text: import numpy as np
  
  a = np.array([2, 23, 4], dtype=np.int)
  # print(a.dtype)
  b = np.zeros((3, 4))
  # print(b)
  c = np.ones((2, 3))
  # print(c)
  d = np.empty((2, 3))
  # print(d)
  e = np.arange(10, 20, 2)  # [10,20)的间隔为2的区间
  # print(e)
  f = np.arange(12).reshape((3, 4))
  # print(f)
  g = np.linspace(1, 10, 6).reshape((2, 3))
  # 以1为起点，10为终点，生成均等的5个数的数列
  print(g)