@ operator in python 3.5

Today I learned there is an operator "@" in python 3.5. If you just type 5 @ 5 in python REPL, you will see the next message

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-1-c59396881bea> in <module>()
----> 1 5 @ 5

TypeError: unsupported operand type(s) for @: 'int' and 'int'

New python syntax supports @ operator, however there are no built-in types which can be operands of this operators.

But numpy is.

There is a little example below:

import numpy as np

X = np.array([[1, 2, 3],
              [1, 2, 3],
              [1, 2, 3]])
X @ X

There is a very weird behaviour of pygments, it suggests "@" operator is a mistake, but don't care. As you might guess, @ is a matrix multiplication operator. However I suggest, that this is not the only thing for what this operator can be used.