numpy中 运算符测试

    a = np.array([1, 2, 3, 4])
    b = np.array([1, 2, 1, 2])
    
    print a + b
    print a - b
    print a * b
    print a / b
    print a ** b

[2 4 4 6]
[0 0 2 2]
[1 4 3 8]
[1 1 3 2]
[ 1  4  3 16]

    a = np.array([1, 2, 3, 4])
    b = 2
    
    print a + b
    print a - b
    print a * b
    print a / b
    print a ** b
    

[3 4 5 6]
[-1  0  1  2]
[2 4 6 8]
[0 1 1 2]
[ 1  4  9 16]

   a = np.array([True, True, False, False])
    b = np.array([True, False, True, False])
    
    print a & b
    print a | b
    print ~a
    
    print a & True
    print a & False
    
    print a | True
    print a | False
    

[ True False False False]
[ True  True  True False]
[False False  True  True]
[ True  True False False]
[False False False False]
[ True  True  True  True]
[ True  True False False]

    a = np.array([1, 2, 3, 4, 5])
    b = np.array([5, 4, 3, 2, 1])
    
    print a > b
    print a >= b
    print a < b
    print a <= b
    print a == b
    print a != b

[False False False  True  True]
[False False  True  True  True]
[ True  True False False False]
[ True  True  True False False]
[False False  True False False]
[ True  True False  True  True]

    a = np.array([1, 2, 3, 4])
    b = 2
    
    print a > b
    print a >= b
    print a < b
    print a <= b
    print a == b
    print a != b

[False False  True  True]
[False  True  True  True]
[ True False False False]
[ True  True False False]
[False  True False False]
[ True False  True  True]