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@ReadAloudESL · Post #512 · 28.07.2020 г., 19:10
3️⃣1️⃣ College Majors 🔉Listen to the recording and answer the questions. 👇🏻👇🏻👇🏻👇🏻👇🏻👇🏻👇🏻👇🏻 Good luck!🍀 🎧🗣#Conversations🗣🎧 @ReadAloudESL
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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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@ReadAloudESL · Post #489 · 09.07.2020 г., 14:48
2️⃣9️⃣ Baking Cookies.mp3 🔉Listen to the recording and answer the questions.👇🏻 Good luck!🍀 🎧🗣#Conversations🗣🎧 @ReadAloudESL
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@ReadAloudESL · Post #396 · 18.04.2020 г., 16:09
2️⃣7️⃣A Hiking Family.mp3 🔉Listen to the recording and answer the questions.👇🏻 Good luck!🍀 🎧🗣#Conversations🗣🎧 @ReadAloudESL
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@ReadAloudESL · Post #357 · 12.04.2020 г., 14:27
2️⃣5️⃣A Healthy Lifestyle.mp3 🔉Listen to the recording and answer the questions.👇🏻 Good luck!🍀 🎧📖#Conversations📖🎧 @ReadAloudESL
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@ReadAloudESL · Post #307 · 29.03.2020 г., 15:31
2️⃣3️⃣Barbecue Party.mp3 🔉Listen to the recording and answer the questions.👇🏻 Good luck!🍀 🎧📖#Conversations📖🎧 @ReadAloudESL
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@ReadAloudESL · Post #248 · 18.03.2020 г., 16:22
🔉Listen to the phone message and answer the questions.👇🏻 Good luck!🍀 🎧📖#Conversations📖🎧 @ReadAloudESL
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@ReadAloudESL · Post #542 · 16.08.2020 г., 07:58
3️⃣5⃣ Identity Theft 💻 🔉Listen to the recording and read along with the conversation. Review the key #vocabulary and the sample sentences.👇🏻 🎧🗣#Conversations🗣🎧 @ReadAloudESL
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@ReadAloudESL · Post #530 · 07.08.2020 г., 13:51
3️⃣3⃣ Driver's License 💳 🔉Listen to the recording and read along with the conversation. Review the key #vocabulary and the sample sentences.👇🏻 🎧🗣#Conversations🗣🎧 @ReadAloudESL
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@ReadAloudESL · Post #260 · 19.03.2020 г., 10:53
2️⃣1️⃣A day at School 👱🏻♂️Randall: Hello. Today I'm interviewing Joshua on his experiences going to a Japanese school. Now Joshua, what time do you go to school? 👦🏻Joshua: Eight O'clock. 👱🏻♂️Randall: Eight O'clock. And do you go by yourself, or on a school bus? 👦🏻Joshua: No, I have a group that goes with me. 👱🏻♂️Randall: So you go with a group? 👦🏻Joshua: Uh-huh. 👱🏻♂️Randall: Now what kinds of things do you take to school? 👦🏻Joshua: I take my taiso fuku, that is gym clothes, and I take my backpack and my books [ Oh, okay. ] and stuff like that. 👱🏻♂️Randall: Okay and what is the first thing you do when you get to school? 👦🏻Joshua: We do "kiritsu, rei." 👱🏻♂️Randall: "Kiritsu" and "rei." Now what are those? 👦🏻Joshua: It means "stand up, bow." 👱🏻♂️Randall: Stand up and bow. 👦🏻Joshua: Uh-huh. 👱🏻♂️Randall: And what do you study at school? 👦🏻Joshua: We study kokugo, that is writing and reading and stuff like that [ Okay], and sansu, that's math. [ Okay. ]. And, let's see . . . , we do gym too. 👱🏻♂️Randall: Okay, and where do you eat lunch? Do you have a lunchroom or cafeteria? 👦🏻Joshua: No, we eat in our classroom. 👱🏻♂️Randall: You eat in your classroom! [ Yeah. ]. Oh wow. That is very interesting. Now what time do you come home from school? 👦🏻Joshua: We come home sometimes at 3:00 and sometimes at 2:00. 👱🏻♂️Randall: Okay, well thank you very much Joshua. 👦🏻Joshua: You're welcome. 📚#Vocabulary and Sample Sentences ✨stuff(noun): things ✨أغراض؛ أشياء؛ حاجات؛ لوازم؛ ضرورات 🔻Please put your stuff in your backpacks. ✨bow (verb): bend your head and waist to show respect and thanks to another person ✨ينحني؛ أن تخفض رأسك و خصرك لإظهار التحية و الاحترام و الشكر للشخص الآخر (يعتبر هذا السلوك من عادات و تقاليد الشعب الياباني)👘 🔻You should bow in Japan when you meet people in formal situations. 🎧📖#Conversations📖🎧 @ReadAloudESL
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@wangzhuanzhan · Post #33090 · 15.09.2024 г., 06:51
Y-y与y女n人r们m的d对d话h- 与女人们的对话 Conversations with Other Women (2005) 直达链接：https://pan.quark.cn/s/3a249657a3f6 #与女人们的对话#爱情交响曲#女人秘谈 #Conversations with Other Women 链接：https://link3.cc/sf_com #电影#喜剧#美国#00年代
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@venturevillagewall · Post #3634 · 21.12.2024 г., 10:23
$5.4M Funding for Tenor Tenor has raised $5.40 million on December 19, 2024. This platform enables managers to rehearse difficult conversations with realistic voice AI characters and receive instant feedback for improvement. #Funding#AI#VoiceAI#Management#Feedback#Conversations#Tech#Startup#Investment#Training#Innovation#Leadership#Simulation#Dialogue#PersonalDevelopment#Business#Growth#Application#Software#Tenor