Export contractDetails to df or csv from TWS API in Python?

Question

This question has actually already been asked and answered on another forum, howwwever, the answer was given through a web link and it appears as if that link has indeed expired. Thus I am forced to ask the question again to you lovely intelligent people.

Does anyone know how to export data from "contractDetails" to a df or a CSV file? This is the code so far:

class TestApp(EWrapper, EClient):
    def __init__(self):
        EWrapper.__init__(self)
        EClient.__init__(self, self)​

    def contractDetails(self, reqId, contractDetails):
        self.data = [contractDetails]
        df = pd.DataFrame(self.data)
        df.to_csv('options_test.csv')
        print(df)​

    def contractDetailsEnd(self, reqId):
        print("\ncontractDetails End\n")​

    def start(self):
        contract = Contract()
        contract.symbol = 'AAPL'
        contract.secType = 'OPT'
        contract.exchange = 'SMART'
        contract.currency = 'USD'
        #contract.primaryExchange = 'NASDAQ'
        contract.lastTradeDateOrContractMonth = '202301'
        #contract.strike = 175
        #contract.right = "C"
        #contract.multiplier = "100"
        global underlying
        underlying = contract.symbol​

        self.reqMktData(1, contract, '106', False, False, [])​

        self.reqContractDetails(1, contract)​

    def stop(self):
        self.done = True
        self.disconnect()​

    def main():
        app = TestApp()
        app.nextOrderId = 0
        app.connect('127.0.0.1', 7497, 123)
        app.data = []​

        Timer(4, app.stop).start()
        app.run()​

if __name__ == "__main__":
    main()​

This is the link to the original question: https://www.elitetrader.com/et/thre...details-to-csv-from-tws-api-in-python.344314/

And this is the link to the original answer: https://repl.it/repls/DamagedStandardDeprecatedsoftware

If anyone can figure this out, be rest assured, dinner is on me (Y)