Ccxt: Fetch_ohlcv (simbol, '1m') dari batas waktu okex

MASALAH ：
Saya menjalankan sekitar 30 menit kemudian, masalah waktu habis, adalah pertanyaan pertukaran, atau masalah ccxt, bagaimana mengatasinya.

• OS: win10
• Versi Bahasa Pemrograman: python 3.6
• Versi CCXT: ccxt-1.11.137
• Pertukaran: okex
• Metode: exchange.fetch_ohlcv (self.symbol, '1m')

KODE:

 def get_close_prices(self):
        close_prices = []
        bar_data = np.array(self.exchange.fetch_ohlcv(symbol, '1m'))
        for element in bar_data:
            close_prices.append(float(element[4]))
        return close_prices

if __name__ == '__main__':
while true:
        close_prices = self.get_close_prices()
        time.sleep(1 * 60)

KESALAHAN:

File "E: /work/test/test.py", baris 44, di handle_bar
close_prices = np.array (self.get_close_prices ())
File "E: /work/test/test.py", baris 24, di get_close_prices
bar_data = np.array (self.exchange.fetch_ohlcv (self.symbol, '1m'))
File "E: \ sorfware \ anaconda3.5 \ lib \ site-packages \ ccxt \ okcoinusd.py", baris 348, di fetch_ohlcv
response = getattr (self, method) (self.extend (request, params))
File "E: \ sorfware \ anaconda3.5 \ lib \ site-packages \ ccxt \ base \ exchange.py", baris 298, dalam permintaan
return self.fetch2 (path, api, method, params, headers, body)
File "E: \ sorfware \ anaconda3.5 \ lib \ site-packages \ ccxt \ base \ exchange.py", baris 295, di fetch2
return self.fetch (request ['url'], request ['method'], request ['headers'], request ['body'])
File "E: \ sorfware \ anaconda3.5 \ lib \ site-packages \ ccxt \ base \ exchange.py", baris 359, di ambil
self.raise_error (RequestTimeout, metode, url, e)
File "E: \ sorfware \ anaconda3.5 \ lib \ site-packages \ ccxt \ base \ exchange.py", baris 280, di raise_error
naikkan exception_type (keluaran)
ccxt.base.errors.RequestTimeout: okex DAPATKAN https://www.okex.com/api/v1/kline.do?symbol=bch_btc&type=1min&since=1521547087487 HTTPSConnectionPool (host = 'www.okex.com', port = 443 ): Waktu pembacaan habis. (baca waktu tunggu = 10)