Hi, I have been looking for a Python module with math functions that would both eat and spit Decimals. The standard math module eats Decimals allright but spits floats... herefore exp(sin(Decimal())) produces exp () of a float :-(
So far, i found: -AJDecimalMathAdditions (http://www.ajgs.com/programming/ PythonForDownload.html) -decimalfuncs (http://pypi.python.org/pypi/decimalfuncs/1.4) -and dmath (http://pypi.python.org/pypi/dmath/0.9) I tried using the AJDecimalMathAdditions, but ran into issues like dSin (1E4) would take forever to calculate and would result in sin() > 1 ... If i understand it correctly, the program is using maclaurin series to calculate the value and since it does not chop off all the multiples of 2*pi, the maclaurin approximation becomes useless when its too far from x=0. I also ran into some issues with the decimalfuncs, but i have never tried the dmath thing. Now, i can go and start modifying these modules to behave more like the standard math module but since i am neither mathematician or programer, i really hesitate. So my questions are: (1) what do folks use when they need to calculate something like exp (sin(Decimal())) or even more complex things? Any recommendations? Or am I completely missing something? (2) Is there any plan to provide a standard python module that would do that? (Python 4.0? ;-) Thanks for your comments and help, Jerry -- http://mail.python.org/mailman/listinfo/python-list
