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
Major Updates on Bitcoin and Ethereum
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🔗 David Sacks confirmed evaluating a *national Bitcoin reserve* is a priority for Trump's Digital Assets Task Force. BTC is touted a *superior store of value*. Regulations on crypto incoming within six months!
🔗 XRP Ledger briefly halted due to validation issues but self-healed. More info: Coindesk.
🔗 Hong Kong weighs *Bitcoin as a strategic reserve*, urging to accelerate feasibility studies. Insights here: Wu Blockchain News.
🔗 Ethereum's *supply rises* back to pre-merge levels due to Dencun upgrade, signaling inflation. More: The Block.
🔗 U.S. to consider Bitcoin reserve as an essential economic security asset; institutional adoption underway!
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In other news, TON DeFi lender EVAA Protocol raised $2.5 million in a private token sale. 🤝 Meanwhile, Massachusetts Senator Peter Durant introduced legislation for a Strategic #Bitcoin Reserve. 💼
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For more details:
- Ramaswamy's Candidacy
- EVAA Protocol Fundraiser
- Crypto VC Investment Data
- Coinbase's Support for Bitcoin Reserve
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#Bitcoin#crypto#Trumpr#US#Blockchain#Finance#Regulation#Assets#DigitalCurrency#Investments#Savings#Market#Trading#Reserves#Government#FTX#Securities#FortKnox#Economy#PriceDrop#StrategicReserve
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