TGTGInsighttelegram intelligenceLIVE / telegram public index
← Python Заметки
Назад кон каналите

TGINSIGHT SIMILAR POSTS

Најди сличен содржај

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

Погледај објаваПогледај оригинал

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

Hashtags

#define#tricks
Резултати

Пронајдени 23 слични објави

Пребарај: #trumpadministration

当前筛选 #trumpadministration清除筛选
Venezuelanalysis

@venanalysis · Post #1891 · 26.02.2025 г., 21:08

Најди сличноПогледај

🎙PODCAST | The Venezuelanalysis Podcast Episode 34: Opposing Trump’s Fascist Crackdown on Venezuelan Migrants The Trump administration has wasted no time in targeting Venezuelan migrants, with a criminalizing discourse and ongoing human rights violations. More than 100 have been sent to Guantánamo. In VA’s latest podcast, José Luis Granados Ceja and Ricardo Vaz analyze these developments and their impact on US-Venezuela relations. Watch the full episode here: https://youtu.be/C8CzENqGADs?si=c6BKxl6A8re50nR6 #TrumpAdministration#Migration#HumanRights

Hashtags

#trumpadministration#migration#humanrights
Venezuelanalysis

@venanalysis · Post #1832 · 15.12.2024 г., 20:09

Најди сличноПогледај

The outgoing Biden administration weighs withdrawing Chevron’s license. In contrast, lobbyists urge Trump to leverage sanctions to US advantage, with the Jack Gordon Institute laying out an "America-first sanctions policy." Venezuela's oil sector remains heavily constrained by US coercive measures, with output slightly decreasing in November. Read our latest report: https://venezuelanalysis.com/news/venezuelan-oil-output-recedes-as-washington-threatens-new-sanctions/ #Venezuela#Sanctions#TrumpAdministration#Oil

Hashtags

#venezuela#sanctions#trumpadministration#oil
Venezuelanalysis

@venanalysis · Post #2038 · 25.07.2025 г., 02:17

Најди сличноПогледај

📰 NEWS | Trump Administration Reverses Course, Allows Restart of Chevron Operations in Venezuela In an unexpected U-turn, the Trump administration has reportedly allowed Chevron to resume oil drilling and exporting operations in Venezuela. The new specific license might see Chevron and majority partner PDVSA sell their respective crude shares separately. US foreign policy hardliners have been pitted against MAGA advocates concerning sanctions and Chevron's role in Venezuela. Read our report: https://venezuelanalysis.com/news/trump-administration-reverses-course-allows-restart-of-chevron-operations-in-venezuela/ #Chevron#Venezuela#Sanctions#TrumpAdministration

Hashtags

#chevron#venezuela#sanctions#trumpadministration
Venezuelanalysis

@venanalysis · Post #2059 · 10.08.2025 г., 04:35

Најди сличноПогледај

📰 NEWS | Venezuela Decries $50M ‘Narcoterrorism’ Bounty on Maduro as ‘Ridiculous Smokescreen’ The Venezuelan government has blasted the US' decision to raise a "narcoterrorism" bounty against President Nicolás Maduro to $50 million. Caracas labeled the move a "ridiculous smokescreen" as part of baseless accusations to further regime-change narratives. Read the report: https://venezuelanalysis.com/news/venezuela-decries-50m-narcoterrorism-bounty-on-maduro-as-ridiculous-smokescreen/ #NicolasMaduro#NarcoTerrorism#Venezuela#TrumpAdministration

Hashtags

#nicolasmaduro#narcoterrorism#venezuela#trumpadministration
Venezuelanalysis

@venanalysis · Post #1917 · 22.03.2025 г., 18:12

Најди сличноПогледај

📰 NEWS | Venezuela: Chevron Lobbies for Extension as Trump Weighs New Sanctions Scenario Texas-based corporation Chevron could be granted an additional sixty days to wind down its operations in Venezuela. According to sources, the Trump administration is also considering a new sanctions policy favoring US corporations and imposing penalties on other foreign actors. Read our report: https://venezuelanalysis.com/news/venezuela-chevron-lobbies-for-extension-as-trump-weighs-new-sanctions-scenario/ #Oil#Sanctions#Chevron#TrumpAdministration

Hashtags

#oil#sanctions#chevron#trumpadministration
Venture Village Wall 🦄

@venturevillagewall · Post #4292 · 03.03.2025 г., 04:00

Најди сличноПогледај

Sacks Sells Crypto Holdings Amid Review David Sacks, White House AI and crypto czar, sold all his Bitcoin, Solana, and Ethereum holdings post-Trump's inauguration. This move precedes a government ethics review with plans for a full holdings update. More details: FT. #AI#Crypto#VC#Bitcoin#Ethereum#Solana#DavidSacks#CraftVentures#TrumpAdministration

Hashtags

#ai#crypto#vc#bitcoin#ethereum#solana#davidsacks#craftventures#trumpadministration
Venezuelanalysis

@venanalysis · Post #2217 · 23.12.2025 г., 19:23

Најди сличноПогледај

📹 VIDEO | Trump Ramps Up Economic Terrorism Against Venezuela The Trump administration is ramping up its economic terrorism against Venezuela, with new sanctions and blatant acts of piracy. For the Venezuelan people, resistance is not optional. Will international allies step up? Watch our video to learn more. #Venezuela#Sanctions#TrumpAdministration#MultipolarWorld

Hashtags

#venezuela#sanctions#trumpadministration#multipolarworld
12
← ПретходнаСтраница 1 од 2Следна →