what is the use of in python code example

Example 1: //= python meaning

#Performs floor-division on the values on either side. Then assigns it to the expression on the left.
>>> a=6
>>> a//=3
>>> print(a)
2

Example 2: x and y in python

x > y is False
x < y is True
x == y is False
x != y is True
x >= y is False
x <= y is True