import numpy as np
import sys 


def add(a1, a2):
    #raise Exception("Test")
    x = np.array(a1, dtype=np.float64)
    y = np.array(a2, dtype=np.float64)    
    return np.add(x, y).tolist()


if __name__ == "__main__":    
    print sys.argv    
    x = np.array([[1,2],[3,4]], dtype=np.float64)
    y = np.array([[5,6],[7,8]], dtype=np.float64)
    print "---------------"
    print x + y
    print np.add(x, y)
    print np.add(x, y).tolist()
    print "---------------"
    print x - y
    print np.subtract(x, y)
    print "---------------"
    print x * y
    print np.multiply(x, y)
    print "---------------"
    print x / y
    print np.divide(x, y)
    print "---------------"
    print np.sqrt(x)
    print "---------------"