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    def __init__(self, basedir):
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        self._basedir = basedir
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    def _path(self, id):
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        if '\\' in id or '/' in id:
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            raise ValueError("invalid store id %r" % id)
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        return os.path.join(self._basedir, id)
 
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    def _path(self, entry_id):
 
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        if not isinstance(entry_id, basestring):
 
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            raise TypeError(type(entry_id))
 
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        if '\\' in entry_id or '/' in entry_id:
 
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            raise ValueError("invalid store id %r" % entry_id)
 
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        return os.path.join(self._basedir, entry_id)
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    def __repr__(self):
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        return "%s(%r)" % (self.__class__.__name__, self._basedir)