10对数组维度进行改变
a = np.random.randint(1,26, size = 28)
print(a)
b = a.reshape(2,2,7)
print(b)
vv = np.reshape(a,(2,2,7))
print(vv)
cc = vv.reshape(28)
cc = vv.reshape(-1)
print(cc)
通过ravel、flatten函数将多维数组转为一组数组
a = b.ravel()
dd = b.flatten()
print(a)
print(dd)
