Заметка начинающим, которые часто сталкиваются с подобной непоняткой.
Ситуация следующая, есть список файлов:
names = [
'image.bmp',
'second.txt.bkp',
'data.db',
'.config.cfg',
'file.ext.bkp'
]
И мы хотим убрать у них окончание ".bkp".
Не знаю зачем, пример довольно надуманный) Но суть он показывает, а это главное.
Те, кто еще не очень знаком с библиотекой os.path или pathlib, вероятно решат обработать имена как строки. И тут вполне подойдет метод строки strip().
Что делает этот метод? Он отрезает указанные символы по обеим сторонам строки. Если ничего не указать, то убирает невидимые символы (пробелы, табуляции и переносы строк).
В нашем случае будет выглядеть вот так:
>>> name.strip('.bkp')
То есть просим удалить строку '.bkp' по краям имени файла, если таковая есть.
Можно применить аналогичный метод rstrip(), чтобы отрезать только справа, но для этого примера используем обычный.
>>> for name in names:
>>> print(name.strip('.bkp'))
image.bm
second.txt
data.d
config.cfg
file.ext
Хм, что-то не то с нашими именами! Что случилось??? Видим нежелательное переименование в именах, где и близко не было указанной строки '.bkp'
А дело всё в том, что данный метод ищет не указанную строку, а указанные символы, и не важно в каком порядке.
Для метода strip() строка '.bkp' это не паттерн для поискаа список символов. Потому он отрезал симовол 'p' от '.bmp' и удалил точку из файла '.config.cfg'.
Как тогда правильно заменить именно паттерн? Для начинающего можно посоветовать метод строки replace(), который как раз использует для замены указанную строку целиком. В нашем примере заменим её на пустую строку.
>>> for name in names:
>>> print(name.replace('.bkp', ''))
image.bmp
second.txt
data.db
.config.cfg
file.ext
Уже лучше, но помните, это лишь пример про strip(). Для работы с именами файлов есть способы и более "правильные", дающие однозначно верный результат. Я взял файлы только в качестве примера. Даже replase() тут может сделать не то что ожидаем.
Просто впредь будьте внимательны с этим strip().
#basic
☺️Farmix – Latest News Review and Upcoming AMA
Updates and changes:
➡️Increased RP for Lending in Farmix – in3⃣ The RP farm for providing liquidity in TON, USDT, NOT, stTON and tsTON, which can later be exchanged for protocol tokens, has been increased several times.
➡️ When closing a position, you can choose to convert LP into a credit token. At the moment, the function works in the $TON/$USDT pair and only for new positions. The update has fully prepared the team for the emergence of new highly liquid stablecoins with increased leverage up to 8x.
➡️Roadmap released
➡️ The formula for calculating the Estimate Profit indicator has been updated.
➡️ The #Farmix RP leaderboard in TMA has appeared.
🎙 The team announced an upcoming AMA session, where they will discuss the current results and plans of the project. The broadcast will take place on April 7 on the #Farmix Telegram channel at 19:00 UTC+3. You can ask questions through the form, and 3 participants with the most interesting questions will receive $USDT each.
📖 If you have any questions about the project, you can ask them in the chat. There is also a step-by-step text guide for opening a farm.
Farmix | Channel | Documentation
🙏TON Society just added SBT Points
For now not all SBTs have amount of points that their owners will receive, but a trend is already visible — the more valuable in terms of the number of points are #DeFi SBTs and for contributors to the blockchain.
If you want to earn more points you have you should definitely get these SBTs:
💎 8 more days to get🙏9,500 for two valuable SBT Farmix in the BroBot contest✋
💎12 days to get tBook SBT Late Night DeFi with general speed 🙏27,000 points.
#TON#BroBot#SBT#Farmix
😎–Hey Bro! $1,500 and free SBTs for you!
We’re launching a new quest with Farmix — leveraged lending liquidity protocol.
Prize pool: just gain 600 XP and hold Lending for a chance to win one of 150 $10 prizes, extra XP, and guaranteed #SBT from TON Society!
🚀Join the quest now and share with your Bros!
📖
Deadline: Dec. 27, 15.00 UTC
#TON#BroBot#contest#Farmix
🧑💻Review: Farmix – The Innovative Force in TON DeFi
☺️Farmix appeared relatively recently, it is a semi-finalist of #DoraHacks hackathon. In a nutshell, it is a marginal farming protocol that allows you to significantly increase the profitability of your farms by using leverage.
🪙 We have already tested their farming pools a couple of weeks ago, everything went well and without complications. At that time, the APR in the farms was very high, some pairs gave up to 9,000% APR. Below is a short guide for working with Farmix.
🐷 On average, #Farmix farms are 3-5 times higher than in #DEX pools. There are two options to earn income for providing your assets: Lending and Farms. We will look at the Farms option, because this is the most interesting:
🟡Log in to Farmix and connect your MTW wallet.
🟡 Go to the "Farmers" tab and find the pair you are interested in, for example we will use the STORM/TON pair.
🟡 First, select "Borrow asset" — this is the asset in which you will take a loan for leverage in the farm. In the case of the STORM/TON farm, only the TON loan asset is available.
🟡Enter in the $STORM/$TON fields how much STORM and TON you will provide as collateral. In #Farmix you can open a farm with one token, it is not necessary to provide both tokens, as the smart contract itself will convert the tokens into a 50/50 pair and form LP tokens.
🟡Select the leverage (Leverage slider) with which you want to open the farm. The higher the leverage, the higher the APR of the farm, but the liquidation risks also increase.
🟡Click Open position at the bottom, sign the transaction in the wallet and in a few minutes your first farm will be open.
⚠️Important: Please note that leverage is only provided for collateral in $TON , $USDT , $tsTON, $stTON, $NOT . Any position with leverage > 1 has its own health factor. HF > 1.3 is considered moderate, HF = 1 - the position is liquidated.
📊 At first glance, the guide may seem complicated, but everything is generally intuitive. If you have any questions about the work of the project, farms, etc., you can ask them 🔔in our chat. You will also receive RP points for staking and farming, more details in the "Reward activities" tab. And as usual #NFR#DYOR
Farmix | Channel | Project documentation