为了了解(正态)分布的方法和属性,我们首先引入norm >>>from scipy.stats import norm >>>rv = norm() >>>dir(rv) # reformatted [‘__class__', ‘__delattr__', ‘__dict__', ‘__doc__', ‘__getattribute__', ‘__hash__', ‘__init__', ‘__module__', ‘__new__', ‘__reduce__', ‘__reduce_ex__', ‘__repr__', ‘__setattr__', ‘__str__', ‘__wea