def angle_between(l1, l2):
        v1 = l1.p2 - l1.p1
        v2 = l2.p2 - l2.p1
        return acos(v1.dot(v2)/(abs(v1)*abs(v2)))
The angle formed between the two linear entities.
dataset/ETHPy150Open sympy/sympy/sympy/geometry/line3d.py/LinearEntity3D.angle_between