Implement Variable Swap in Python | Dataford Interview Questions

In a Crédit Agricole CIB market-data preprocessing step, two locally held values may need to exchange positions. Implement a function that swaps two Python values and returns them in reversed order.

The function must use Python tuple unpacking rather than an explicit temporary variable. It must not modify any external data structure, and the original argument variables do not need to change because Python arguments are passed by assignment.

Formal Specification

Implement swap_values(first, second).

Input: Two Python values, first and second. The values may be integers, strings, floats, or other directly assignable Python objects.
Output: A two-element tuple (second, first) containing the values in swapped order.
The function should perform the swap in constant time and use constant auxiliary space.

Constraints

Exactly two arguments are provided.
Inputs are valid Python values.
The swap must not use an explicit temporary variable.
Return a two-element tuple containing the values in reversed order.

Function Signature

def swap_values(first, second):

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