How to use the svgpathtools.bezier.bezier_by_line_intersections function in svgpathtools

if np.isclose(denom, 0):
                return []
            t1 = (c[0]*(b[0] - d[1]) -
                  c[1]*(b[0] - d[0]) -
                  a[0]*(d[0] - d[1]))/denom
            t2 = -(a[1]*(b[0] - d[0]) -
                   a[0]*(b[1] - d[0]) -
                   c[0]*(b[0] - b[1]))/denom
            if 0 <= t1 <= 1 and 0 <= t2 <= 1:
                return [(t1, t2)]
            return []
        elif isinstance(other_seg, QuadraticBezier):
            t2t1s = bezier_by_line_intersections(other_seg, self)
            return [(t1, t2) for t2, t1 in t2t1s]
        elif isinstance(other_seg, CubicBezier):
            t2t1s = bezier_by_line_intersections(other_seg, self)
            return [(t1, t2) for t2, t1 in t2t1s]
        elif isinstance(other_seg, Arc):
            t2t1s = other_seg.intersect(self)
            return [(t1, t2) for t2, t1 in t2t1s]
        elif isinstance(other_seg, Path):
            raise TypeError(
                "other_seg must be a path segment, not a Path object, use "
                "Path.intersect().")
        else:
            raise TypeError("other_seg must be a path segment.")

d = (other_seg.start.imag, other_seg.end.imag)
            denom = ((a[1] - a[0])*(d[0] - d[1]) -
                     (b[1] - b[0])*(c[0] - c[1]))
            if np.isclose(denom, 0):
                return []
            t1 = (c[0]*(b[0] - d[1]) -
                  c[1]*(b[0] - d[0]) -
                  a[0]*(d[0] - d[1]))/denom
            t2 = -(a[1]*(b[0] - d[0]) -
                   a[0]*(b[1] - d[0]) -
                   c[0]*(b[0] - b[1]))/denom
            if 0 <= t1 <= 1 and 0 <= t2 <= 1:
                return [(t1, t2)]
            return []
        elif isinstance(other_seg, QuadraticBezier):
            t2t1s = bezier_by_line_intersections(other_seg, self)
            return [(t1, t2) for t2, t1 in t2t1s]
        elif isinstance(other_seg, CubicBezier):
            t2t1s = bezier_by_line_intersections(other_seg, self)
            return [(t1, t2) for t2, t1 in t2t1s]
        elif isinstance(other_seg, Arc):
            t2t1s = other_seg.intersect(self)
            return [(t1, t2) for t2, t1 in t2t1s]
        elif isinstance(other_seg, Path):
            raise TypeError(
                "other_seg must be a path segment, not a Path object, use "
                "Path.intersect().")
        else:
            raise TypeError("other_seg must be a path segment.")

def intersect(self, other_seg, tol=1e-12):
        """Finds the intersections of two segments.
        returns a list of tuples (t1, t2) such that
        self.point(t1) == other_seg.point(t2).
        Note: This will fail if the two segments coincide for more than a
        finite collection of points."""
        if isinstance(other_seg, Line):
            return bezier_by_line_intersections(self, other_seg)
        elif (isinstance(other_seg, QuadraticBezier) or
              isinstance(other_seg, CubicBezier)):
            assert self != other_seg
            longer_length = max(self.length(), other_seg.length())
            return bezier_intersections(self, other_seg,
                                        longer_length=longer_length,
                                        tol=tol, tol_deC=tol)
        elif isinstance(other_seg, Arc):
            t2t1s = other_seg.intersect(self)
            return [(t1, t2) for t2, t1 in t2t1s]
        elif isinstance(other_seg, Path):
            raise TypeError(
                "other_seg must be a path segment, not a Path object, use "
                "Path.intersect().")
        else:
            raise TypeError("other_seg must be a path segment.")

def intersect(self, other_seg, tol=1e-12):
        """Finds the intersections of two segments.
        returns a list of tuples (t1, t2) such that
        self.point(t1) == other_seg.point(t2).
        Note: This will fail if the two segments coincide for more than a
        finite collection of points."""
        if isinstance(other_seg, Line):
            return bezier_by_line_intersections(self, other_seg)
        elif isinstance(other_seg, QuadraticBezier):
            assert self != other_seg
            longer_length = max(self.length(), other_seg.length())
            return bezier_intersections(self, other_seg,
                                        longer_length=longer_length,
                                        tol=tol, tol_deC=tol)
        elif isinstance(other_seg, CubicBezier):
            longer_length = max(self.length(), other_seg.length())
            return bezier_intersections(self, other_seg,
                                        longer_length=longer_length,
                                        tol=tol, tol_deC=tol)
        elif isinstance(other_seg, Arc):
            t2t1s = other_seg.intersect(self)
            return [(t1, t2) for t2, t1 in t2t1s]
        elif isinstance(other_seg, Path):
            raise TypeError(