import numpy as np

x=np.array([ [1,2,3],[4,5,6] ])
y=np.array([ [2,9],[4,5],[8,1] ])

x.dot(y) # dot product

print(
  "type:",type(x),"\n",
  "shape:",x.shape,"\n",
  "size:",x.size,"\n",
  "dimension:",x.ndim,"\n",
  "datatype:",x.dtype,"\n",
  "bytes:",x.nbytes)

x=np.array([ [1,2,3],[4,5,6] ], dtype=np.float64)
x=np.array([ [1,2,3],[4,5,6] ], dtype=np.complex64)
x=np.array([ [1,2,3],[4,5,6] ], dtype=np.uint32)