class_docstr: An AIFF, WAV, or Au file that can be read by the Python standard
  library modules ``wave``, ``aifc``, and ``sunau``.
class_docstr_tok: ["An","AIFF",",","WAV",",","or","Au","file","that","can","be","read","by","the","Python","standard","library","modules","``","wave","``",",","``","aifc","``",",","and","``","sunau","``","."]
docstr: Length of the audio in seconds (a float).
docstr_tok: ["Length","of","the","audio","in","seconds","(","a","float",")","."]
code: def duration(self):
      """Length of the audio in seconds (a float)."""
      return float(self._file.getnframes()) / self.samplerate
  
imports: import aifc
  import audioop
  import struct
  import sunau
  import wave
  from .exceptions import DecodeError
  from .base import AudioFile
label_desc: Use image node_id 6 for calling the RawAudioFile obj's underlying member method code with example usage: obj.duration() and returns: unknown