function inclusion problem

[vlyamtsev at gmail.com]

I defined function Fatalln in "mydef.py" and it works fine if i call it from "mydef.py", but when i try to call it from "test.py" in the same folder:
import mydef
...
Fatalln "my test"
i have NameError: name 'Fatalln' is not defined
I also tried include('mydef.py') with the same result...
What is the right syntax?
Thanks