title: python attribute error: object has no attribute
body: <p>I have a class 'UserHandler' that inherits from 'RestHandler', but for some reason it's not inheriting properly as I keep getting a 'AttributeError: 'UserHandler' object has no attribute 'sendJson'' error. I'm running python 2.7 btw.</p>
  
  <p>Code and traceback below:</p>
  
  <pre><code>import json
  import webapp2
  
  class RestHandler(webapp2.RequestHandler):
  
    def dispatch(self):
      #time.sleep(1)
      super(RestHandler, self).dispatch()
  
  
    def SendJson(self, r):
      self.response.headers['content-type'] = 'text/plain'
      self.response.write(json.dumps(r))
  
  class UserHandler(RestHandler):
    def post(self):
      r = json.loads(self.request.body)
      user = modelUser.InsertUser(r['email'], r['firebaseUid'], r['firebaseId'])
      r = modelUser.AsDict(user)
      self.sendJson(r)
  </code></pre>
  
  <p>Traceback:</p>
  
  <pre><code>Traceback (most recent call last):
    File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/runtime/wsgi.py", line 266, in Handle
      result = handler(dict(self._environ), self._StartResponse)
    File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.3/webapp2.py", line 1519, in __call__
      response = self._internal_error(e)
    File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.3/webapp2.py", line 1511, in __call__
      rv = self.handle_exception(request, response, e)
    File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.3/webapp2.py", line 1505, in __call__
      rv = self.router.dispatch(request, response)
    File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.3/webapp2.py", line 1253, in default_dispatcher
      return route.handler_adapter(request, response)
    File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.3/webapp2.py", line 1077, in __call__
      return handler.dispatch()
    File "main.py", line 25, in dispatch
      super(RestHandler, self).dispatch()
    File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.3/webapp2.py", line 547, in dispatch
      return self.handle_exception(e, self.app.debug)
    File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.3/webapp2.py", line 545, in dispatch
      return method(*args, **kwargs)
    File "main.py", line 37, in post
      self.sendJson(r)
  AttributeError: 'UserHandler' object has no attribute 'sendJson'
  </code></pre>