newbie: generate a function based on an expression

[Jacob Rael]

Hello,

I would like write a function that I can pass an expression and a
dictionary with values. The function would return a function that
evaluates the expression on an input. For example:

fun = genFun("A*x+off", {'A': 3.0, 'off': -0.5, 'Max': 2.0,  'Min':
-2.0} )

>>> fun(0)
-0.5
>>> fun(-10)
-2
>>> fun(10)
2

so fun would act as if I did:

def fun(x):
    A = 3
    off = -0.5
    Max = 2
    Min = -2
    y = min(Max,max(Min,A*x + off))
    return(y)

Any ideas?

jr