Ранее я делал серию постов про битовые операторы.
Вот вам ещё один наглядный пример как это используется в Python в модуле re.
Чтобы указать флаг для компилятора нам надо указать его после передаваемой строки. Например, добавляем флаг для игнорирования переноса строки.
pattern = re.compile(r"(\w+)+")
words = pattern.search(text, re.DOTALL)
А как указать несколько флагов? Ведь явно будут ситуации когда нам потребуется больше одного. Кто читал посты по битовые операторы уже понял как.
pattern.search(text, re.DOTALL | re.VERBOSE)
А теперь смотрим исходники, что находится в этих атрибутах?
Не удивительно, степени двойки. Почему? Потому что каждое следующее значение это сдвиг единицы влево.
>>> for n in [1, 2, 4, 8, 16, 32, 64, 128, 256]:
>>>
print(bin(n))
0b1
0b10
0b100
0b1000
0b10000
0b100000
0b1000000
0b10000000
0b100000000
Чтобы было понятней, давайте напишем тоже самое но иначе, добавим ведущие нули:
000000001
000000010
000000100
000001000
000010000
000100000
001000000
010000000
100000000
Не понятно что тут происходит? Читай три поста про битовые операторы начиная с этого ➡️https://t.me/pythonotes/45
В общем, это пример применения побитовых операций в самом Python.
Теперь вы знаете Python еще немного лучше)
#tricks#regex#libs
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Our latest Lassa Fever Situation Report has been published on our website (week 23).
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Our latest Lassa Fever Situation Report has been published on our website (week 6).
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Our latest Lassa Fever Situation Report has been published on our website (week 2).
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Our latest Lassa Fever Situation Report has been published on our website (week 49).
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In total for 2024, 1035 confirmed cases of #LassaFever have been recorded across 28 States in Nigeria.
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In total for 2024, 1018 confirmed cases and 172 deaths of #LassaFever have been recorded across 28 States in Nigeria.
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In total for 2024, 1005 confirmed cases of #LassaFever have been recorded across 28 States in Nigeria.
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In this week's #LassaFever situation report, we provide a summary of the epidemiological situation and response activities in Nigeria.
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In this week's #LassaFever situation report, we provide a summary of the epidemiological situation and response activities in Nigeria.
🔗Download, read, and share via
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