在json（Python）中解析代码

Question

我有以下代码：

from googlefinance import getQuotes
import simplejson as json

print (json.dumps(getQuotes('FRA:BMW'), indent=2))
b=(json.dumps(getQuotes('FRA:BMW'), indent=2))
print(type(b))
a = json.loads((json.dumps(getQuotes('FRA:BMW'), indent=2)))
print(type(a))

---

这就是我得到的：

[
  {
    "LastTradePrice": "73.39",
    "LastTradeWithCurrency": "€73.39",
    "LastTradeDateTime": "2016-05-13T19:57:30Z",
    "LastTradeDateTimeLong": "May 13, 7:57PM GMT+2",
    "ID": "10224532",
    "Index": "FRA",
    "StockSymbol": "BMW",
    "LastTradeTime": "7:57PM GMT+2"
  }
]
<class 'str'>
<class 'list'>
[{'LastTradePrice': '73.39', 'LastTradeWithCurrency': '&#8364;73.39', 'LastTradeDateTimeLong': 'May 13, 7:57PM GMT+2', 'LastTradeDateTime': '2016-05-13T19:57:30Z', 'ID': '10224532', 'Index': 'FRA', 'StockSymbol': 'BMW', 'LastTradeTime': '7:57PM GMT+2'}]
test
Traceback (most recent call last):
  line 11, in <module>
    print((a)["Index"])

TypeError: list indices must be integers or slices, not str

---

如您所见，我无法打印“索引”值（在案例：FRA)（脚本的最后一行代码）不知道该怎么做。你知道吗

Answer 1

您不需要json模块来读取这些数据。它已经是Pythondictionary。错误是说您必须索引getQuotes返回的列表。因为只有一个元素，所以可以使用[0]

>>> from googlefinance import getQuotes
>>> fra_bmw = getQuotes('FRA:BMW')
>>> fra_bmw[0]["Index"]
u'FRA'