csv to json or vice versa convertor without any package

csv-to-json.py

class make_double(str): # makes double quote
    def __repr__(self):
        return ''.join(('"', super().__repr__()[1:-1], '"'))


def csv_to_json(csvFile, jsonFile):
    with open(csvFile, "r") as f:
        first_line =  f.readline().rstrip().split(",")
        with open(jsonFile, "w", encoding='utf-8') as w:
            s = []
            for i in f.readlines():
                dux = {}
                line = i.strip().split(',')
                for a, b in enumerate(line):
                    replaced = b.replace(" ", "")
                    if replaced.isdigit():
                        dux[make_double(first_line[a])] = int(replaced)
                    else:
                        dux[make_double(first_line[a].strip())] = make_double(b.strip())
                s.append(dux)
            w.write(str(s))

csv_to_json('homes.csv', 'data.json') 
          

def json_to_csv(jsonFile, csvFile):
    with open(jsonFile, "r") as f:
        json = eval(f.read())
        keys = json[0]
        with open(csvFile, "w") as w:
            w.write(','.join([i for i in keys.keys()]))
            for i in json:
                values = ','.join([str(item) for item in i.values()])
                a = f"{values}\n"
                w.write(a)

               
json_to_csv("data.json", "result.csv")