python连oanda的模拟交易api获取json问题第二问

Question

在第一问中已解决连接oanda的模拟交易api获得EUR_USD的即时汇率，再次感谢@prolifes的热情帮助，其程序如下：
import requests
import json
url = "https://api-fxpractice.oanda.com/v1/prices"
instruments = 'EUR_USD'
account_id = 'cawa11'
params = {'instruments':instruments,'accountId':account_id}
access_token = 'a554db3a48ac8180a6996a5547ba1663-ac5947e64456cc5842a34f4ce05e4380'
headers = {'Authorization':'Bearer '+access_token} #Bearer后有空格
r = requests.get(url,headers = headers, params=params)
print(r.json())
所得json为：
{'prices': [{'bid': 1.0926, 'time': '2017-05-03T05:45:25.737018Z', 'ask': 1.09274, 'instrument': 'EUR_USD'}]}
现在我想同时获得EUR_USD和USD_CAD的即时汇率，获得如下形式的json：
{'prices': [{'instrument': 'EUR_USD', 'ask': 1.09324, 'time': '2017-05-03T04:44:38.200174Z', 'bid': 1.09311},{'instrument': 'USD_CAD', 'ask': 1.37270, 'time': '2017-05-03T04:44:38.200174Z', 'bid': 1.37251}]}

Answer 1

问题已解决，谢谢各位关注：
import requests
import json

url = "https://api-fxpractice.oanda.com/v1/prices"
instruments = 'EUR_USD,USD_CAD'
account_id = 'cawa11'
params = {'instruments':instruments,'accountId':account_id}
access_token = 'a554db3a48ac8180a6996a5547ba1663-ac5947e64456cc5842a34f4ce05e4380'
headers = {'Connection': 'Keep-Alive','Accept-Encoding': 'gzip,deflate','Authorization':'Bearer '+access_token}
r = requests.get(url,headers = headers, params=params)
price = r.json()
print(r.json())
print(price'prices'['instrument'].replace('_','/'),':',round((price'prices'['ask']+price'prices'['bid'])/2,4),' ',price'prices'['time'])
print(price'prices'['instrument'].replace('_','/'),':',round((price'prices'['ask']+price'prices'['bid'])/2,4),' ',price'prices'['time'])

输出：
{'prices': [{'bid': 1.09171, 'ask': 1.09184, 'instrument': 'EUR_USD', 'time': '2017-05-03T06:44:19.750556Z'}, {'bid': 1.37203, 'ask': 1.37219, 'instrument': 'USD_CAD', 'time': '2017-05-03T06:44:19.738338Z'}]}
EUR/USD : 1.0918 2017-05-03T06:44:19.750556Z
USD/CAD : 1.3721 2017-05-03T06:44:19.738338Z

Answer 2

这个已经不是技术层次的问题了，你应该去了解一下他的api有没有提供这个功能，如果没有提供同时获取两个的功能，那你只能分开来取，然后再合并起来