In general, using SymPy expressions with NumPy functions is not supported, but I think it does make sense to make Number classes (Integer, Float, Rational) work. Can you open an issue about this at https://github.com/sympy/sympy/issues.
I don't know exactly what needs to be done to make this work. Hopefully NumPy provides the proper hooks. Ideally, Rational and Float would be converted to np.float64 and Integer would be converted to np.int64 when used in functions like linspace. Although changing this could potentially be an issue if people are using numpy arrays of Rational currently (which I wouldn't necessarily recommend). Aaron Meurer On Wed, Jul 26, 2023 at 11:37 AM Idan Pazi <[email protected]> wrote: > > Hello, > Is there a way I could configure NumPy or SymPy so that NumPy functions would > accept SymPy numbers (e.g. sympy.Rational)? > > For example: > >>> import numpy as np > >>> import sympy > >>> np.linspace(0, sympy.Rational(1,2), 2) > Traceback (most recent call last): > File "<stdin>", line 1, in <module> > File "<__array_function__ internals>", line 180, in linspace > File > "C:\Users\idank\mambaforge\lib\site-packages\numpy\core\function_base.py", > line 130, in linspace > dt = result_type(start, stop, float(num)) > File "<__array_function__ internals>", line 180, in result_type > TypeError: Cannot interpret '0.500000000000000' as a data type > > >>> np.isnan(sympy.Rational(1,2)) > Traceback (most recent call last): > File "<stdin>", line 1, in <module> > TypeError: ufunc 'isnan' not supported for the input types, and the inputs > could not be safely coerced to any supported types according to the casting > rule ''safe'' > > Background: > I'm using IPython+SymPy+NumPy as a calculator. > For convenience, I automatically convert all divisions and floats to > sympy.Rational > (and display results both as fractions and as decimals) > After such conversions stuff like np.log(2.33) fails. > For more details, see - https://github.com/idanpa/calcpy > > (SymPy version 1.12, NumPy version 1.25.1) > > Thanks! > Idan > > -- > You received this message because you are subscribed to the Google Groups > "sympy" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/sympy/208b8d87-9e7b-4fe9-86fc-9575a0b57002n%40googlegroups.com. -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/CAKgW%3D6L4nAGF%3DYOxoTna7hDfU2UwBaWU94%2B36jUkeT-xqfPWew%40mail.gmail.com.
