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Изворен канал @pythonotes · Post #411 · 9 фев.

reload_flag="" if [[ -n "${DEBUG}" ]]; then reload_flag="--reload" fi if [[ -n "${WORKER_COUNT}" ]]; then workers=${WORKER_COUNT} else workers=2 fi gunicorn --workers ${workers} \ --bind 0.0.0.0:8000 \ ${reload_flag} main.wsgi Писали такие конструкции чтобы проверить наличие флага и сформировать команду правильно? На самом деле можно сделать тоже самое проще. Для этого используются операторы условной подстановки, доступные в оболочках семейства POSIX. :- для установки значений по умолчанию ${WORKER_COUNT:-2} Если переменная не объявлена, то будет дефолтное значение 2. :+ подставляет указанный текст, если переменная не пуста ${DEBUG:+--reload} Если что-то есть в переменной то распечатается текст после символа +, в противном случае - ничего. Удобно для опциональных флагов, как в нашем примере. Итого наш скрипт может выглядеть так: gunicorn --workers ${WORKER_COUNT:-2} \ --bind 0.0.0.0:8000 \ ${DEBUG:+--reload} main.wsgi Есть еще два оператора. := не только подставить дефолтное значение, но и присвоить его переменной, если она пуста # никаких переменных еще нет VAL1=${VAL2:=hello} # теперь доступны обе echo $VAL1 $VAL2 # hello hello :? остановить выполнение с ошибкой, если переменной нет. echo ${MISS:?is required} bash: MISS: is required Код выхода будет 1. #tricks#linux

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Crypto M - Crypto News

@CryptoM · Post #64940 · 10.04.2026 г., 11:15

🚀 Perp DEX Market Sees Shift in Trading Volumes On April 10, data from DefiLlama indicates a decline in overall trading volumes in the on-chain Perp DEX market. According to BlockBeats, Aster's trading volume has surpassed that of EdgeX and Lighter, securing the second position. Meanwhile, the total holdings of the HIP-3 ecosystem projects TradeXYZ and Hyperliquid have seen a slight increase. The current rankings for major Perp DEX trading volumes are as follows: Hyperliquid has a 24-hour trading volume of approximately $8.23 billion, with open contract volumes around $7.46 billion. TradeXYZ records a 24-hour trading volume of about $3.02 billion, with open contract volumes near $1.74 billion. Aster shows a 24-hour trading volume of roughly $2.07 billion, with open contract volumes around $1.91 billion. Lighter has a 24-hour trading volume of approximately $1.90 billion, with open contract volumes about $706 million. EdgeX reports a 24-hour trading volume of around $1.84 billion, with open contract volumes near $1.05 billion. Pacifica's 24-hour trading volume is about $422 million, with open contract volumes approximately $79.34 million. #PerpDEX#DeFi#TradingVolume#Crypto#Blockchain#Aster#EdgeX#Lighter#Hyperliquid#TradeXYZ#HIP3#Pacifica#ASTER

Crypto M - Crypto News

@CryptoM · Post #64611 · 09.04.2026 г., 10:45

🚀 TradeXYZ Sees Decline After Surge in Trading Volume On April 9, according to BlockBeats, data from DefiLlama indicates that the trading volume of the HIP-3 ecosystem project TradeXYZ, which doubled the previous day, has now decreased. Hyperliquid's overall trading volume has also fallen below $10 billion, with 45.7% of its volume originating from TradeXYZ's traditional market. EdgeX ranks second in trading volume. The current rankings for major Perp DEX trading volumes are as follows: Hyperliquid: 24-hour trading volume is approximately $9.54 billion, with open contract volume around $7.25 billion. TradeXYZ: 24-hour trading volume is about $4.36 billion, with open contract volume around $1.69 billion. EdgeX: 24-hour trading volume is approximately $2.30 billion, with open contract volume around $1.03 billion. Aster: 24-hour trading volume is about $1.92 billion, with open contract volume around $1.87 billion. Lighter: 24-hour trading volume is approximately $1.82 billion, with open contract volume around $688 million. Pacifica: 24-hour trading volume is about $471 million, with open contract volume around $77.24 million. #TradeXYZ#DefiLlama#Hyperliquid#PerpDEX#CryptoTrading#EdgeX#Aster#Lighter#Pacifica#TradingVolume#CryptoMarket