[Tutor] Input from CGI ?

Thu Nov 4 19:04:01 CET 2004

On Wed, 3 Nov 2004 13:34:46 -0800 (PST), Danny Yoo
<dyoo at hkn.eecs.berkeley.edu> wrote:
> 
> 
> On Wed, 3 Nov 2004, Mark Kels wrote:
> 
> > How can I get input (string) from the user in CGI ?
> 
> 
> Hi Mark,
> 
> There are examples of doing this in the Standard Library documentation.
> Here's a link to the documentation on the 'cgi' module:
> 
>     http://www.python.org/doc/lib/module-cgi.html
> 
> The idea is to use the cgi module to grab form values.  There are several
> methods we can use, but the easiest one is probably
> FieldStorage.getfirst().
> 
> Here's a quick example CGI program that takes in a number and prints out
> its square:
> 
> ###
> #!/usr/bin/python
> 
> """A small program to demonstrate simple CGIish stuff."""
> 
> import cgi
> import cgitb; cgitb.enable()
> 
> def main():
>     form = cgi.FieldStorage()
>     if form.getfirst("number"):
>         doComputationAndPrintResult(form)
>     else:
>         printStartPage()
> 
> def printStartPage():
>     printHtmlHeader()
>     print """
>     <html><body>
>     <form><input name="number" type="text"></form>
>     </body></html>
>     """
> 
> def doComputationAndPrintResult(form):
>     computedResult = square(int(form.getfirst("number")))
> 
>     printHtmlHeader()
>     print """
>     <html><body>
>     %s
>     </body></html>
>     """ % computedResult
> 
> def printHtmlHeader():
>     """Prints out the standard HTML header line."""
>     print "Content-type: text/html\n\n"
> 
> def square(x):
>     """Returns the square of x."""
>     return x * x
> 
> if __name__ == '__main__':
>     main()
> ###
> 
> You might also like to browse through the Web Programming topic guide
> here:
> 
>     http://www.python.org/topics/web/
> 
> Good luck to you!
> 
> 

Thank you!!
It was very helpful.

But how do I get more than one line ?
And how can I make radio buttons and get the input wuth them ?
And what this thing does ( I see it in almost every code example) :
if __name__ == '__main__':
   main()
?

Thanks!!