To use these examples you first have to initialize them. That is quite easy.
On the command line switch to this directory and then enter:

$ pyxer init
$ pyxer install pygments

After that you may start the server process like this:

$ dev_appserver.py .

The open your browser and surf to http://localhost:8080 or http://127.0.0.1:8080

Read the documentation for more informations!
  