title: simplejson in Python throws value error
body: <p>I've got a JSON string that I'm posting to my Python script. This is an example string:</p>
  
  <pre><code>{"uid":"1111111","method":"check_user"}
  </code></pre>
  
  <p>In my Python code I simply call <code>simplejson.loads( str )</code> where <code>str</code> is the JSON string from the request. The JSON string seems fine as when I print it at request time it's intact. However I get a ValueError:</p>
  
  <pre><code>Extra data: line 1 column 41 - line 1 column 48 (char 41 - 48)
  Traceback (most recent call last):   File
  "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/ext/webapp/_webapp25.py",
  line 703, in __call__
      handler.post(*groups)   File "/Users/.../app/controller/api_controller.py", line 25, in post
      req = simplejson.loads( req )   File
  "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/django_0_96/django/utils/simplejson/__init__.py",
  line 232, in loads
      return cls(encoding=encoding, **kw).decode(s)   File
  "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/django_0_96/django/utils/simplejson/decoder.py",
  line 254, in decode
      raise ValueError(errmsg("Extra data", s, end, len(s)))
  </code></pre>
  
  <p>Any ideas what it may be? I've tried removing new lines, tabs and slashes from the string, even decoding it using <code>.decode('string_escape')</code></p>