Secret Santa

import random

def secret_santa(names):
    """
    Given a list of names, randomly match each person with another person for Secret Santa.
    Returns a dictionary where the keys are the names and the values are the names of the people they will give a gift to.
    """
    ### create a list
    participants = list(names)
    ### shuffle the list, all of the lists with the same names will be diferents
    random.shuffle(participants)
    ### create a dictionary
    matchings = {}
    
    for i in range(len(participants)):
        matchings[participants[i]] = participants[(i + 1) % len(participants)]
    return matchings

if __name__ == '__main__':
    ### block at the bottom of the program is run only if the program is executed directly (as opposed to being imported as a module)
    ### Example usage:
    names = []
    while True:
        name = input("Enter a name (or leave blank to stop): ")
        if name:
            names.append(name)
        else:
            break
    matchings = secret_santa(names)
    print("Secret Santa matchings:")
    for name, recipient in matchings.items():
        print(f"{name} will give a gift to {recipient}.")