我不能用python从JSON获取数据

Question

我似乎无法从一个使用JSON的网站API中获得上一次记录的价格。我试着找出错误，但我觉得没问题。代码是用python编写的 这是我必须获得的Url：https://api.independentreserve.com/Public/GetMarketSummary?primaryCurrencyCode=xbt&secondaryCurrencyCode=aud

Python 3.7版

import requests


URL = "https://api.independentreserve.com/Public/GetMarketSummary?"

CurrencyCode = "xbt"
SecondaryCode = "aud"
PARAMS = {'primaryCurrencyCode': CurrencyCode, '&secondaryCurrencyCode': SecondaryCode}
r = requests.get(url=URL, params=PARAMS)

data = r.json()


lastprice = data['LastPrice']


print("Last Price:%s" % lastprice)

Answer 1

这是固定密码

import requests


URL = "https://api.independentreserve.com/Public/GetMarketSummary?"

CurrencyCode = "xbt"
SecondaryCode = "aud"
PARAMS = {'primaryCurrencyCode': CurrencyCode, 'SecondaryCurrencyCode': SecondaryCode}
r = requests.get(url=URL, params=PARAMS)

data = r.json()


lastprice = data['LastPrice']


print("Last Price:%s" % lastprice)

问题出在PARAMS词典中。您需要将"&secondaryCurrencyCode"更改为"SecondaryCurrencyCode"

如果您打印了datadict，您将看到：

{'Message': 'Secondary Currency Code is required'}

Answer 2

API要求的是secondaryCurrencyCode，而不是&secondaryCurrencyCode

您不需要&；使用参数时签名

Answer 3

在"&secondaryCurrencyCode"中删除&将解决此问题

固定代码如下：

import requests

URL = "https://api.independentreserve.com/Public/GetMarketSummary?"

CurrencyCode = "xbt"
SecondaryCode = "aud"
PARAMS = {'primaryCurrencyCode': CurrencyCode, 'secondaryCurrencyCode': SecondaryCode}
r = requests.get(url=URL, params=PARAMS)

data = r.json()


lastprice = data['LastPrice']

print("Last Price:%s" % lastprice)