Right now if you want to use lambdify with numpy you have to explicitly pass 'numpy' as the third argument, like lambdify(x, expr, 'numpy'), as it defaults to math otherwise (technically it defaults to math but falls back to numpy if the function isn't in math).
I've got a PR to change this so that it defaults to numpy always (unless numpy isn't installed of course) at https://github.com/sympy/sympy/pull/11468. If you have an opinion on this one way or another I'd love to hear your comments on the pull request. I know lambdify is one of the most used SymPy functions, so I don't want to take a change like this lightly. Aaron Meurer -- 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 sympy+unsubscr...@googlegroups.com. To post to this group, send email to sympy@googlegroups.com. Visit this group at https://groups.google.com/group/sympy. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/CAKgW%3D6JUFtEM4F1Xw7tNBk24YF4FhOOmnp0u_i0wUOA8gLq9Kg%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
