TGINSIGHT SIMILAR POSTS
Изворен канал @pythonotes · Post #241 · 5 мај
Можно ли в Python создавать бинарные файлы? Конечно можно. Для этого в Python есть следующие инструменты: ▫️ тип данных bytes и bytearray ▫️ открытие файла в режиме wb (write binary) или rb (read binary) ▫️ модуль struct Про модуль struct поговорим в первую очередь. Файл в формате JSON или Yaml внутри себя содержит разметку данных. Всегда можно определить где список начался а где закончился. Где записана строка а где словарь. То есть формат записи данных содержит в себе элементы разметки данных. В binary-файле данные не имеют визуальной разметки. Это просто байты, записанные один за другим. Правила записи и чтения находятся вне файла. Модуль struct как раз и помогает с организацией данных в таком файле с помощью определения форматов записи для разных частей файла. Модуль struct преобразует Python-объекты в массив байт, готовый к записи в файл и имеющий определённый вид. Для этого всегда следует указывать формат преобразования (или, как оно здесь называется - запаковки). Формат нужен для того, чтобы выделить достаточное количество байт для записи конкретного типа объекта. В последствии с помощью того же формата будет производиться чтение. При этом следует помнить что мы говорим о типах языка С а не Python. Именно формат определяет, что записано в конкретном месте файла, число, строка или что-то еще. Вот какие токены формата у нас есть. Помимо этого, первым символом можно указать порядок байтов. На разных системах одни и те же типы данных могут записываться по-разному, поэтому желательно указать конкретный способ из доступных. Если этого не сделать, то используется символ '@', то есть нативный для текущей системы. В строке формата мы пишем в каком порядке и какие типы собираемся преобразовать в байты. Запакуем в байты простое число, токен "i". >>> import struct >>> struct.pack('=i', 10) b'\n\x00\x00\x00' Теперь несколько float, при этом нужно передавать элементы не массивом а последовательностью аргументов. >>> struct.pack('=fff', 1.0, 2.5, 4.1) b'\x00\x00\x80?\x00\x00 @33\x83@' Вместо нескольких токенов можно просто указать нужное количество элементов перед одним токеном, результат будет тот же. >>> struct.pack('=3f', 1.0, 2.5, 4.1) b'\x00\x00\x80?\x00\x00 @33\x83@' Теперь запакуем разные типы >>> data = struct.pack('=fiQ', 1.0, 4, 100500) я запаковал типы float, int и unsigned long long (очень большой int, на 8 байт) b'\x00\x00\x80?\x04\x00\x00...' Распаковка происходит аналогично, но нужно указать тот же формат, который использовался при запаковке. Результат возвращается всегда в виде кортежа. >>> struct.unpack('=fiQ', data) (1.0, 4, 100500) Как видите, ничего страшного! #lib#basic
Пребарај: #financialfreedom
@talks · Post #295 · 19.06.2018 г., 04:10
"Satoshi Nakamoto is a modern day Prometheus who stole fire from gods and gave it to men. Unlike Prometheus, he was smart enough to disappear." Andreas M. Antonopoulos #Bitcoin#FinancialFreedom
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@tether · Post #193 · 24.11.2022 г., 14:53
#Tether is a proud sponsor of the African Bitcoin Conference #Bitcoin is for long-term saving, #Tether is for spending and short-term hedging against weak national fiat currencies #FinancialFreedom#USDT 👉https://www.afrobitcoin.org/
@realbinaryoptionss · Post #9210 · 10.04.2026 г., 13:13
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@realbinaryoptionss · Post #8883 · 19.02.2026 г., 09:06
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@husnullinartur · Post #722 · 20.10.2025 г., 20:18
Печатай не деньги, а книги. Потому что знания — это актив, который растёт даже в медвежьем рынке. 💡 Каждый прочитанный абзац — это новый токен в твоём личном капитале. Образование — это самая мощная инвестиция с неограниченным ROI. #CryptoMindset#InvestInYourself#PrintBooksNotMoney#FinancialFreedom
@fxeatrader2023 · Post #293 · 19.09.2023 г., 19:06
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@scrept_kids2 · Post #15 · 03.04.2026 г., 17:25
በጣም በሰፊው እና በደስታ የምጋለጠው አዲስ የዕድገት ስትራቴጂዬ! እውነተኛ የሀብት ፍጥረት እና የቀጣይነት ያለው እድገት የሚገኘው ዛሬ በሚዘራው የ"ዲሲፕሊን" ኢኮሲስተም ውስጥ እንጂ በሌላ ቦታ አይደለም። ይህ ማለት ብቻ ላይ የሚታገለው ጥንካሬ ሳይሆን፣ የራሳችንን የእውቀት ፖርትፎሊዮ በየቀኑ ማሳደግን (Upskilling)፣ የሀብት አያያዝን በጣም ትክክለኛ ለማድረግ (Financial Optimization) እና ለቴክኖሎጂ እንዲሁም ለፋይናንስ ደህንነት ትልቅ ስትራቴጂካዊ ትኩረት መስጠትን የሚጠይቅ ነው። ትልቁ ስኬት የሚጀምረው በትንሽ ጅማሮ ቢሆንም፣ በዚህ የጉዞ ሂደት ውስጥ የሚገጥሙን ተግዳሮቶች እንደ ዋጋ ያላቸው የትምህርት እድሎች በመቀበል እና ሳይታከቱ በፍጥነት ጉዞውን በመቀጠል፣ ነገን ከዛሬው የተሻለ፣ ደህንነቱ የተጠበቀ እና ውጤታማ ለማድረግ ዝግጁ ነን! #GrowthMindset#FinancialFreedom#TechSecurity#Leadership#SuccessJourney
@ss7trader · Post #29968 · 27.02.2026 г., 12:09
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@ss7trader · Post #29900 · 23.02.2026 г., 20:13
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@ss7trader · Post #29868 · 20.02.2026 г., 00:03
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@ss7trader · Post #29845 · 18.02.2026 г., 22:05
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@ss7trader · Post #29812 · 16.02.2026 г., 20:10
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