Everything Science
@everything_science · Post #3492 · 06.06.2025 г., 07:15
Trump threatens to remove ALL of Elon Musk's government contracts after Elon turns against Trump. #Latest 🔔@Everything_Science
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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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Everything Science
@everything_science · Post #3481 · 30.05.2025 г., 12:23
Elon Musk has officially left the Trump administration and DOGE due to disagreement with Trump. #Latest 🔔@Everything_Science
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Everything Science
@everything_science · Post #3451 · 12.05.2025 г., 18:23
Man was arrested after dating 35 different women at the same time and telling each of them a different birthday so he could get gifts. Meet Takashi Miyagawa, a man who was arrested in Japan after dating 35 different women at the same time—and telling each one a different birthday to collect gifts! 🎁😳 His strategy? He'd convince each woman that his birthday was on a different day of the year, so he could rack up presents—from cash to clothing. In total, he tricked them out of over ¥100,000 (roughly £665). 😤 Talk about playing the system! He even used his job selling hydrogen water showerheads to meet new women. 😒 #Latest 🔔@Everything_Science
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Everything Science
@everything_science · Post #3381 · 06.04.2025 г., 18:58
Women can now choose their own clothing no men permission needed. #Latest 🔔@Everything_Science
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Everything Science
@everything_science · Post #3368 · 01.04.2025 г., 16:21
76-year-old woman gives birth to the first child after decades of trying. #Latest 🔔@Everything_Science
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Everything Science
@everything_science · Post #3345 · 20.03.2025 г., 11:48
Glasses given to visitors at a zoo so they don't make direct eye contact with the gorillas. #Latest 🔔@Everything_Science
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Everything Science
@everything_science · Post #3326 · 09.03.2025 г., 18:14
Plastic waste can be turned into vanila flavoring with genetically engineered bacteria as a way to supply Vanilin, the compound that carries most of the smell and taste of vanilla, and reduce plastic pollution at the same time. #Latest 🔔@Everything_Science
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Everything Science
@everything_science · Post #3311 · 27.02.2025 г., 20:36
A Saudi man has married three women, including a student and a teacher from the same school, as well as the institution’s principal, Saudi-based daily Okaz has reported, according to Al-Arabiya. Additionally, the 50-year-old man also has another wife who works as an educational supervisor at the same school, #Latest 🔔@Everything_Science
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Everything Science
@everything_science · Post #2515 · 08.04.2024 г., 11:05
Police in India say a woman whose belly was cut open with a sickle by her husband has given birth to a stillborn boy. Family alleged that the man attacked her because he wanted to check the baby's gender. They have five daughters and the man has been putting pressure on his wife to deliver a son. #Latest 🔔@Everything_Science
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Daily Political Press
@dailypolitical · Post #13 · 08.04.2026 г., 13:31
📰Colorado Lawmakers Consider Bill Allowing Older Adults to Opt Out of Jury Duty in State Courts 🔗https://dailycoloradonews.com/colorado-lawmakers-consider-bill-older-adults-opt-out-jury-duty/?utm_source=telegram&utm_medium=social&utm_campaign=zimm-distribute via Daily Political Press #Courts#Colorado#Lawmakers#Consider#Latest
Daily Political Press
@dailypolitical · Post #12 · 08.04.2026 г., 13:31
📰Colorado Lawmakers Consider Bill Allowing Older Adults to Opt Out of Jury Duty in State Courts 🔗https://dailycoloradonews.com/colorado-lawmakers-consider-bill-older-adults-opt-out-jury-duty/?utm_source=telegram&utm_medium=social&utm_campaign=zimm-distribute via Daily Political Press #Courts#Colorado#Lawmakers#Consider#Latest
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@desi_memes_funny_jokes · Post #4945 · 04.07.2024 г., 04:16
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