def get_index_list(index_symbol = 'sh000068'):
stocks2 = []
stocks = ak.index_stock_hist(index_symbol).stock_code
for stock in stocks[:]:
if int(stock) < 100000:
stock = 'sz' + stock
else:
stock = 'sh' + stock
stocks2.append(stock)
return stocks2
stock_pool = get_index_list()