human
Solve the following python programming problem given the following code:
def main() : 
    io_loop = ioloop.IOLoop.instance () 
    options.parse_command_line () 
    geoproc = GeoProcessor () 
    geolookup = GeoLookup (io_loop, geoproc) 
    def _OnRefresh() : 
        geolookup.SaveDB () 
        io_loop.stop () 
geolookup.RefreshDB (io_loop) 
    io_loop.start () 
    return 0 

    
    

    Fix the buggy line: geolookup.RefreshDB (io_loop)
assistant
#Here is Python program to fix the buggy line: geolookup.

geolookup.RefreshDB (def _OnRefresh()