Actually, hbar also works if you import it (and this makes more sense than importing the class):
from sympy.physics.quantum.constants import hbar and then ...subs(hbar, 1). HBar is a class name, but the module also creates an instance of that class, called hbar. On Tuesday, December 26, 2017 at 3:40:20 PM UTC-5, Julian L wrote: > > Hi, > I am using sympy.physics.qho_1d to get the eigenfunctions and evaluate > them numerically with numpy and lambdify, and I want to use units where > hbar = 1. > I've tried things like: > > (qho.psi_n(0, 0, 1, 1)).subs(hbar, 1.0) > (expr.subs(hbar, 1.0)).evalf() > lambdify(hbar, expr, "numpy") > > but it doesn't work and always returns 1/(hbar**(1/4)*pi**(1/4)) or an > error. > How can I do it well? > > Julian > -- 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/2e5adedc-dbeb-4ecc-925c-77ec960dee61%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
