Многие из тех кто активно работал с Python2 несколько удивлены, почему в Python3 удобная функция reload() переехала из builtin в imp а потом и в importlib?
Ну было же удобно! А теперь лишний импорт😖
Дело в том, что начиная с Python3.3 функция reload() переписана на Python вместо Cи.
Что это нам даёт?
🔸 Такой код проще поддерживать и развивать
🔸 Python код легче читать, изучать и понимать.
Сравните это ➡️ и это ➡️.
🔸 Как результат пункта 2, проще писать свои расширения импорта. Например, пользовательский импортёр с какой-либо хитрой логикой по аналогии с импортом из zip архивов.
А есть ли у этого решения недостатки? Да, они всегда есть.
🔹 Так как это не builtin функция, её следует импортнуть перед использованием
🔹 Скорость замедлилась примерно на 5%. Очевидно, что это совершенно не критично. К тому же от версии к версии логика импорта будет оптимизироваться и ускоряться.
В самом начале файла importlib/__init__.py мы видим такой импорт:
import _imp # Just the builtin component, NOT the full Python module
То есть часть функционала по прежнему написана на Си, но достаточно низкоуровневая.
#basic
Chanel Tapper holds the Guinness World Record for the longest tongue — 3.8 in (9.75 cm) — and says she loves watching people shriek in disbelief. She can remove Jenga blocks, grab a lemon from a glass, flip plastic cups, lift a spoon by curling it, and touch her nose and chin with the tip.
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There is a naturally occurring metal called gallium that melts in your hand. It has a melting point of about 29.8°C (85.6°F), so just holding it makes it turn from a shiny solid into a silvery liquid. Gallium doesn’t react with air, so it can sit in your hand safely, but it can melt containers made of aluminum. Scientists use gallium in electronics, LED lights, and solar panels because of its unique properties.
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In Death Valley’s Racetrack Playa, large rocks, some weighing hundreds of kilograms, move across the dry lake bed, leaving long tracks behind. This happens when a rare set of conditions align. First, rain fills the lake bed with a shallow layer of water. At night, the water freezes into thin sheets of ice. As the sun warms the ground, the ice breaks into large, floating panels. Light winds then push the ice, slowly moving the rocks across the playa. The tracks left behind can last for decades, creating unique patterns. This natural process has been understood by scientists and is one of the most fascinating geological phenomena.
🪨❄️🌞
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There is a volcano in Indonesia called Kawah Ijen that glows bright blue at night. The blue glow comes from burning sulfur gases that ignite as they escape from the crater. Miners work in the area collecting solidified sulfur, even though the fumes are toxic. The effect makes the crater look like a surreal, electric-blue river flowing through the volcano, attracting photographers and adventurers from around the world.
🌋🔵🔥
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There is a place in the Sahara Desert called the Richat Structure, also known as the “Eye of the Sahara.” It is a giant circular formation nearly 50 kilometers wide, visible from space. Scientists believe it formed from erosion, exposing layers of rock in concentric rings. The structure is perfectly round, which makes it look like a massive bullseye in the desert. It has fascinated explorers and geologists for decades because of its unusual shape.
🎯🏜️🌍
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Mammatus clouds look like a sky full of hanging pouches or bubbles. Their name comes from the Latin word “mamma,” which means “breast,” because of their rounded, pouch-like shapes. These clouds often appear after thunderstorms and can be bright white, gray, or even orange during sunset. Despite their dramatic appearance, they are mostly harmless and form when cold air sinks into warmer air below, creating the pouch-like shapes.
☁️🌅🌩️
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Show your own mammatus cloud pictures, the one with the most likes gets added to the post. 😉
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