squared functions--most Pythonic way?

[Sean 'Shaleh' Perry]

> 
> functional programming:
> 
>     # with an internal named function
>     def fsquare(f):
>         def f2(x):
>             return f(x)**2
>         return f2
> 

this seems to be the most pythonic (lambda is not the preferred approach
usually).

Of course someone will mention taking this to the next step with a compose()
function which take f(x) and g(x).