SSL：CERTIFICATE_VERIFY_FAILED在AWS EC2上运行的python代码出错

import krakenex
import decimal
import time

def now():
    return decimal.Decimal(time.time())

k_public=krakenex.API()
eth_ret = k_public.query_public('Ticker', req = {'pair': 'XETHZEUR', 'since': now()})
print(eth_ret)
import krakenex
import decimal
import time

def