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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 delta_encode(data, axis=-1, out=None):
 """Encode Delta."""

    if isinstance(data, (bytes, bytearray)):
        data = numpy.frombuffer(data, dtype='u1')
        diff = numpy.diff(data, axis=0)
        return numpy.insert(diff, 0, data[0]).tobytes()

    dtype = data.dtype
    if dtype.kind == 'f':
        data = data.view('u%i' % dtype.itemsize)

    diff = numpy.diff(data, axis=axis)
    key = [slice(None)] * data.ndim
    key[axis] = 0
    diff = numpy.insert(diff, 0, data[tuple(key)], axis=axis)

    if dtype.kind == 'f':
        return diff.view(dtype)
    return diff