import numpy as np

a = np.array([1,2])
b = np.array([2,3])

print('a:          ',a)
print('b:          ',b)
print('a.dot(b):   ',a.dot(b))
print('b.dot(a):   ',b.dot(a))
print('np.dot(a,b):',np.dot(a,b))
print('np.dot(b,a):',np.dot(b,a))

