SymPy - Solving for variable in equation

Question

Is it possible to define an equation and solve a variable in that equation?

D_PWM, Rsense, A = symbols('D_PWM, Rsense, A')

i_out = D_PWM * (A/Rsense)

print i_out

solve(i_out, Rsense)

Result:

A*D_PWM/Rsense
[]

Answer 1

i_out has not been declared as a symbol.

>>> from sympy import *
>>> var('D_PWM, Rsense, A i_out')
(D_PWM, Rsense, A, i_out)
>>> eqn=Eq(i_out,D_PWM * (A/Rsense))
>>> solve(eqn,Rsense)
[A*D_PWM/i_out]