import numpy as np

array = np.array([[1, 2, 3],
                  [4, 5, 6],
                  [7, 8, 9]])

print(f'number of dim:{array.ndim}')
print(f'shape:{array.shape}')
print(f'size:{array.size}')
print(f'dtype:{array.dtype}')

a = np.array([2, 23, 4], dtype=np.int64)
print(a.dtype)

z = np.zeros((3, 4), dtype=np.int64)
print(z)

e = np.empty((3, 4))
print(f'empty:{e},dtype:{e.dtype}')

r = np.arange(10, 20, 2)
print(r)

rr = np.arange(10, 22).reshape((3, 4))
print(rr)

l = np.linspace(0, 10, 20)
print(f'linspace{l},dtype:{l.dtype}')