[Python-talk] Help, it's not COBOL

[Christopher Schmidt]

On Wed, Jan 28, 2009 at 12:03:09PM -0500, Mark Ordung wrote:
> Could someone tell a python (and any modern programming language) newbie
> what is going on in the below fragment - the end of a short CGI program?
> What is the name for the %(redirect) construct  inside the string and and
> why do you need globals()  to supply it's value (if that's what's going on?)
> since redirect appears to be a local variable?
> 
> # redirect, or return a response if not redirecting
> redirect = form.getvalue('redirect', None)
> 
> print "Content-type: text/html"
> 
> if redirect:
>     print "Location: %(redirect)s\n" % globals()

I don't know why this is being done. I would do, instead: 

     print "Location: %s\n" % redirect

What this is doing is taking redirect from globals and plopping it into
the string by using 'redirect' as a key in globals.

>>> c = {'a':'b'}
>>> print '%(a)s' % c
b

But I definitely don't see that as being neccesary....

> else:
>     print
>     print "Thanks for your feedback!"
> 
> -- 
> "Doubt is not a pleasant condition, but certainty is absurd." – Voltaire

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-- 
Christopher Schmidt
Web Developer