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:param hashes: A dict of algorithm names pointing to lists of allowed
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� | j | k r� d Sq� W| j | � d S( s� Check good hashes against ones built from iterable of chunks of
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Raise HashMismatch if none match.
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t | j � S( s, Return whether I know any known-good hashes.( t boolR
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MissingHashesc B@ s e Z d Z d � Z d � Z RS( s� A workalike for Hashes used when we're missing a hash for a requirement
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