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"
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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