sir ,it can not run

[jacksparal]

def predict(self, X1, X2):
    """Predict`lanes using the estimated model.
    Parameters
      X1, X2.
    Returns
      y1, y2
    """
    return X1 @ self.w1_, X2 @ self.w2_

it is in lane_simple_ransac.py. could you tell me what @ means here? thanks

[balancap]

It's the matrix multiplication symbol, introduced in Python 3 if I am correct.