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Изворен канал @pythonotes · Post #156 · 2 окт.

Те, кто в Python не первый день, хорошо знают, что на число можно умножить не только число, но и другие типы. Главное, чтобы у этих типов была реализация такой операции. # list >>> [1] * 3 [1, 1, 1] # tuple >>> (2, 3) * 3 (2, 3, 2, 3, 2, 3) # string >>> "A" * 3 "AAA" Так работает полиморфизм стандартных типов. Интересно здесь то, что это сработает и в том случае, когда порядок операндов обратный. То есть int умножить на [тип]. # list >>> 3 * [1] [1, 1, 1] # tuple >>> 3 * (2, 3) (2, 3, 2, 3, 2, 3) # string >>> 3 * "A" "AAA" Если хотите реализовать такое поведение в ваших классах то следует помнить два момента: 1. Если множитель справа, то вам нужно реализовать метод __mul__, наш класс это первый операнд, то есть слева. myType * 3 2. Если множитель слева, то вам нужно реализовать метод __rmul__, наш класс это второй операнд, справа. 3* myType Всё тоже самое можно делать и для других математических операторов. И если в этом примере действие и результат будут фактически одинаковыми, то бывают ситуации, когда это не так. Например, при умножении матриц имеет значение порядок операндов. Для других операторов, таких как деление или сдвиг, очень важно кто с какой стороны находится. >>> 2/4, 4/2 (0.5, 2.0) >>> 2<<3, 3<<2 (16, 12) >>> 100%15, 15%100 (10, 15) #tricks#basic

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Пронајдени 95 слични објави

Пребарај: #cholera

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As of 29th September, over 10,000 suspected cases of #cholera have been recorded from the 36 States + FCT. The ongoing cholera outbreak has been worsened by limited access to clean water, open defecation, & poor hygiene practices in affected communities. 🔗Download the situation report https://ncdc.gov.ng/diseases/sitreps/?cat=7&name=An%20update%20of%20Cholera%20outbreak%20in%20Nigeria

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In reporting week 32, the number of suspected cases of #cholera increased to 121 cases. Our weekly situation report provides an update on the current #cholera epidemiological situation in Nigeria and our response activities. 🔗 Download via: https://ncdc.gov.ng/diseases/sitreps/?cat=7&name=An%20update%20of%20Cholera%20outbreak%20in%20Nigeria

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Our weekly #cholera situation report for weeks 28 and 29 has been uploaded. The reports provide an update on the current #cholera epidemiological situation in Nigeria and our response activities. 🔗 Download via: https://ncdc.gov.ng/diseases/sitreps/?cat=7&name=An%20update%20of%20Cholera%20outbreak%20in%20Nigeria

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Your actions, no matter how small can limit the risk of #cholera infection. 🚫Do not defecate in open areas 🧤Clear your drainages ✅Only drink water from safe sources ✅Dispose of refuse properly in waste disposal sites Public health advisory⬇️ 🔗https://ncdc.gov.ng/news/513/stop-cholera%3A-public-health-advisory

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Our weekly #cholera situation report for week 27 has been uploaded. The report provides an update on the current #cholera epidemiological situation in Nigeria and our response activities. 🔗 Download via: https://ncdc.gov.ng/diseases/sitreps/?cat=7&name=An%20update%20of%20Cholera%20outbreak%20in%20Nigeria

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Our #cholera situation reports are now weekly. The reports provide an update on the #cholera epidemiological situation in Nigeria and our response activities. 🔗 Download via: https://ncdc.gov.ng/diseases/sitreps/?cat=7&name=An%20update%20of%20Cholera%20outbreak%20in%20Nigeria

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The bacteria, Vibrio cholerae, that causes #cholera is commonly found in contaminated water and food. Protect yourself. Read our public health advisory on measures to take to prevent yourself from getting infected. ⬇️ 🔗 https://ncdc.gov.ng/news/513/stop-cholera%3A-public-health-advisory

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#Cholera Situation Report Our monthly Cholera Situation Report for May 2024 has been published on our website. 🔗You can download, read and share via https://ncdc.gov.ng/diseases/sitreps/?cat=7&name=An%20update%20of%20Cholera%20outbreak%20in%20Nigeria

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Unwashed hands, untreated water, and uncovered food are some of the ways #Cholera germs are spread. Personal and environmental hygiene remains one of the best ways to STOP #Cholera. Watch this little boy's story on cholera: https://www.youtube.com/watch?v=jG1VNSCsP5Q

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