python之在 Python 中使用 FRED API 时出现问题——无法加载模块

我正在尝试将此 API 用于美联储经济数据 (FRED): https://github.com/zachwill/fred

我安装了文档中提到的三个必需模块。我收到此错误:

import fred 
 
Traceback (most recent call last): 
  File "<pyshell#0>", line 1, in <module> 
    import fred 
  File "build\bdist.win32\egg\fred\__init__.py", line 1, in <module> 
    # Dummy file to make this a package. 
  File "build\bdist.win32\egg\fred\fred.py", line 21, in <module> 
ImportError: cannot import name xml2dict 

然后我安装了 xml2dict 并再次安装了 fred。当我现在先导入 xml2dict 然后再导入 fred 时，我得到了完全相同的错误。

我很难学习如何在 Python 中安装模块，但我认为我终于弄明白了。我似乎无法在这里找到我做错了什么，需要一些帮助。谢谢!

对于 Zach:这是我目前遇到的问题:

Traceback (most recent call last): 
  File "<pyshell#3>", line 1, in <module> 
    fred.series('GNPCA') 
  File "build\bdist.win32\egg\fred\api.py", line 90, in series 
    return Fred().series(path, **kwargs) 
  File "build\bdist.win32\egg\fred\core.py", line 100, in series 
    return self.get('series', path, **kwargs) 
  File "build\bdist.win32\egg\fred\core.py", line 36, in get 
    request = requests.get(url, params=params) 
  File "C:\Python26\lib\site-packages\requests-0.13.2-py2.6.egg\requests\api.py", line 54, in get 
    return request('get', url, **kwargs) 
  File "C:\Python26\lib\site-packages\requests-0.13.2-py2.6.egg\requests\safe_mode.py", line 37,     in wrapped 
    return function(method, url, **kwargs) 
  File "C:\Python26\lib\site-packages\requests-0.13.2-py2.6.egg\requests\api.py", line 42, in     request 
return s.request(method=method, url=url, **kwargs) 
  File "C:\Python26\lib\site-packages\requests-0.13.2-py2.6.egg\requests\sessions.py", line 230, in request 
    r.send(prefetch=prefetch) 
  File "C:\Python26\lib\site-packages\requests-0.13.2-py2.6.egg\requests\models.py", line 601, in send 
    raise ConnectionError(e) 
ConnectionError: HTTPConnectionPool(host='api.stlouisfed.org', port=80): Max retries exceeded with     url: /fred/series?series_id=GNPCA&api_key= 

请您参考如下方法:

我是 fred 包的开发者。这完全是我的错——我的 setup.py 文件配置不正确，我只是推送了一个应该解决这个问题的更新。抱歉造成混淆!