np.random.normal () means that a normal, normal meaning of this is normal.
numpy.random.normal(loc,scale,size)
Meaning is as follows:
Parameter loc (float): mean normal distribution, corresponding to the center of the distribution. loc = 0 to illustrate a Y-axis as an axis of symmetry normal distribution,
parametric scale (float): standard deviation of the normal distribution, corresponding to the width of the distribution, scale, the more chunky normal distribution curve, scale the small, thin curve higher.
Parameter size (int or an integer tuple)
