On Nov 19, 2007 1:05 AM, Dick Moores <[EMAIL PROTECTED]> wrote: > At 03:42 PM 11/18/2007, Dennis Lee Bieber wrote: > >On Sun, 18 Nov 2007 13:02:01 -0800, Dick Moores <[EMAIL PROTECTED]> > >declaimed the following in comp.lang.python: > > > > > > > > This gets: > > > Traceback (most recent call last): > > > File "E:\PythonWork\Untitled 5.py", line 20, in <module> > > > term = (e**(1/n))/(e**(1/(n+1))) > > > TypeError: unsupported operand type(s) for /: 'int' and 'Float' > > > > > Seems self-explanatory... try using 1.0 rather than 1 > > term = (e**(1.0/n))/(e**(1.0/(n+1))) > TypeError: unsupported operand type(s) for /: 'float' and 'Float'
Hi Dick, I recognize you from python-list, where you had a question about mpmath. Your code still won't work if you convert the numbers to Floats because the Float type in sympy.numerics does not implement ** for fractional numbers. You could use the exp function in sympy.numerics.functions instead to compute e**x. Basically, sympy.numerics is an old version of mpmath. The sympy.numerics module is not very well integrated in SymPy, slower than mpmath, and has a couple bugs that have subsequently been fixed in mpmath. In sympycore (http://code.google.com/p/sympycore/), we're using the latest version of mpmath and integrating it directly into the symbolic engine; it will be much more robust and user-friendly. It will hopefully not be long until we merge the improvements we've done in the sympycore project with the main SymPy branch. Fredrik -- http://mail.python.org/mailman/listinfo/python-list
