from sympy import *
from spb import *
z = symbols("z")
expr = (z - 1) / (z**2 + z + 2)
graphics(
    domain_coloring(expr, (z, -2-2j, 2+2j), n=500, coloring="b"),
    grid=False,
    app=True,
    template={"sidebar_width": "30%"},
    layout="sbl"
)