It is an BitwiseOperators (Bitwise Right Shift):
https://wiki.python.org/moin/BitwiseOperators
All of these operators share something in common — they are “bitwise”
operators. That is, they operate on numbers (normally), but instead of
treating that number as if it were a single value, they treat it as if
it were a string of bits, written in twos-complement binary.
More infos:
https://www.tutorialspoint.com/python/bitwise_operators_example.htm
What does a bitwise shift (left or right) do and what is it used for?
solved What does the Python operator ilshift (<<=)?