from sympy import *
from spb import *
x = symbols("x")
graphics(
    line((cos(x)+1)/2, (x, -pi, pi), label="a"),
    line(-(cos(x)+1)/2, (x, -pi, pi), label="b"),
    line_parametric_2d(cos(x), sin(x), (x, 0, 2*pi), label="c", use_cm=False),
    title="My title", ylabel="y", aspect="equal"
)
# Expected:
## Plot object containing:
## [0]: cartesian line: cos(x)/2 + 1/2 for x over (-3.141592653589793, 3.141592653589793)
## [1]: cartesian line: -cos(x)/2 - 1/2 for x over (-3.141592653589793, 3.141592653589793)
## [2]: parametric cartesian line: (cos(x), sin(x)) for x over (0.0, 6.283185307179586)