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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 identity_attributes(cls):
 """A list of the names of primary key fields. :returns: A list of the names of primary key fields :rtype: :class:`typing.Sequence`\ [:class:`str`] .. versionadded:: 1.0.0 """

        columns = inspect(cls).primary_key
        names = [c.name for c in columns if c.name not in ('width', 'height')]
        return names