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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def __query_options(self):
 """Get the query options string to use for this query."""

        options = 0
        if self.__tailable:
            options |= _QUERY_OPTIONS["tailable_cursor"]
        if self.__slave_okay or self.__pool._slave_okay:
            options |= _QUERY_OPTIONS["slave_okay"]
        if not self.__timeout:
            options |= _QUERY_OPTIONS["no_timeout"]
        return options