Wait at EOF when executing a Python-Script?

[Heiko Wolf]

Hi,

I got a Python program that executes a user-definied script (also
written in Python) with the execfile()-command.
Now another program should write its own data (e.g. Python commands)
at the end of the above mentioned script file...

Is there a way that Python waits at the end of the script and looks if
there come any new lines? It should only stop when a special keyword
comes up.
It is needed that the script is in Python, maybe there is another way
of executing it than with execfile()?

Cheers, Heiko