Re: Modifying a page and not creating a new one

Thank you Tim !

I did my homework. More or less ...


---------------------------------
import cherrypy
import os

class monSite:

#---------------index
@cherrypy.expose
def index(self, a=0, b=0, btn=None):
if btn:
# We were asked to do a computation.
r = str(int(a)+int(b)) 
s = """
            <form action="index" method="GET">
            <input type=number name='a' value= %s> +
            <input type=number name='b' value= %s>
            <input type=submit name=btn value='='> %s
            </form>
        """%(a,b,r)
else:
# initial page
s = """
            <form action="index" method="GET">
            <input type=number name='a' value=0> +
            <input type=number name='b' value=0>
            <input type=submit name=btn value='='>
            </form>
        """
return s


cherrypy.quickstart(monSite())
---------------------------------

Le mercredi 27 avril 2016 14:17:04 UTC-3, Tim Roberts a écrit :
>
> Denis LE FUR wrote:
>
> Hello, I am a new user... 
>
> Here is an example. The result appears in a new page. How to put it in the 
> index page ?
>
>
> To start, you need to change the <form> tag so that action="index".
>
> Now you need some way to tell whether you're being called to display the 
> blank page, or to display the results.  You can do that by assigning a name 
> to your "submit" button.  Then you can check that value in the code.  If it 
> is present, then you are being asked to compute.  If not, then it is an 
> initial display.  For example:
>
>     def index(self, a=0, b=0, btn=None):
>         s = ""
>         if btn:
>             # We were asked to do a computation.
>             r = int(a)+int(b)
>             s += "<p>Result of %d + %d is %d" % (a, b, r)
>         s += """
>             <form action='index' method='GET'>
>             <input type=number name='a'> +
>             <input type=number name='b'>
>             <input type=submit name=btn value='='>
>             </form>
>         """
>         return s
>
> The next exercise for you is to change the code so that the "a" and "b" 
> fields on the form show the previous values.
>
> -- 
> Tim Roberts, [email protected] <javascript:>
> Providenza & Boekelheide, Inc.
>
>

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