from sympy import *
from spb import *
x, u = symbols("x, u")
a = symbols("a", real=True)
plot_real_imag(sqrt(x) * exp(-u * x**2), prange(x, -3*a, 3*a),
    params={u: (1, 0, 2), a: (1, 0, 2)},
    ylim=(-0.25, 2))