0420057a63473b42e714554e604a12e37e243a37,scipy/spatial/transform/rotation.py,Rotation,__init__,#Rotation#Any#Any#,22

Before Change

            // Warn user for zero (eps?) norm and set to identity quaternion,
            // which (0,0,0,1) in (x,y,z,w) format
            zero_norms = norms == 0
            if zero_norms.any():
                warnings.warn(Found zero norm quaternions in input,
                        replacing with identity quaternions.)
                self._quat[zero_norms] = np.array([0, 0, 0, 1])
            // Normalize each quaternion, ensuring norm is broadcasted along
            // each column.
            self._quat[~zero_norms] /= norms[~zero_norms][:, None]

    @classmethod
    def from_quaternion(cls, quat, normalized=False):

After Change

            // Raise ValueError for zero (eps?) norm quaternions
            zero_norms = norms == 0
            if zero_norms.any():
                raise ValueError("Found zero norm quaternions in `quat`.")

            // Normalize each quaternion, ensuring norm is broadcasted along
            // each column.
            self._quat[~zero_norms] /= norms[~zero_norms][:, None]

    @classmethod
    def from_quaternion(cls, quat, normalized=False):

Instances