Ранее я уже упоминал о другой фишке из ˍˍfutureˍˍ , это оператор деления.
from __future__ import division
Суть проста. Раньше сложность типа данных результата поределялась типом самого сложного операнда.
Например:
int/int => int
int/float => float
В первом случае оба операнда int, значит и результат будет int. Во втором float более сложный тип, поэтому результат будет float.
Если нам требуется получить дробное значение при делении двух int то приходилось форсированно один из операндов конверировать в float.
12/float(5) => float
Но с новой "философией" это не требуется. В Python3 "floor division" заменили на "true division" а старый способ теперь работает через оператор "//".
>>> 3/2
1.5
>>> 3//2
1
То есть теперь деление int на int даёт float если результат не целое число.
В классах теперь доступны методы __floordiv__() и __truediv__() для определения поведения с этими операторами.
Данный переход описан в PEP238.
#pep#2to3#basic
The average lifespan of a goldfish (Carassius auratus) is 10-15 years, with some varieties living into their thirties when properly cared for.
However, one male goldfish named Tish (1956-1999) lived to the remarkable age of 43, making him the world’s oldest goldfish ever.
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Male llamas grow sharp canines called ‘fighting teeth’ that they use to show who's boss and settle disputes with other males. @googlefactss#Llamas#AnimalFacts#Nature🦙🦷
Cats have three types of color-detecting cones, just like humans, but see colors less vividly. They perceive blues and greens well, but reds and pinks may appear grayish. Their vision excels at detecting subtle movement, especially in dim light. 🔵🟢🌙
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[See here]
@googlefactss#CatVision#AnimalFacts#Science
Beavers build dams to protect themselves from predators like bears and wolves. They live in lodges, not in the dam itself, on deep ponds made by the dams. These lodges have underwater entrances, so beavers can safely enter and leave without being seen. The pond keeps land animals away and the lodge is a dry home and food storage. 🦫🌊🌿@googlefactss#Beavers#Wildlife#Nature#AnimalFacts
Llamas spit to protect themselves, keep their place, or show power. Males spit in fights over females. Females spit to stop males. They also spit when annoyed or mistreated. Llama spit has saliva and partly digested food. It can fly up to 10 meters (33 feet). 🦙💨
[Source]
@googlefactss#Llamas#AnimalFacts#Spitting
Penguins have several group names. A group in water is called a “raft.” On land, it is called a “waddle.” A large group of penguins living or breeding together is called a “colony.” The place where they gather to breed is also called a “rookery.”
🐧🌊🏝️🐣
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#Penguins#AnimalFacts#Wildlife#DidYouKnow
Elephants can “listen” with their feet. Their foot pads have special nerve receptors that detect ground vibrations, including very low-frequency infrasound. Vibrations from other elephants’ rumbles or footsteps travel through the ground. Signals move through their bodies to the brain. Vibrations can also reach the inner ear through bone conduction. This helps elephants communicate over long distances and sense distant movement.
🐘🌍👣🔊
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Hippos secrete red oily "blood sweat" that protects their skin from sun and germs. It keeps their skin moist and healthy.
🦛☀️
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#Hippos#AnimalFacts#Nature#Wildlife#SunProtection
🐾 Capybaras are the world's largest rodents — social, semi-aquatic animals that live in groups in South America. They're so calm that other animals often sit on them, and they can even sleep underwater! 🌊
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@googlefactss#Capybara#AnimalFacts#Nature#Rodents#Wildlife
Whale sharks have tiny teeth covering their eyeballs. 🦈👁️
These "dermal denticles" act like protective armor for their protruding, lidless eyes.
[Source]
@googlefactss#AnimalFacts#Sharks#MarineBiology#NatureIsWild
Snow leopards are sometimes seen biting or holding their own tails. Scientists think they may do this to stay warm in cold mountain habitats or to play. A snow leopard’s long, thick tail also helps it balance on steep rocky cliffs and can wrap around its body like a blanket.
🐆❄️🐾
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#snowleopard#animalfacts#wildlife#naturefacts#bigcats#didyouknow