Scott David Daniels wrote:
> max wrote:
>
>> Larry Bates <[EMAIL PROTECTED]> wrote in
>> news:[EMAIL PROTECTED]:
>>
>>> Python has built in eval function and doesn't require a library.
>>
>>
>> Are you kidding? Read the original post a little more closely. The
>> o.p. is looking for a library that evaluates mathematical expressions
>> and is callable from python code.
>
>
> He is absolutely correct.
> From the web page referenced:
>
> ucDefineFunction("area(length,width) = length*width");
> ucDefineFunction("frac(x)=abs(abs(x)-int(abs(x)))");
> ucDefineFunction("test() = 5");
> ucDefineFunction("abc(x, y=10) = x + y");
> ucDefineFunction("shl[x, y] = x * 2^y");
>
> cout.precision(16);
> cout << ucEval("frac(150/17) * area(20,30)") << endl;
> cout << ucEval("abc(5)-abc(3,4)*(#b01101 shl 1)")
> << endl;
>
>
> The python equivalent:
>
> exec "def area(length,width): return length*width"
> exec "def frac(x): return abs(abs(x) - int(abs(x)))"
> exec "def test(): return 5"
> exec "def abc(x, y=10): return x + y"
> exec "def shl(x, y): return x * 2^y"
Perhaps this should be:
exec "def shl(x, y): return x * 2 ** y"
or
exec "def shl(x, y): return x << y"
>
> print eval("frac(150/17) * area(20,30)")
> print eval("abc(5) - abc(3,4) * shl(0x0E, 1)")
>
> --Scott David Daniels
> [EMAIL PROTECTED]
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