[Edu-sig] Simplest webapps

Fri Mar 30 14:49:02 EDT 2018

http://anvil.works/ is a pretty interesting approach to Python web
applications.

On Fri, Mar 30, 2018 at 2:05 PM, kirby urner <kirby.urner at gmail.com> wrote:

>
> Hi Aivar --
>
> I think it's a fine idea to write simple Python scripts that write HTML
> files, which you may then pull up in the browser.
>
> There's no need to put a server behind static web pages.  So, for example,
> I'll have my students write a page of bookmarks:
>
> # -*- coding: utf-8 -*-
> """
> Created on Wed Nov  4 18:02:30 2015
>
> @author: Kirby Urner
> """
>
> # tuple of tuples
> bookmarks = (
>     ("Anaconda.org", "http://anaconda.org"),
>     ("Python.org", "http://python.org"),
>     ("Python Docs", "https://docs.python.org/3/"),
>     ("Spaghetti Code", "http://c2.com/cgi/wiki?SpaghettiCode"),
>     ("Structured Programming", "http://c2.com/cgi/wiki?
> StructuredProgramming"),
>     ("Map of Languages", "http://archive.oreilly.com/pub/a/oreilly//news/
> languageposter_0504.html"),
>     ("XKCD", "http://xkcd.com"),
>     )
>
> page = '''\
> <!DOCTYPE HTML>
> {}
> '''
>
> html = """\
> <HTML>
> <HEAD>
> <TITLE>Bookmarks for Python</TITLE>
> </HEAD>
> <BODY>
> <H3>Bookmarks</H3>
> <BR />
> <UL>
> {}
> </UL>
> </BODY>
> </HTML>
> """.lower()
>
> the_body = ""
> for place, url in bookmarks:
>     the_body += "<li><a href='{}'>{}</a></li>\n".format(url, place)
>
> webpage = open("links.html", "w")
> print(page.format(html.format(the_body)), file=webpage)
> webpage.close()
>
> All you need add to your example is using print() to save to a file, so
> the browser has something to open.
>
> I would not call this a "web app" yet it's instructive in showing how
> Python can write HTML files.
>
> Kirby
>
>
>
> On Wed, Mar 28, 2018 at 12:18 AM, Aivar Annamaa <aivar.annamaa at ut.ee>
> wrote:
>
>> Hi!
>> Let's say my students are able to write programs like this:
>>
>> name = input("name")
>>
>> if name == "Pete":
>>     greeting = "Hi"
>> else:
>>     greeting = "Hello!"
>>
>> print(f"""
>> <html>
>> <body>
>> {greeting} {name}!
>> </body>
>> </html>
>> """)
>>
>> I'd like to allow them start writing web-apps without introducing
>> functions first (most web-frameworks require functions).
>>
>> It occurred to me that it's not hard to create a wrapper, which presents
>> this code as a web-app (input would be patched to look up GET or POST
>> parameters with given name).
>>
>> This approach would allow simple debugging of the code on local machine
>> and no extra libraries are required in this phase.
>>
>> Any opinions on this? Has this been tried before?
>>
>> best regards,
>> Aivar
>>
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>
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