample_rate
          )
      else:
          return "{} {}".format(self.recording_id(), self.wav_path)
  
imports: import argparse
  import os
  import re
  import sys
  from collections import namedtuple
  import yaml
label_desc: Use image node_id 2 for calling the JKACPath obj's underlying member method code with example usage: obj.wav_scp_str(sample_rate) and returns: str, str