[Edu-sig] Algebra + Python
Kirby Urner
pdx4d@teleport.com
Mon, 30 Apr 2001 22:05:00 -0700
>Kirby wrote:
>> There may be a better way to write the factory function than
>> I've shown below. I'd like to see other solutions:
>>
>> >>> def makepoly(A,B,C):
>> """
>> Build a polynomial function from coefficients
>> """
>> return eval("lambda x: %s*x**2 + %s*x + %s" % (A,B,C))
>
>How about this?
>
> class poly:
> def __init__(self, A, B, C):
> self.A, self.B, self.C = A, B, C
> def __call__(self, x):
> return self.A * x**2 + self.B * x + self.C
>
> >>> f = poly(2,3,4)
> >>> f(10)
> 234
I like it!
Kirby