title: Json array adds an u character python
body: <p>I'm loading an array from a bucket content in S3, but when I load the array  and printed the string using the following code:</p>
  <pre><code>for obj_array in bucket_array.objects.all():
    json_array = obj_array.get()['Body'].read()
  </code></pre>
  <p>it has the <code>u</code> character at the beginning of each value like follows:</p>
  <h1>current array:</h1>
  <pre><code>{
    u'values': [{
      u'sensor': u'2',
      u'temperature': u'24.5',
      u'unit': u 'celsius',
      u'datetime': u'23-02-2017 21:03:50'
    }, {
      u'sensor': u'2',
      u'temperature': u'24.5',
      u'unit': u'celsius',
      u'datetime': u'24-02-2017 4:00:36'
    }]
  }
  </code></pre>
  <p>So, when I tried to do <code>array_data = json.loads(json_array)</code> it throws me the following error:</p>
  <pre><code>Expecting property name: line 1 column 2 (char 1): ValueError
  Any ideas how to solve this?
  </code></pre>