2

我正在尝试解析来自下一个谷歌查询的 json 结果:

http://www.google.com/ig/calculator?hl=en&q=1USD=?MXN

结果是这样的:

{lhs: "1 U.S. dollar",rhs: "13.3317335 Mexican pesos",error: "",icc: true}

所以我只是想用这个解码:

import json, urllib2

j=urllib2.urlopen("http://www.google.com/ig/calculator?hl=en&q=1USD=?MXN")
print json.load(j)

但我有这个错误(追溯):

Traceback (most recent call last):
  File "/home/rafael/gitSources/PythonConcept/Monpy/negApi.py", line 4, in <module>
    print json.load(j)
  File "/usr/lib/python2.7/json/__init__.py", line 278, in load
    **kw)
  File "/usr/lib/python2.7/json/__init__.py", line 326, in loads
    return _default_decoder.decode(s)
  File "/usr/lib/python2.7/json/decoder.py", line 366, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/usr/lib/python2.7/json/decoder.py", line 382, in raw_decode
    obj, end = self.scan_once(s, idx)
ValueError: Expecting property name: line 1 column 1 (char 1)
[Finished in 0.6s with exit code 1]

我不知道我做错了什么,我只是阅读了很多教程:/

谢谢 :)!

4

3 回答 3

2

这不是 JSON,但您仍然可以自己解析它 - 如下所示:

import ast

resp = '{lhs: "1 U.S. dollar",rhs: "13.3317335 Mexican pesos",error: "",icc: true}'

d = {}
for pair in resp[1:-1].split(','):
    (k,v) = pair.split(':')
    v = v.strip()
    if v == "true":
        v = "True"
    try:
        v = ast.literal_eval(v)
    except:
        print "Couldn't eval " + v
    d[k] = v

print d

您还可以将格式修复为 json,然后像这样使用 json 解析器:

import json

resp = '{lhs: "1 U.S. dollar",rhs: "13.3317335 Mexican pesos",error: "",icc: true}'

s = "{"    
for pair in resp[1:-1].split(','):
    (k,v) = pair.split(':')
    s += '"%s" : %s,' % (k,v)
s = s[:-1] + "}"

print json.loads(s)
于 2012-07-11T08:13:32.097 回答
1

您可以使用rate-exchange.appspot.com,它使用 Google API 但返回有效的 json:

http://rate-exchange.appspot.com/currency?from=USD&to=MXN&q=1
{"to": "MXN", "rate": 12.7523369, "from": "USD", "v": 12.7523369}

以下是如何使用它requests

>>> import requests
>>> r = requests.get('http://rate-exchange.appspot.com/currency?from=USD&to=MXN&q=1')
>>> r.json['v']
12.7523369
于 2013-03-05T05:12:09.843 回答
0

这是你应该做的:

重新进口

s = '{lhs: "1 U.S. dollar",rhs: "13.3317335 Mexican pesos",error: "",icc: true}'
only_numbers=re.sub(r'[^0-9,.]+', '', s)
m = re.match(r"(\d+..),(\d+.\d+),,", only_numbers)
currency=m.group(2)

输出:13.3317335

于 2013-03-05T04:54:01.860 回答