title: crossbar.io container configuration, invalid attribute value 'component.python' for attribute 'type' in worker item
body: <p>I try to configure a container worker by this config file:<div class="snippet" data-lang="js" data-hide="false">
  <div class="snippet-code">
  <pre class="snippet-code-html lang-html prettyprint-override"><code>{
     "controller": {
     },  
     "workers": [
        {   
           "type": "router",
           "options": {
              "pythonpath": [".."]
           },  
           "realms": [
              {   
                 "name": "realm1",
                 "roles": [
                    {   
                       "name": "anonymous",
                       "permissions": [
                          {   
                             "uri": "*",
                             "publish": true,
                             "subscribe": true,
                             "call": true,
                             "register": true
                          }   
                       ]   
                    }   
                 ]   
              }   
           ],  
           "transports": [
              {   
                 "type": "web",
                 "endpoint": {
                    "type": "tcp",
                    "port": 8080
                 },  
                 "paths": {
                    "/": {
                       "type": "static",
                       "directory": ".."
                    },  
                    "ws": {
                       "type": "websocket"
                    }   
                 }   
              }   
           ]   
        },  
        {   
           "type": "component.python",
           "class": "write_file.write_file.WriteFile",
           "router": {
               "type": "websocket",
               "endpoint": {
                   "type": "tcp",
                   "host": "localhost",
                   "port": 8080
               },  
               "url": "ws://localhost:8080/ws",
               "realm": "realm1"
           },  
           "options": {
               "pythonpath": [".."]
           }
        }
     ]
  }</code></pre>
  </div>
  </div>
  </p>
  
  <p>end I get:</p>
  
  <p>"Error: invalid attribute value 'component.python' for attribute 'type' in worker item"</p>
  
  <p>According to <a href="http://crossbar.io/docs/Container-Configuration" rel="nofollow">this</a>, there should be a 'component.python' type of worker.</p>
  
  <p>What is wrong with the config?</p>
  
  <p>I'll appreciate any help.</p>