Now that we’ve designated a wildcard for the URL, we need a way of passing that
wildcard data to the view function, so that we can use a single view function
for any arbitrary hour offset. We do this by placing parentheses around the
data in the URLpattern that we want to save.
we’re using parentheses to capture data from the matched text.
The pdb prompt doubles up as a full Python interactive shell, so you can not only access variables but you can modify them, call functions and generally mess around with the internals of your application as much as you like, while it’s running