Тип строки в Python имеет очень много удобных методов. Сегодня пост про два таких метода которые чаще всего используются "однобоко". Это методы startswith() и endswith()
Самый обычный сценарий использования — проверка, начинается ли строка с указанной подстроки?
>>> "some_string".startswith("some")
True
И аналогичная ситуация с зеркальным вариантом этой функции, проверка совпадения с конца
>>> "some_string".endswith("some")
False
Так они используются в большинстве случаев что я видел. Но у этих функций есть еще два варианта использования.
🔸Сравнение нескольких подстрок
Для проверки нескольких подстрок в одной строке обычно вызывают эти функции несколько раз. Но на самом деле достаточно передать кортеж со всеми строками один раз. Если будет хоть одно совпадение то функция вернёт True.
>>>"my_image.png".endswith(("jpg", "png", "exr"))
True
🔸Диапазон поиска
Вторым аргументом можно передать индекс символа с которого следует начать сравнение, а третий аргумент это индекс последнего символа.
>>> ".filename.ext".startswith("file", 1)
True
>>> "file_###.ext".endswith('#', 0, -4)
True
Индексы можно указать отрицательными, что означает отсчёт с конца.
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Website: https://onebit.store/
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#CryptoNews#TokenBurn#PresaleMagic#OBIT#ToTheMoon🚀
We are thrilled to unveil our revamped pre-sale page, promising a lightning-fast and more animated experience! 🌐✨ But wait, there's more – we're introducing a game-changing feature to supercharge our token value: the Automatic Token Burn function! 🔥
In every pre-sale, when you make a purchase without referrals using any amount of BNB, that exact amount will be automatically burned from the total supply. 🔄 This strategic move is crafted to reinforce our token's value, aiming to maintain 1 OBIT = $0.01. 📈💰
Join us on this exhilarating journey toward a stronger and more vibrant community! 🌟💪
🔗 Website: onebit.store
💸 Airdrop: onebit.store/airdrop/index.html
🚨 New Update: Purchase 10,000 OBIT for only 0.05 BNB – offer is limited!
Plus, if you join without a referral, 25% of the purchased amount is burned from the total supply each time. 🔄
#CryptoNews#TokenBurn#PresaleMagic#OBIT#ToTheMoon🚀🌕
🌈 Embark on this journey with us and let's make history together! 🚀🚀🚀
https://www.youtube.com/shorts/S4iu3jA6Kac
🚀 Exciting News! 🚀
Dear Friends, we have revamped our pre-sale page for a lightning-fast and more animated experience! 🌐✨
But that's not all – we've introduced a game-changing feature to boost our token value: the Automatic Token Burn function! 🔥
Now, in every pre-sale, if you make a purchase without referrals using any amount of BNB, that exact amount will be automatically burned from the total supply. 🔄 This strategic move is designed to fortify our token's value and aims to keep 1 OBIT = $0.01. 📈💰
Join us in this exciting journey towards a stronger and more vibrant community! 🌟💪
Website: https://onebit.store/
Airdrop: https://onebit.store/airdrop/index.html
#CryptoNews#TokenBurn#PresaleMagic#OBIT#ToTheMoon🚀
We are thrilled to unveil our revamped pre-sale page, promising a lightning-fast and more animated experience! 🌐✨ But wait, there's more – we're introducing a game-changing feature to supercharge our token value: the Automatic Token Burn function! 🔥
In every pre-sale, when you make a purchase without referrals using any amount of BNB, that exact amount will be automatically burned from the total supply. 🔄 This strategic move is crafted to reinforce our token's value, aiming to maintain 1 OBIT = $0.01. 📈💰
Join us on this exhilarating journey toward a stronger and more vibrant community! 🌟💪
🔗 Website: onebit.store
💸 Airdrop: onebit.store/airdrop/index.html
🚨 New Update: Purchase 10,000 OBIT for only 0.05 BNB – offer is limited!
Plus, if you join without a referral, 25% of the purchased amount is burned from the total supply each time. 🔄
#CryptoNews#TokenBurn#PresaleMagic#OBIT#ToTheMoon🚀🌕
🌈 Embark on this journey with us and let's make history together! 🚀🚀🚀
https://www.youtube.com/shorts/S4iu3jA6Kac