Fork() and exec() dont work

[blah@blah.blah]

i m using Windows XP, and by tomorrow i will have have fedora core 
installed too. the problem is, when i use these "fork() and exec()" my 
windows doesnt do anything, python gives an error about the module, 
the kind of error when u know u r wrong.

is it because these commands work on linux?

if so, is it better for me to stick with fedora for my python programs 
or use windows?
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