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t i c C si d d l } | | j | | j � | | j | � t | � f } | rU t j | � n t j d | � d S( s� Insert an entry into the list of warnings filters (at the front).
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c C sE | d | d t | � f } | r1 t j | � n t j d | � d S( s� Insert a simple entry into the list of warnings filters (at the front).
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