np not defined

import numpy as np
...

# import numpy library
import numpy 

# define numpy array
array = numpy.array([[12, 33], [21, 45]]) 

# print values in array format
print(array)

# import numpy library
from numpy import *

# define numpy array
array = array([[12, 33], [21, 45]]) 

# print values in array format
print(array)