The arena view accepts the request object and then instantiates an ArenaForm object to gather the data needed to respond to the request. A query of the Arenas model objects and its values_list method creates a Python list that contains tuples with the ID and name of every arena. The request method (either GET or POST) is used in a conditional to determine the appropriate response.
If a GET request is received (that is, the web page is first opened), a random arena object is generated and passed to the template, which shows the arena on the included map. To get a random arena, we use the list of arena names and IDs (values). Once the list is generated, a list comprehension is used to generate a new list containing arena names. ...
