<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def read(self, frames=-1, dtype='float64', always_2d=False, fill_value=None, out=None):
 """Read from the file and return data as NumPy array. 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'}, optional Data type of the returned array, by default ``'float64'``. Floating point audio data is typically in the range from ``-1.0`` to ``1.0``. Integer data is in the range from ``-2**15`` to ``2**15-1`` for ``'int16'`` and from ``-2**31`` to ``2**31-1`` for ``'int32'``. .. note:: Reading int values from a float file will *not* scale the data to [-1.0, 1.0). If the file contains ``np.array([42.6], dtype='float32')``, you will read ``np.array([43], dtype='int32')`` for ``dtype='int32'``. Returns ------- audiodata : numpy.ndarray or type(out) A two-dimensional NumPy (frames x channels) array is returned. If the sound file has only one channel, a one-dimensional array is returned. Use ``always_2d=True`` to return a two-dimensional array anyway. If `out` was specified, it is returned. If `out` has more frames than available in the file (or if `frames` is smaller than the length of `out`) and no `fill_value` is given, then only a part of `out` is overwritten and a view containing all valid frames is returned. numpy.ndarray or type(out) Other Parameters always_2d : bool, optional By default, reading a mono sound file will return a one-dimensional array. With ``always_2d=True``, audio data is always returned as a two-dimensional array, even if the audio file has only one channel. fill_value : float, optional If more frames are requested than available in the file, the rest of the output is be filled with `fill_value`. If `fill_value` is not specified, a smaller array is returned. out : numpy.ndarray or subclass, optional If `out` is specified, the data is written into the given array instead of creating a new array. In this case, the arguments `dtype` and `always_2d` are silently ignored! If `frames` is not given, it is obtained from the length of `out`. Examples -------- Reading 3 frames from a stereo file: array([[ 0.71329652, 0.06294799], [-0.26450912, -0.38874483], [ 0.67398441, -0.11516333]]) See Also -------- buffer_read, .write """

        if out is None:
            frames = self._check_frames(frames, fill_value)
            out = self._create_empty_array(frames, always_2d, dtype)
        else:
            if frames < 0 or frames > len(out):
                frames = len(out)
        frames = self._array_io('read', out, frames)
        if len(out) > frames:
            if fill_value is None:
                out = out[:frames]
            else:
                out[frames:] = fill_value
        return out