title: Reading protobuf in python. Extracting data
body: <p>I am trying to work with data from spinn3r. The data is returned as a protobuf. In python, when I print the protobuf object, I get this:</p>
  
  <pre><code>print data
  source {
    link {
      href: ""
      resource: ""
    }
    canonical_link {
      href: "http://twitter.com/_PattiShaw/statuses/28167079857225728"
      resource: ""
    }
    title: ""
    hashcode: ""
    lang {
      code: "en"
      probability: -1.0
    }
    generator: ""
    description: ""
    last_posted: ""
    last_published: ""
    date_found: ""
    publisher_type: "MICROBLOG"
  }
  feed {
    link {
      href: ""
      resource: ""
    }
    canonical_link {
      href: ""
      resource: ""
    }
    title: ""
    hashcode: ""
    lang {
      code: "en"
      probability: -1.0
    }
    generator: ""
    description: ""
    last_posted: ""
    last_published: ""
    date_found: ""
    etag: ""
    channel_link {
      href: ""
      resource: ""
    }
  }
  feed_entry {
    link {
      href: "http://twitter.com/_PattiShaw/statuses/28167079857225728"
      resource: "http://twitter.com/_PattiShaw/statuses/28167079857225728"
    }
    canonical_link {
      href: "http://twitter.com/_PattiShaw/statuses/28167079857225728"
      resource: "http://twitter.com/_PattiShaw/statuses/28167079857225728"
    }
    title: "The value of a man resides in what he gives and not in what he is capable of receiving. ~ Albert Einstein"
    hashcode: "8WhKLK9Lyng"
    lang {
      code: "en"
      probability: -1.0
    }
    author {
      name: "_PattiShaw (Patti Shaw)"
      email: ""
      link {
        href: "http://twitter.com/_PattiShaw"
      }
    }
    spam_probability: 0.0
    last_published: "2011-01-20T19:08:49Z"
    date_found: "2011-01-20T19:08:49Z"
    identifier: 1295550574016007548
    content {
      mime_type: "text/html"
      data: "x\332M\214\301\r\2000\014\304V\271\t`\201\n\211\007\033\260@B\003\215TR\324\226\362cv\020/\276\266\3459\010\032\305S\220V\020v2d)\352\245@\rW\240\212\267\330\264\275\300\361@\346]\317\003,\325\277\327\202\205\016\342\370m\262,\242Mm\353pc\214,\271bR+U\324\036\200\236&amp;\363"
      encoding: "zlib"
    }
  }
  permalink_entry {
    link {
      href: "http://twitter.com/_PattiShaw/statuses/28167079857225728"
      resource: "http://twitter.com/_PattiShaw/statuses/28167079857225728"
    }
    canonical_link {
      href: "http://twitter.com/_PattiShaw/statuses/28167079857225728"
      resource: "http://twitter.com/_PattiShaw/statuses/28167079857225728"
    }
    title: "The value of a man resides in what he gives and not in what he is capable of receiving. ~ Albert Einstein"
    hashcode: "8WhKLK9Lyng"
    lang {
      code: "en"
      probability: -1.0
    }
    author {
      name: "_PattiShaw (Patti Shaw)"
      email: ""
      link {
        href: "http://twitter.com/_PattiShaw"
      }
    }
    spam_probability: 0.0
    last_published: "2011-01-20T19:08:49Z"
    date_found: "2011-01-20T19:09:34Z"
    identifier: 1295550574016007548
    content {
      mime_type: "text/html"
      data: ""
    }
    content_extract {
      mime_type: "text/html"
      data: ""
    }
    generator: ""
  }
  </code></pre>
  
  <p>I want to extract the "author name" from the "feed_entry" object. I tried this:</p>
  
  <pre><code>print data.feed_entry.author.name
  </code></pre>
  
  <p>I get the error:</p>
  
  <pre><code>AttributeError: 'RepeatedCompositeFieldContainer' object has no attribute 'name'
  </code></pre>
  
  <p>I tried just printing the author object to see what happens. This is what I got:</p>
  
  <pre><code>print u.feed_entry.author
  [&lt;spinn3rApi_pb2.Author object at 0x362e6d0&gt;]
  </code></pre>
  
  <p>How do I extract this author name?</p>