import numpy as np
from spb import multiples_of_pi_over_2
plot(tan(x), (x, -1.5*pi, 1.5*pi),
     detect_poles="symbolic", ylim=(-7, 7),
     xlabel="x [deg]", grid=False,
     x_ticks_formatter=multiples_of_pi_over_2())
# Expected:
## Plot object containing:
## [0]: cartesian line: tan(x) for x over (-1.5*pi, 1.5*pi)