numpy

#coding=utf-8 #anthor:ABian import numpy as np x=np.arange(3,5,0.2) x=x.reshape(2,5) print(x) #ravel和flatten可以将数组降为一维，默认为行优先 print(x.ravel()) print(x.flatten()) #改为列优先 print(x.ravel('F')) print(x.flatten('F')) #二者差别,flatten返回的是拷贝，ravel是直接指向 x.ravel()[0]=10 print(x) x.flatten()[9]=10#因为返回的是拷贝，输出以后能发现第十个数没有改变 print(x)