Source code for cherrypy.tutorial.tut08_generators_and_yield

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 os.path

import cherrypy

[docs]class GeneratorDemo:
[docs] def header(self): return '<html><body><h2>Generators rule!</h2>'
[docs] def footer(self): return '</body></html>'
[docs] @cherrypy.expose 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()
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)