Which of the following is NOT a valid operator in Python?

The operator identified as not valid in Python is indeed the one that uses double carets, represented as ^^. In Python, the recognized operators include:

• The double asterisk operator (**) is used for exponentiation, allowing you to raise numbers to a power. For example, 2 ** 3 results in 8.

• The double forward slash operator (//) is utilized for floor division, which divides two numbers and rounds down to the nearest whole number. For instance, 5 // 2 yields 2.

• The percent sign (%) is the modulo operator, providing the remainder of a division operation. For example, 5 % 2 results in 1.

Given these functions, the use of ^^ does not correspond to any defined operation in Python, making it invalid and the correct choice for this question. Understanding valid operators is fundamental in programming as they directly affect arithmetic calculations, logical operations, and overall code functionality.