human
Solve the following python programming problem given the following code:
def extractErrorMessagesFromLogfile(logfile, targetDir) : 
    try : 
        lineNumber = 0 
        curBlock = [] 
        output = [] 
        def contains(msg) : 
            return ((' ERROR ' in msg) or (' CRITICAL ' in msg)) 
for line in open (logfile, 'r') : 
            lineNumber += 1 
            if ((line [0] in (' ', '\t')) or (not curBlock)) : 
                curBlock.append (line.rstrip ()) 
else : 
                if contains ('
'.join (curBlock)) : 
                    output.append ('
'.join (curBlock)) 
curBlock = [] 
                curBlock.append (line.rstrip ()) 
if contains ('
'.join (curBlock)) : 
            output.append ('
'.join (curBlock)) 
if output : 
            fname = os.path.split (logfile) [1] 
            finalFname = os.path.join (o, (fname + '_errors.txt')) 
            with open (finalFname, 'w') as resultFile : 
                for o in output : 
                    ((print >> resultFile), o) 
logging.info ('Checked %s lines of %s to produce %s lines of error messages in %s', lineNumber, logfile, len (output), finalFname) 
else : 
            logging.info ('Checked %s lines of %s, but found no error messages', lineNumber, logfile) 
except : 
        logging.error ('Failed to extract error messages from %s:
%s', logfile, traceback.format_exc ()) 

    
    

    Fix the buggy line: finalFname = os.path.join (o, (fname + '_errors.txt'))
assistant
#Here is Python program to fix the buggy line: finalFname = os.

finalFname = os.path.join (targetDir, (fname + '_errors.txt'))