import numpy as np
plot_parametric(
     (3 * cos(u), 3 * sin(u), (u, 0, 2 * pi), "u [deg]", {"lw": 3}),
     (3 * cos(2 * v), 5 * sin(4 * v), (v, 0, pi), "v [deg]"),
     aspect="equal", tp=np.rad2deg)
# Expected:
## Plot object containing:
## [0]: parametric cartesian line: (3*cos(u), 3*sin(u)) for u over (0, 2*pi)
## [1]: parametric cartesian line: (3*cos(2*v), 5*sin(4*v)) for v over (0, pi)