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Bonus Tutorial: Using generators to return result bodies

Instead of returning a complete result string, you can use the yield
statement to return one result part after another. This may be convenient
in situations where using a template package like CherryPy or Cheetah
would be overkill, and messy string concatenation too uncool. ;-)

import cherrypy

class GeneratorDemo:
    def header(self):
        return "<html><body><h2>Generators rule!</h2>"
    def footer(self):
        return "</body></html>"
    def index(self):
        # Let's make up a list of users for presentation purposes
        users = ['Remi', 'Carlos', 'Hendrik', 'Lorenzo Lamas']
        # Every yield line adds one part to the total result body.
        yield self.header()
        yield "<h3>List of users:</h3>"
        for user in users:
            yield "%s<br/>" % user
        yield self.footer() = True

import os.path
tutconf = os.path.join(os.path.dirname(__file__), 'tutorial.conf')

if __name__ == '__main__':
    # CherryPy always starts with app.root when trying to map request URIs
    # to objects, so we need to mount a request handler root. A request
    # to '/' will be mapped to HelloWorld().index().
    cherrypy.quickstart(GeneratorDemo(), config=tutconf)
    # This branch is for the test suite; you can ignore it.
    cherrypy.tree.mount(GeneratorDemo(), config=tutconf)