p49页给人误导
正确程序如下:
from numpy.random import randn
import numpy as np
data = {i :randn() for i in range(7)}
data
即先执行“from numpy.random import randn”
p49页给人误导
正确程序如下:
from numpy.random import randn
import numpy as np
data = {i :randn() for i in range(7)}
data
即先执行“from numpy.random import randn”