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
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🌎 In physics, the concept of a "multiverse" proposes that our universe could be just one of many coexisting universes, each with different physical laws. This idea arises in cosmic inflation theory, where rapid early expansion could have created countless separate "bubble universes." The multiverse hypothesis is explored by leading scientists but remains unproven, and no direct evidence has yet been observed. ✨
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🌎 The "string theory landscape" in physics proposes that more than 10^500 possible universes, each with different physical laws, could exist within higher-dimensional space. This idea stems from mathematical solutions to string theory equations, where our universe is just one possibility in a vast "multiverse" of parallel worlds. ✨
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🌎 Scientists exploring the mysteries of parallel worlds suggest that, according to quantum mechanics, alternate dimensions could exist alongside our own—each with its unique version of reality. Though unproven, this idea helps explain puzzling phenomena in physics and inspires everything from science fiction to cutting-edge research about the nature of our universe. ✨
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🌎 The "brane multiverse" is a scientific idea suggesting our universe might be a three-dimensional "brane" floating in higher-dimensional space. Some versions of string theory propose multiple branes could exist close together, and rare collisions might even trigger new big bangs. The concept arises from efforts to unify gravity with quantum physics. ✨
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🌎 Quantum physics allows for the concept of “superposition,” where particles exist in multiple states at once. This principle forms the basis for theories suggesting that parallel worlds or dimensions might exist alongside our own. The famous “double-slit experiment” demonstrates superposition, as particles act as if they travel through two paths simultaneously. ✨
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🌎 The concept of parallel worlds is grounded in the "many-worlds interpretation" of quantum mechanics, proposed by physicist Hugh Everett in 1957. It suggests every quantum event may split reality into new branches, creating countless coexisting universes. Unlike science fiction, this idea remains unproven and is debated among physicists, but it offers possible explanations for phenomena like quantum superposition. ✨
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