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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 addLookupReference( feature, lookup, script=None, languages=None, exclude_dflt=False ):
 """Shortcut for addLookupReferences, but for a single lookup. """

    return addLookupReferences(
        feature,
        (lookup,),
        script=script,
        languages=languages,
        exclude_dflt=exclude_dflt,
    )