How to use the topojson.topology.topology function in topojson

def convert(geojson,topojson=None,object_name=False, *args, **kwargs):
    if isinstance(geojson,dict):
        input_dict = geojson
    elif isinstance(geojson,str):
        inFile = open(geojson)
        input_dict = load(inFile)
        if not object_name and 'type' in input_dict and hasattr(inFile,'name') and inFile.name.lower().endswith('.geojson'):
            input_dict = {inFile.name[:-8].split('/')[-1]:input_dict}
    elif isinstance(geojson, io.TextIOWrapper):
        input_dict=load(geojson)
    if 'type' in input_dict:
        if object_name:
            input_dict = {object_name:input_dict}
        else:
            input_dict = {'name':input_dict}
    output_dict = topology(input_dict, *args, **kwargs)
    if isinstance(topojson,str) or isinstance(topojson, str):
        with open(topojson,'w') as f:
            dump(output_dict,f)
    elif isinstance(topojson, io.TextIOWrapper):
        dump(output_dict,topojson)
    else:
        return output_dict