Google app engine running error -

when trying run 1 of application on google app engine keep on getting yell icon means error. how can fix ,so can run application.

the error 1 left end side of hello-udacity

here link of picture of error: https://plus.google.com/u/1/115545843446144625696/posts/aoryon2r2sd?pid=6168940381509733874&oid=115545843446144625696

in main.py

import webapp2  class mainhandler(webapp2.requesthandler):     def get(self):         self.response.write('hello udacity!')  app = webapp2.wsgiapplication([('/', mainhandler)],                                  debug=true) 

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in app.yaml

application: hello-udacity  version: 1  runtime: python27  api_version: 1  threadsafe: yes   handlers:  - url: /favicon\.ico    static_files: favicon.ico    upload: favicon\.ico   - url: .*    script: main.app   libraries:  - name: webapp2  version: "2.5.2" 

the app.yaml file uses yaml syntax , app.yaml should comply those. following clearer configuration

application: hello-udacity version: 1 runtime: python27 api_version: 1 threadsafe: yes  handlers: - url: /favicon\.ico   static_files: favicon.ico   upload: favicon\.ico  - url: .*   script: main.app  libraries: - name: webapp2   version: "2.5.2" 

for more on see about app.yaml in developer docs