socks.py

# You have a basket of socks
# There are a random assortment of socks
# They may have pairs

# Pick a sock out of the basket
# Keep pickings socks, one a time, until you have gone through them all
# Every time you find a match, put them together and set aside

import random
# random.seed(1)
basket = [random.randint(1,4) for i in range(10)]
print(basket)

socks = set()
for sock in basket:
    if sock not in socks:
        socks.add(sock)
    else:
        print("found match: " + str(sock))
        socks.remove(sock)