human
Solve the following python programming problem given the following code:
def n1qlQueryAll(self, * args, **kwargs) : 
    "
        Execute a N1QL query, retrieving all rows.

        This method returns a :class:`Deferred` object which is executed
        with a :class:`~.N1QLRequest` object. The object may be iterated
        over to yield the rows in the result set.

        This method is similar to :meth:`~couchbase.bucket.Bucket.n1ql_query`
        in its arguments.

        Example::

            def handler(req):
                for row in req:
                    # ... handle row

            d = cb.n1qlQueryAll('SELECT * from `travel-sample` WHERE city=$1`,
                            'Reno')
            d.addCallback(handler)

        :return: A :class:`Deferred`

        .. seealso:: :meth:`~couchbase.bucket.Bucket.n1ql_query`
        " 
    if (not cb.connected) : 
        cb = (lambda x : self.n1qlQueryAll (* args, ** kwargs)) 
        return self.connect ().addCallback (cb) 
kwargs ['itercls'] = BatchedN1QLRequest 
    o = super (RawBucket, self).n1ql_query (* args, ** kwargs) 
    o.start () 
    return o._getDeferred () 

    
    

    Fix the buggy line: if (not cb.connected) :
assistant
#Here is Python program to fix the buggy line: if (not cb.

if (not self.connected) :