Функция sub в regex может принимать функцию в качестве аргумента repl.
📄 Из документации:
If repl is a function, it is called for every non-overlapping occurrence of pattern. The function takes a single match object argument, and returns the replacement string.
То есть для каждого совпадения будет вызвана функция для вычисления замены вместо замены на одну и ту же строку для всех совпадений.
Иными словами, для замены разных совпадений на разные строки не потребуется запускать re.sub() много раз для каждой строки замены. Достаточно определить функцию, которая вернёт строку для каждого из совпадений.
Описание слишком запутанное🤔, давайте лучше рассмотрим на простом примере:
Создаем карту замены. То есть какие строки на какие требуется менять.
remap = {
'раз': '1',
'два': '2',
'три': '3',
'четыре': '4',
'пять': '5',
}
Пишем функцию поиска строки для замены. Единственным аргументом будет объект re.Match.
Используя данные этого объекта мы вычисляем замену on-the-fly!
def get_str(match: re.Match):
word = match.group(1)
return remap.get(word.lower()) or word
Пример текста.
text = '''Раз Два Три Четыре Пять
Вместе будем мы считать
Пять Четыре Три Два Раз
Мы считать научим вас
'''
Теперь запускаем re.sub и вместо строки замены (repl) подаём имя функции.
(Данный паттерн ищет отдельные слова в тексте)
>>> print(re.sub(r'(\w+)', get_str, text))
1 2 3 4 5
Вместе будем мы считать
5 4 3 2 1
Мы считать научим вас
Думаю, достаточно наглядно 🤓
#libs#regex
#Web3Festival in Hong Kong wrapped up during a tough week for the crypto market, but builder momentum was high and the community remains active 🔥
Announcements such as TON Blockchain's TON wallet expanding into the U.S. and events hosted by Monad and BNB Chain indicate that the space is still moving forward.
For a recap on highlights from this past week, read the DWF Ventures team's summary here.
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#Web3Festival was a successful week, and we especially enjoyed our side event, DWF Labs Haus, on Sunday night. 🌙
It was an evening of delicious cocktails and canapés, fantastic company, and insightful conversations. Thank you to everyone who came!
During #Web3Festival Hong Kong, our team was able to share insights about innovations that are heating up in the crypto space. 🔥
Yesterday, Fiona Ma, Senior Associate at DWF Ventures, gave a speech about decoding the Ethereum restaking landscape, delving into the evolution from staking to restaking.
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Our team had an amazing time at #Web3Festival in Hong Kong!
It was our second year sponsoring Web3 Festival, and this year was even bigger and better than the last. 🔥
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About last night... 👀
That's a wrap on our event, DWF Labs Haus, during #Web3Festival Hong Kong. 🔥
Meeting industry leaders, founders, and innovators in person is always a pleasure as we continue to work from a diverse network of cities and countries worldwide.
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Setting up for our DWF Labs Haus event during #Web3Festival, which kicks off at 6 PM. 👀
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