execute a function after each source code line ?

[stef]

hello,

doing a simulation of another language (JAL),
I translate the other language into Python code,
then I execute this converted Python code.

Now I need todo some checks and give visual feedback to the user,
each time a line of code is executed.

One way of realizing this, is to add a function call at each source code 
line under investigation.

Are there any other (simple) ways of achieving this ?
(btw the whole program is running as an graphical (wxPython) application)

thanks,
Stef Mientki