solve equation python

1>>> from sympy.solvers import solve
2>>> from sympy import Symbol
3>>> x = Symbol('x')
4>>> solve(x**2 - 1, x) #Your equation here
5[-1, 1]
6

1def express(a, b, name):
2    sym = symbols(name)
3    sol = solve(a-sym, b)
4    assert len(sol) == 1
5    return (sym, sol[0])