human
Solve the following python programming problem given the following code:
def _InsertValues(self, values, callback) : 
    "Inserts values into datastore via the tornado web server and
    invokes callback with the sequence of values when complete. The
    values are randomly distributed over the available shards.

    - The key of each value is computed as: 'k%d' % value
    " 
    def _VerifyResponse(cb, resp) : 
        self.assertEqual (resp.body, 'ok') 
        cb () 
with util.Barrier (callback) as b : 
        for val in values : 
            self.http_client.fetch (httpclient.HTTPRequest (self.get_url ('/datastore'), method = 'POST', body = ('k=k%d&v=%d' % (self, val))), callback = partial (_VerifyResponse, b.Callback ())) 

    
    

    Fix the buggy line: self.http_client.fetch (httpclient.HTTPRequest (self.get_url ('/datastore'), method = 'POST', body = ('k=k%d&v=%d' % (self, val))), callback = partial (_VerifyResponse, b.Callback ()))
assistant
#Here is Python code to fix the buggy line: self.

self.http_client.fetch (httpclient.HTTPRequest (self.get_url ('/datastore'), method = 'POST', body = ('k=k%d&v=%d' % (val, val))), callback = partial (_VerifyResponse, b.Callback ()))