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Изворен канал @pythonotes · Post #156 · 2 окт.

Те, кто в Python не первый день, хорошо знают, что на число можно умножить не только число, но и другие типы. Главное, чтобы у этих типов была реализация такой операции. # list >>> [1] * 3 [1, 1, 1] # tuple >>> (2, 3) * 3 (2, 3, 2, 3, 2, 3) # string >>> "A" * 3 "AAA" Так работает полиморфизм стандартных типов. Интересно здесь то, что это сработает и в том случае, когда порядок операндов обратный. То есть int умножить на [тип]. # list >>> 3 * [1] [1, 1, 1] # tuple >>> 3 * (2, 3) (2, 3, 2, 3, 2, 3) # string >>> 3 * "A" "AAA" Если хотите реализовать такое поведение в ваших классах то следует помнить два момента: 1. Если множитель справа, то вам нужно реализовать метод __mul__, наш класс это первый операнд, то есть слева. myType * 3 2. Если множитель слева, то вам нужно реализовать метод __rmul__, наш класс это второй операнд, справа. 3* myType Всё тоже самое можно делать и для других математических операторов. И если в этом примере действие и результат будут фактически одинаковыми, то бывают ситуации, когда это не так. Например, при умножении матриц имеет значение порядок операндов. Для других операторов, таких как деление или сдвиг, очень важно кто с какой стороны находится. >>> 2/4, 4/2 (0.5, 2.0) >>> 2<<3, 3<<2 (16, 12) >>> 100%15, 15%100 (10, 15) #tricks#basic

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Main Event | Sport News

@maineventnews · Post #122 · 01.08.2024 г., 06:00

D'Angelo Russell actively supported his Lakers teammates. He was especially thrilled with Anthony Davis’s alley-oop dunk following LeBron's assist. #Olimpiada 👁Subscribe to Main Event | Sport News

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@maineventnews · Post #121 · 31.07.2024 г., 20:02

Do you remember that Chinese player who is 230 cm tall? He is now an assistant coach for the women's national team. #Olimpiada 👁Subscribe to Main Event | Sport News

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@maineventnews · Post #120 · 31.07.2024 г., 18:03

Jason Tatum and Tyrese Haliburton did not play in the first match against the Serbian national team. Such different reactions! One thinks, "Why am I not playing?" Meanwhile, the other thinks, "I can't believe I'm here." #Olimpiada 👁Subscribe to Main Event | Sport News

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@maineventnews · Post #119 · 31.07.2024 г., 16:01

Any American athlete who wins a gold medal in Paris will receive a bonus of $37,500. That’s just enough for LeBron James to buy a couple of bottles of wine. However, for Hong Kong, winning an Olympic gold medal holds much greater value—$768,000. #Olimpiada 👁Subscribe to Main Event | Sport News

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@maineventnews · Post #118 · 31.07.2024 г., 14:02

The first father-son duo in Olympic history. It can confidently be said that they have outpaced LeBron and Bronny. Bravo! #Olimpiada 👁Subscribe to Main Event | Sport News

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@maineventnews · Post #117 · 31.07.2024 г., 12:02

Griezmann is the top supporter of the French team at the Olympics. He's spending his vacation at the Games and has already attended rugby, gymnastics, swimming, fencing, and equestrian events. #Olimpiada 👁Subscribe to Main Event | Sport News

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@maineventnews · Post #114 · 31.07.2024 г., 06:00

At 229 centimeters tall, Yao Ming looks like a giant compared to the other coaches of the Chinese women's basketball team. #Olimpiada 👁Subscribe to Main Event | Sport News

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@maineventnews · Post #109 · 30.07.2024 г., 12:02

French swimmer Marchand won gold in the 400m individual medley, setting a new Olympic record and taking it from Michael Phelps. #Olimpiada 👁Subscribe to Main Event | Sport News

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@maineventnews · Post #108 · 30.07.2024 г., 10:02

The unexpected hero of the day at the Olympics: a man in bright swim trunks jumped into the water and retrieved the cap that had fallen off a swimmer from the previous race. #Olimpiada 👁Subscribe to Main Event | Sport News

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@maineventnews · Post #80 · 21.07.2024 г., 12:01

The captain of Japan's women's gymnastics team, Seko Miyata, might miss the Olympics because she smoked a week before the Games. The 19-year-old athlete faces exclusion from the team as smoking and purchasing tobacco are illegal in Japan until the age of 20. #Olimpiada 👁Subscribe to Main Event | Sport News

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