Should be a * after (r1-r3). Eq((r1-r3)*((1-cos(theta-phi)* ddotphi-sin(theta-phi)*dotphi* *2)-2*(r1-r2)*ddottheta,g*sin(theta)))],[ddottheta,ddotphi]))
BR Oscar Den fre 5 nov. 2021 15:00muhammad ramadani fatsey <fats...@gmail.com> skrev: > Traceback (most recent call last): File > "/tmp/sessions/c380e6d285d9328d/main.py", line 6, in <module> > Eq((r1-r3)((1-cos(theta-phi)* > ddotphi-sin(theta-phi)*dotphi**2)-2*(r1-r2)*ddottheta,g*sin(theta)))],[ddottheta,ddotphi])) > TypeError: 'Add' object is not callable > > what am I missing here? > > from sympy import * > a,b,r1, r2, r3, m1,m2,theta,phi,dottheta, dotphi, ddottheta, ddotphi, > g=symbols('a b r1 r2 r3 m1 m2 theta phi dottheta dotphi ddottheta ddotphi > g') > print(solve([Eq((m1+m2)*(2*(r1-r3)*ddotphi+g*sin(phi))-m2*(r1-r2)*((1-cos(theta-phi))* > ddottheta+sin(theta-phi)*dottheta*2),0), > Eq((r1-r3)((1-cos(theta-phi)* > ddotphi-sin(theta-phi)*dotphi**2)-2*(r1-r2)*ddottheta,g*sin(theta)))],[ddottheta,ddotphi])) > > > > -- > 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 view this discussion on the web visit > https://groups.google.com/d/msgid/sympy/72b1f521-8147-4a8a-bcee-201a781dc9fdn%40googlegroups.com > <https://groups.google.com/d/msgid/sympy/72b1f521-8147-4a8a-bcee-201a781dc9fdn%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- 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 view this discussion on the web visit https://groups.google.com/d/msgid/sympy/CAFjzj-LHt3jr0yQUAvxJiEpLPG1ZjfCCJWOfPiw%3D7FPnaQ%3DvtA%40mail.gmail.com.