What is the correct syntax to swap two variables in Python?

The correct syntax to swap two variables in Python is to use the tuple unpacking feature, which allows for a concise and efficient swapping operation. The statement that achieves this swaps the values of variable_1 and variable_2 in a single line by creating a tuple on the right side of the assignment and unpacking it into the variables on the left side.

When you write variable_1, variable_2 = variable_2, variable_1, Python evaluates the right-hand side first, creating a tuple with the current values of variable_2 and variable_1. Then, it assigns the first element of the tuple to variable_1 and the second element to variable_2, effectively swapping their values.

This approach is not only syntactically elegant but also avoids the need for a temporary variable or multiple assignment statements, which can be more cumbersome and less readable. This method showcases the power of Python’s tuple unpacking and is a widely accepted idiom for swapping values in Python programming.