cant add the twilio-python library to a Google App Engine project

Question

hi I have been trying to add twilio-python library to a google app engine project.As recommended I followed the steps from the link below: http://twilio-python.readthedocs.org/en/latest/appengine.html .

However,I am encountering error messages about which I am a bit clueless.I am providing the log of my app engine launcher

Please have a look and let me know what am I doing wrong.

Heres the log message :

*** Running dev_appserver with the following flags:
    --skip_sdk_update_check=yes --port=12081 --admin_port=8005
Python command: /usr/bin/python2.7
Traceback (most recent call last):
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/dev_appserver.py", line 83, in <module>
    _run_file(__file__, globals())
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/dev_appserver.py", line 79, in _run_file
    execfile(_PATHS.script_file(script_name), globals_)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/devappserver2/devappserver2.py", line 1040, in <module>
    main()
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/devappserver2/devappserver2.py", line 1033, in main
    dev_server.start(options)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/devappserver2/devappserver2.py", line 758, in start
    options.config_paths, options.app_id)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/devappserver2/application_configuration.py", line 831, in __init__
    module_configuration = ModuleConfiguration(config_path, app_id)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/devappserver2/application_configuration.py", line 127, in __init__
    self._config_path)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/devappserver2/application_configuration.py", line 424, in _parse_configuration
    config, files = appinfo_includes.ParseAndReturnIncludePaths(f)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/api/appinfo_includes.py", line 82, in ParseAndReturnIncludePaths
    appyaml = appinfo.LoadSingleAppInfo(appinfo_file)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/api/appinfo.py", line 2214, in LoadSingleAppInfo
    raise appinfo_errors.EmptyConfigurationFile()
google.appengine.api.appinfo_errors.EmptyConfigurationFile

Answer 1

App Engine tried to load an empty configuration file, your app.yaml file. Hence it's throwing an EmptyConfigurationFile error. App engine needs to be informed about some basic configuration parameters to start serving your app, however basic it is.

The following is a basic app.yaml config file structured for your example:

application: twilio-demo
version: 1
runtime: python27
api_version: 1
threadsafe: true

handlers:
- url: .*
  script: helloworld.app

You can read more on Configuring with app.yaml