def _is_available(self, j):
    'Return True if the index j is available in the table.'
    return ((self._table[j] is None) or (self._table[j] is ProbeHashMap._AVAIL))
Return True if the index j is available in the table.
def _is_available(self, j):
    
    return ((self._table[j] is None) or (self._table[j] is ProbeHashMap._AVAIL))