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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def buffer_read(self, frames=-1, dtype=None):
 """Read from the file and return data as buffer object. Reads the given number of `frames` in the given data format starting at the current read/write position. This advances the read/write position by the same number of frames. By default, all frames from the current read/write position to the end of the file are returned. Use :meth:`.seek` to move the current read/write position. Parameters frames : int, optional The number of frames to read. If `frames < 0`, the whole rest of the file is read. dtype : {'float64', 'float32', 'int32', 'int16'} Audio data will be converted to the given data type. Returns ------- buffer A buffer containing the read data. See Also -------- buffer_read_into, .read, buffer_write """

        frames = self._check_frames(frames, fill_value=None)
        ctype = self._check_dtype(dtype)
        cdata = _ffi.new(ctype + '[]', frames * self.channels)
        read_frames = self._cdata_io('read', cdata, ctype, frames)
        assert read_frames == frames
        return _ffi.buffer(cdata)