def submit_url(url):
    return 'https://class.coursera.org/' + url + '/assignment/submit'
Returns a list with the top 20 bid prices.
dataset/ETHPy150Open discreteoptimization/setcover/submit.py/submit_url--crossover with--dataset/ETHPy150Open gbeced/pyalgotrade/pyalgotrade/bitstamp/wsclient.py/OrderBookUpdate.getBidPrices