a wrapper to invoke functions using argument

[les_ander at yahoo.com]

Hi,
support I have a library of function, called mylib.py, in which
there are 2 functions 'f1' and 'f2' (1 arguments in either one);

Now I want to write a wrapper that will invoke f1 or f2 using the
command line argument. So for example, I want to write a function
"call.py" and invoke it as

python call.py f1 arg1

So this is straight forward, but I don't know how to evaluate a
function.
any help would be much appreciate it.
les