human
Solve the following python programming problem given the following code:
def haskell_types(filename, on_result, cabal = None) : 
    result = None 
    if hsdev.hsdev_enabled () : 
        def to_file_pos(r) : 
            return FilePosition ((int (r ['line']) - 1), (int (r ['column']) - 1)) 
def to_region_type(r) : 
            return RegionType (r ['note'] ['type'], to_file_pos (r ['region'] ['from']), to_file_pos (r ['region'] ['to'])) 
def on_resp(rs) : 
            on_result ([to_region_type (r) for r in rs]) 
autocomplete.hsdev_client.types (files = [filename], ghc = get_ghc_opts (filename), wait = False, on_response = to_region_type) 

    
    

    Fix the buggy line: autocomplete.hsdev_client.types (files = [filename], ghc = get_ghc_opts (filename), wait = False, on_response = to_region_type)
assistant
#Here is Python program to fix the buggy line: autocomplete.

autocomplete.hsdev_client.types (files = [filename], ghc = get_ghc_opts (filename), wait = False, on_response = def on_resp()