how to iterate over sequence and non-sequence ?

[Steven D'Aprano]

On Fri, 19 Oct 2007 18:38:06 +0200, stef mientki wrote:

> I don't have pointers, I've just names (at least I think). Let me
> explain a little bit more,
> I want to simulate / debug a user program, the user program might look
> like this:
> 
>    x = 5
>    for i in xrange(10):
>        x = x + 1


I thought you were writing a JAL interpreter:

http://en.wikipedia.org/wiki/JAL_(compiler)

but the code above is Python.



> So now I want to follow the changes in "x" and "i", therefor in the
> background I change the user program a little bit, like this
> 
> def user_program():
>    x = 5    ; _debug(2)
>    global x,i
>    _debug (3)
>    for i in xrange(10):
>        _debug (3)
>        x = x + 1    ; _debug (4)
> 
> And this modified user program is now called by the main program. Now in
> the _debug procedure I can set breakpoints and watch x and i. 

Python already has a debugger. Try this:

import pdb
help(pdb)



-- 
Steven.