human
Solve the following python programming problem given the following code:
def CheckTwoThreads(self) : 
    def reader(dbpath) : 
        reader = sqlite.connect (dbpath, timeout = 2000) 
        cu = reader.cursor () 
        while True : 
            l = [x for x in cu.execute ('SELECT * from foo')] 
            if (l == [None]) : 
                break 
thread.exit () 
(fd, dbfile) = tempfile.mkstemp () 
    os.close (fd) 
    writer = sqlite.connect (writer, timeout = 500) 
    cu = writer.cursor () 
    cu.execute ('CREATE TABLE foo(bar int)') 
    writer.commit () 
    thread.start_new_thread (reader, (dbfile,)) 
    for i in xrange (100) : 
        cu.execute ('INSERT INTO foo values(?)', (i,)) 
        if ((i % 10) == 0) : 
            writer.commit () 
if ((i % 20) == 0) : 
            cu.execute ('DELETE FROM foo') 
            writer.commit () 
cu.execute ('INSERT INTO foo VALUES(NULL)') 
    writer.commit () 

    
    

    Fix the buggy line: writer = sqlite.connect (writer, timeout = 500)
assistant
#Here is Python program to fix the buggy line: writer = sqlite.

writer = sqlite.connect (dbfile, timeout = 500)