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for i in range(3):
    try:
        from io import StringIO
        header_data = {
             'X-Kite-Version': '3',
            'Authorization': 'token '+str(kite_rc)+":"+str(access_token_rc),
            'Content-Type': 'application/json'
        }
        r = requests.get('https://api.kite.trade/instruments',
                           headers=header_data)
        data = StringIO(r.text)
        instruments_df = pd.read_csv(data)
        break
    except Exception as e:
        print("Error",e)
