LPTHW - Exercise 51

In this exercise, we learn how to deal with form input and a bit about testing web apps.

The first thing I did was to change app.py and refactor it to handle web input. We will handle simple input as GET input parameters to start with.

Here is the new app.py file:



Now if you notice, in this file we use the line

form = web.input(name="Nobody")

to handle the input. If the input contains a 'name' parameter, then we will use it, else it will default to "Nobody", since we have given a default value as an argument to the function call.

Getting the values as url parameters is not a good idea:

This is a good beginning, but we should really be getting the values in a form and not as command line parameters. For this we will need to add some HTML and a method in the Index class to handle POST data (since this is the default method for sending form data).

I made a few changes to app.py, index.html, and added a new file hello_form.html All the code is embedded below:



Don't repeat boilerplate code:

It's very good that we can now handle form data. However, the observant programmer must have noticed that both index.html, and hello_form.html have common boilerplate code. It would be good if we can remove the repetition. Well, we can, if we use templates.


All the code which uses templates is embedded below: