Пользовательская фильтрация :Система рекомендаций

Я знаю, что это не проблема, связанная с кодированием, но это наиболее подходящее место для таких вопросов. Так что, пожалуйста, потерпите меня.

Предположим, у меня есть словарь, подобный приведенному ниже, в котором перечислены десять понравившихся вещей каждого человека

likes={
    "rajat":{"music","x-men","programming","hindi","english","himesh","lil wayne","rap","travelling","coding"},
    "steve":{"travelling","pop","hanging out","friends","facebook","tv","skating","religion","english","chocolate"},
    "toby":{"programming","pop","rap","gardens","flowers","birthday","tv","summer","youtube","eminem"},
    "ravi":{"skating","opera","sony","apple","iphone","music","winter","mango shake","heart","microsoft"},
    "katy":{"music","pics","guitar","glamour","paris","fun","lip sticks","cute guys","rap","winter"},
    "paul":{"office","women","dress","casuals","action movies","fun","public speaking","microsoft","developer"},
    "sheila":{"heart","beach","summer","laptops","youtube","movies","hindi","english","cute guys","love"},
    "saif":{"women","beach","laptops","movies","himesh","world","earth","rap","fun","eminem"}
    "mark":{"pilgrimage","programming","house","world","books","country music","bob","tom hanks","beauty","tigers"},
    "stuart":{"rap","smart girls","music","wrestling","brock lesnar","country music","public speaking","women","coding","iphone"},
    "grover":{"skating","mountaineering","racing","athletics","sports","adidas","nike","women","apple","pop"},
    "anita":{"heart","sunidhi","hindi","love","love songs","cooking","adidas","beach","travelling","flowers"},
    "kelly":{"travelling","comedy","tv","facebook","youtube","cooking","horror","movies","dublin","animals"},
    "dino":{"women","games","xbox","x-men","assassin's creed","pop","rap","opera","need for speed","jeans"},
    "priya":{"heart","mountaineering","sky diving","sony","apple","pop","perfumes","luxury","eminem","lil wayne"},
    "brenda":{"cute guys","xbox","shower","beach","summer","english","french","country music","office","birds"}
}

. Как я могу определить людей, которые имеют похожие предпочтения. Или, может быть, два человека больше всего похожи друг на друга. Также было бы полезно, если бы вы могли указать мне соответствующий пример или руководство для фильтрации на основе пользователей или элементов.