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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 stringify(obj):
 """ Return the string representation of an object. :param obj: object to get the representation of :returns: unicode string representation of `obj` or `obj` unchanged This function returns a string representation for many of the types from the standard library. It does not convert numeric or Boolean values to strings -- it only converts non-primitive instances such as :class:`datetime.datetime`. The following table describes the types that are handled and describes how they are represented. | Class | Behavior | +============================+============================================+ | :class:`uuid.UUID` | ``str(obj)`` | | :class:`datetime.datetime` | ``obj.strftime('%Y-%m-%dT%H:%M:%S.%f%z')`` | | :class:`memoryview` | ``obj.tobytes().decode('utf-8')`` | | :class:`bytearray` | ``bytes(obj).decode('utf-8')`` | | :class:`buffer` | ``bytes(obj).decode('utf-8')`` | | :class:`bytes` | ``obj.decode('utf-8')`` | Other types are returned unharmed. """

    out = obj
    if isinstance(obj, uuid.UUID):
        out = str(obj)
    elif hasattr(obj, 'strftime'):
        out = obj.strftime('%Y-%m-%dT%H:%M:%S.%f%z')
    elif isinstance(obj, memoryview):
        out = obj.tobytes()
    elif isinstance(obj, bytearray):
        out = bytes(obj)
    elif sys.version_info[0] < 3 and isinstance(obj, buffer):
        out = bytes(obj)

    if isinstance(out, bytes):
        out = out.decode('utf-8')

    return out