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Изворен канал @pythonotes · Post #32 · 7 фев.

Скорее всего уже слышали, что складывать строки через + это плохая практика. Падение производительности, и всё такое. Без лишних слов, давайте измерять: from timeit import timeit def t1(): # складываем 10 строк через + из переменной t = 'text' for _ in range(1000): s = t + t + t + t + t + t + t + t + t def t2(): # склеиваем список строк через метод join arr = ['text'] * 10 for _ in range(1000): s = ''.join(arr) def t3(): # складываем через + но не из переменной а непосредственно инлайн объекты for _ in range(1000): s = 'text' + 'text' + 'text' + ... # всего 10 раз Теперь каждую строку склейки запустим по 10М раз >>> timeit(t1, number=10000) 0.21951690399964718 >>> timeit(t2, number=10000) 1.4978306379998685 >>> timeit(t3, number=10000) 0.2213820789993406 Хм, а нам говорили что через "+" это плохо и медленно ))) 😁 Тут стоит учитывать, что речь идёт о склейке множества длинных строк. Давайте изменим условия: def t4(): t = 'text'*100 for _ in range(1000): s = t + t + t + t + t + t + t + t + t def t5(): arr = ['text'*100] * 10 for _ in range(1000): s = ''.join(arr) def t6(): for _ in range(1000): s = 'text'*100 + 'text'*100 + ... # всего 10 раз >>> timeit(t4, number=10000) 12.795130728000004 >>> timeit(t5, number=10000) 2.642637542999182 >>> timeit(t6, number=10000) 0.2184546610005782 Вот, уже другой разговор, сразу видна разница, в среднем в 6 раз. Но погодите, почему последний тест t6() по скорости такой же как и t3()? Ведь строки теперь в 100 раз длиннее! Это вопросы оптимизации кода, какие простые изменения ускоряют или замедляют выполнение программы. Мы столкнулись с примером обхода обращения к переменной. Например, именно так работает директива #define в С++, во время компиляции подставляя значение переменной вместо ссылки на неё. В Python это тоже работает, но часто ли вы сможете встретить такой способ работы со строками? К сожалению, способ почти только теоретический. В целом, тесты показали то, что мы хотели. Делаем выводы самостоятельно. Полный листинг 🌍 #tricks

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Embassy of Russia in Singapore

@rusembsg · Post #3154 · 12.06.2024 г., 02:08

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On June 11, 2024, Russian Embassy in Singapore hosted a state reception dedicated to the #NationalDay of the Russian Federation – Russia’s Day. Minister of State for Culture, Community and Youth, Minister of State for Trade and Industry, H.E. Mr. Alvin Tan attended the function as the Chief Guest. Among the guests were Members of the Parliament of Singapore, eminent representatives of business and social, scientific and cultural community, mass media along with Ambassadors and Military Attaches of foreign states and Russian compatriots. In his welcoming speech, Ambassador stressed that Russia remembers and appreciates that Singapore and other ASEAN countries were among the first to recognize the new Russia. He stated that thanks to this step, we have the opportunity today to look together into the face of the emerging new, fair, multipolar world. Ambassador continues mentioning that “even though large distances separate us, even though the natural and geographical conditions in which we have to live vary, even though we have different views with Singapore on the parameters of regional architecture and the genesis of the events in Ukraine, there is something very significant that connects us and is the subject of our common daily concerns”. “This connecting link is the mutual concern about the threats created by the arms race and the prospect of its spreading into outer space! This connecting link remains the common resistance to the dangers created by terrorism, transnational crime and the money laundering schemes that feed them! We rightfully consider our devotion to the ideals of building a drug-free world to be this connecting link! We consider our common efforts to guarantee international information security to be this connecting link, which would securely block the destructive use of the information environment! And finally, closer to the venue of our meeting today, we see such a link in cooperation for building an open and inclusive, free, predictable region based on the inviolable principles of ASEAN centrality”, he noted. “We invite you to take a closer look at the concept of the Greater Eurasian Partnership that we are promoting and to join the triptowards a new, common and indivisible formula for security in Asia and the Pacific as an alternative to conflicting Indo-Pacific concepts of the collective West. I am convinced that our cooperation has a bright future. It should contribute to the creation of a new world community free from the remnants of colonialism”, concluded the Ambassador.

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聖小熊的秘密基地 🇹🇼

@holybeartw · Post #1213 · 10.10.2025 г., 10:18

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🇹🇼 祝大家國慶連假快樂！🇹🇼 中華民國屹立於台灣之島，雖身處天災頻發與地緣緊張的前線，一路以來戰戰兢兢、克服一切困難。我們或許時有歧見與爭論，然而「團結」始終是這片土地上最堅韌而無畏的力量。願我們在相互理解與信任之中，持續邁向更具包容與希望的社會。中華民國台灣萬歲！ #NationalDay#ROC#Taiwan

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