def _walker(self, path):
        """Walk a directory tree (optionally recursively)"""
        for root, dnames, fnames in _walk(self.recursion)(path):
            yield (root, dnames, fnames)
def _walker ( self , path ) : for root , dnames , fnames in _walk ( self . recursion ) ( path ) : yield ( root , dnames , fnames )
Walk a directory tree (optionally recursively)