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App Engine supports any Python application with a CGI interface. A web application framework can simplify development by taking care of the details of the interface, letting you focus development effort on your applications features. App Engine includes a simple web application framework called webapp.
webapp is a WSGI-compatible framework. You can use webapp or any other WSGI framework with App Engine using a CGI adaptor, such as one provided by the Python standard library.
Here is a simple webapp application that uses a CGI adaptor with App Engine:
from google.appengine.ext import webapp from google.appengine.ext.webapp.util import run_wsgi_app class MainPage(webapp.RequestHandler): def get(self): self.response.headers['Content-Type'] = 'text/plain' self.response.out.write('Hello, webapp World!') application = webapp.WSGIApplication([('/', MainPage)], debug=True) def main(): run_wsgi_app(application) if __name__ == "__main__": main()