human
Solve the following python programming problem given the following code:
def get_blobs_for_stream(self, stream_hash, start_blob = None, end_blob = None, count = None, reverse = False) : 
    log.info ('Getting blobs for a stream. Count is %s', str (start_blob)) 
    def get_positions_of_start_and_end() : 
        if (start_blob is not None) : 
            d1 = self._get_blob_num_by_hash (stream_hash, start_blob) 
else : 
            d1 = defer.succeed (None) 
if (end_blob is not None) : 
            d2 = self._get_blob_num_by_hash (stream_hash, end_blob) 
else : 
            d2 = defer.succeed (None) 
dl = defer.DeferredList ([d1, d2]) 
        def get_positions(results) : 
            start_num = None 
            end_num = None 
            if (results [0] [0] is True) : 
                start_num = results [0] [1] 
if (results [1] [0] is True) : 
                end_num = results [1] [1] 
return (start_num, end_num) 
dl.addCallback (get_positions) 
        return dl 
def get_blob_infos(nums) : 
        (start_num, end_num) = nums 
        return self._get_further_blob_infos (stream_hash, start_num, end_num, count, reverse) 
d = get_positions_of_start_and_end () 
    d.addCallback (get_blob_infos) 
    return d 

    
    

    Fix the buggy line: log.info ('Getting blobs for a stream. Count is %s', str (start_blob))
assistant
#Here is Python program to fix the buggy line: log.

log.info ('Getting blobs for a stream. Count is %s', str (count))