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| From | Ben Finney <ben@benfinney.id.au> |
| Subject | Re: Two more newbie questions |
| Date | Fri, 18 Jul 2014 19:45:55 +1000 |
| References | <CAHXoDSATbzBpibLv6xTnZdaOBJrhKH2fVWBQ6w547km_9kTBFg@mail.gmail.com> <85tx6fqdmc.fsf@benfinney.id.au> <1405674482.7795.9.camel@mobileDragon> |
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Shieldfire <shieldfire@gmail.com> writes:
> On fre, 2014-07-18 at 18:23 +1000, Ben Finney wrote:
> > So, if by “slap a GUI onto” you mean something that is a no-frills
> > plain-HTML form, with essentially no assistance for the user and no
> > error handling, this will be a lot simpler to implement than
> > something easier for the human to use.
>
> Pretty much this. Because anyone using the tool would understand what to
> enter. There are things like opponent, result, tournament and rating
> without which there wouldn't be a need to use the tool in the first
> place.
In that case, design the UI as an HTML form; this is a task that
requires no knowledge of Python, since you're just writing according to
basic HTML.
<html>
<head><title>The Amazing Gezundheiticator</title>
</head>
<body>
<h1>The Amazing Gezundheiticator</h1>
<p>Fill out the inputs to the program and submit the form.</p>
<form name="app-input" action="/uri/to/backend-program">
<p>
<label for="foo">Foo:</label>
<input name="foo" type="number" maxwidth="10" />
</p>
<p>
<label for="bar">Bar:</label>
<input name="bar" type="text" maxwith="25" />
</p>
<input type="submit" value="Gezundheiticate" />
</form>
</body></html>
That's the input part of the UI; the other part is a response page with
whatever result (error output, requested output, whatever) your back-end
program will create. You'll need to write HTML pages for all the
different kinds of responses your program can produce.
It submits the input as an HTTP request to ‘/uri/to/backend-program’.
The web server's job is to turn that URI into a call to your Python
program; and your program then needs to extract from the HTTP request
the values to process, and generate an HTTP response.
So you have these additional, related tasks for your UI:
* Accepting HTTP requests and routing them to your back-end program.
You'll need to run a web server of some kind, and configure a map of
routes from incoming URIs to the corresponding program to handle them
<URL:https://wiki.python.org/moin/WebServers>.
* Generating HTML for all the different kinds of response (requested
output, error output, requests to re-try, etc.) from the back-end
program. This is the job of an HTML templating library; see
<URL:https://wiki.python.org/moin/Templating> for details.
Start simple, with a very bare HTML template populated using the
standard library's ‘string.Template’ class
<URL:https://docs.python.org/3/library/string.html#template-strings>.
* Serving the resulting generated page as an HTTP response. This needs
to be handled in a standard way to conform to networking and
web-browser expectations. The library handling your interface to the
web server is the best candidate for this task.
If you want a small framework to handle these while letting you keep
your configuration work reasonably simple, I recommend Bottle
<URL:http://bottlepy.org/>.
Good hunting!
--
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Ben Finney
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Re: Two more newbie questions Ben Finney <ben@benfinney.id.au> - 2014-07-18 19:45 +1000
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