import numpy as np
a = np.arange(24)
print(a)        #输出为 [ 0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 21 22 23]
print(a.ndim)   #输出为 1
b = a.reshape(2,4,3)
print(b)        #输出为 [[[ 0  1  2]
                #        [ 3  4  5]
                #        [ 6  7  8]
                #        [ 9 10 11]]
                #       [[12 13 14]
                #        [15 16 17]
                #        [18 19 20]
                #        [21 22 23]]]
print(b.ndim)   #输出为 3
print(b.shape)  #输出为 (2, 4, 3)

‘‘‘
输出为 [[1 2 3]
        [4 5 6]]
      (2, 3)
      [[1 2]
       [3 4]
       [5 6]]
‘‘‘
import numpy as np
a = np.array([[1,2,3],[4,5,6]])
print(a)
print(a.shape)
#调整数组大小
a = np.array([[1,2,3],[4,5,6]])
a.shape=(1,6)   #输出为 [[1 2 3 4 5 6]]
print(a)
# reshape 调整数组大小
b = a.reshape(3,2)
print(b)        #输出为  [[1 2]
#                        [3 4]
#                        [5 6]]