Python Feature Request: Explicit variable declarations

[samjnaa at gmail.com]

Hello. Please tell me whether this feature request is sane (and not
done before) for python so it can be posted to the python-dev mailing
list. I should say first that I am not a professional programmer with
too much technical knowledge.

I would like to have something like the "option explicit" statement in
Visual Basic which turns on C-like checking for declaration of
variables. This is highly helpful for people who are coming from C/C+
+, for people who are learning programming using Python, and even
professionals, since this helps prevent typo errors like:

sunlognitude = sunlongitude + 180.0

where the user has inadvertantly typed "g" before "n" and will later
wonder why his application is not working as expected.