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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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NewUU Student Council

@newuu_sc · Post #671 · 23.06.2023 г., 11:35

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📢 Election Update: Renaissance Team Emerges Victorious!🎉 We are thrilled to announce the conclusion of the Student Council elections, held online through Google Forms from June 20 to 22. After an intense battle for leadership, the results are finally in! ✨ Team Renaissance has emerged as the winner, securing an impressive 59.3% of the votes! 🎊 We extend our warmest congratulations to their members for their outstanding campaign and commitment to making a positive impact on our school community. 🏅 We also commend the Sentinels team for their dedication and hard work, as they garnered a respectable 40.7% of the votes. Your participation and contributions have been invaluable throughout this process. We would like to express our gratitude to all candidates who put themselves forward for the Student Council elections. Your passion, ideas, and willingness to serve are truly commendable. A special thanks goes out to every student who participated in the voting process. Your engagement and enthusiasm have played a crucial role in shaping the future of our Student Council and the initiatives it will undertake. Let us now join hands and offer our full support to the Renaissance Team as they embark on their journey of leadership. Together, we can strive to create an inclusive and vibrant school environment that fosters growth, innovation, and collaboration. Best Regards, Student Affairs. 🎓🌟#StudentCouncilElections#Renaissance#Sentinels#Congratulations

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NewUU Student Council

@newuu_sc · Post #639 · 14.06.2023 г., 09:06

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📢 Attention all students of New Uzbekistan University! 🎓 The highly anticipated debates between the two candidates vying for the position of President of the Student Council will take place in the university Conference Hall. 🎙🏛 Join us for an engaging discussion as these candidates present their visions, plans, and goals for the next academic year. It's an excellent opportunity to get to know the potential leaders who will shape our university's future! 🌟✨ Whether you're passionate about academic improvements, extracurricular activities, or enhancing student welfare, this debate is the perfect platform to hear the candidates' perspectives and evaluate their abilities to meet our diverse needs. 📚🎉 Spread the word and see you all there! 🎉🗣 Date: June 16 Time: 16:00 Location: Conference hall #NewUzbekistanUniversity#StudentCouncilElections#Debate2023#Renaissance#Sentinels

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