?? operator in python code example

Example 1: operators in python

# Python Operators
Operator	Name			Example
+			Addition		x + y	
-			Subtraction		x - y	
*			Multiplication	x * y	
/			Division		x / y	
%			Modulus			x % y	
**			Exponentiation	x ** y	
//			Floor division	x // y

Example 2: python operators

#PYTHON RELATIONAL OPERATORS
OPERATOR    DESCRIPTION	        SYNTAX  FUNCTION        IN-PLACE METHOD
>	        Greater than	    a > b   gt(a, b)        __gt__(self, other)
>=	        Greater or equal to	a >= b  ge(a, b)        __ge__(self, other)
<	        Less than	        a < b   lt(a, b)        __lt__(self, other)
<=	        Less or equal to	a <= b  le(a, b)        __le__(self, other)
==	        Equal to	        a == b  eq(a, b)        __eq__(self, other)
!=	        Not equal to        a != b  ne(a, b)        __ne__(self, other)

#PYTHON MATHEMATICAL OPERATORS
OPERATOR	DESCRIPTION	        SYNTAX  FUNCTION        IN-PLACE METHOD
+	        Addition	        a + b   add(a, b)       __add__(self, other)
–	        Subtraction	        a - b   sub(a, b)       __sub__(self, other)
*	        Multiplication	    a * b   mul(a, b)       __mul__(self, other)
/	        True Division	    a / b   truediv(a, b)   __truediv__(self, other)
//	        Floor Division	    a // b  floordiv(a, b)  __floordiv__(self, other)
%	        Modulo	            a % b   mod(a, b)       __mod__(self, other)
**	        Power	            a ** b  pow(a, b)       __pow__(self, other)

#PYTHON BITWISE OPERATORS
OPERATOR	DESCRIPTION	        SYNTAX  FUNCTION        IN-PLACE METHOD
&	        Bitwise AND	        a & b   and_(a, b)      __and__(self, other)
|	        Bitwise OR	        a | b   or_(a,b)        __or__(self, other)
^	        Bitwise XOR	        a ^ b   xor(a, b)       __xor__(self, other)
~           Bitwise NOT         ~ a     invert(a)       __invert__(self)
>>          Bitwise R shift     a >> b  rshift(a, b)    __irshift__(self, other)
<<          Bitwise L shift     a << b  lshift(a, b)    __lshift__(self, other)