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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#LebanonUnderAttack
Genocidal Psychopaths of the Zionist Israeli terrorist army blow up the entire Lebanese bordering Village of Mhaybeeb this morning on October 16, 2024.
#LebanonUnderAttack
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#LebanonUnderAttack
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#LebanonUnderAttack
The Lebanese Ministry of Health's Emergency Operations Center reported that the death toll from the Israeli assault has climbed to 2,653, with 12,360 others wounded since October 8, 2023. This staggering rise reflects the continuous bombardment and escalating violence.
#Israel#Lebanon#LebanonUnderAttack
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#LebanonUnderAttack#Israel
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#LebanonUnderAttack
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#LebanonUnderAttack
#BeirutUnderAttack
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I will not share any videos or photos, as many of the women might be hijabis, and the footage shows them in heartbreaking scenes without their hijabs.
#LebanonUnderAttack
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#LebanonUnderAttack#WarCrimes#Beirut
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#Lebanon#PagersAttack#Hezbollah#LebanonUnderAttack
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#SouthLebanon#Khiam#LebanonUnderAttack#Israel