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
📰New UI for Calls
The only change that can be seen in the first release of the 10.5.0 beta version for Android is the Updated Telegram Calls interface.
Although its interface has been updated, some items are still not added in the calls (for example, Rate the Call or Choose the Speaker)
#Calls | #Beta v10.5
👉The TG Times
https://developers.facebook.com/docs/facebook-login/access-tokens#apptokens
When someone connects with an app using #Facebook Login, the app will be able to obtain an access token which provides temporary, secure access to Facebook APIs.
An access #token is an opaque string that identifies a user, app, or Page and can be used by the app to make graph API #calls. Access tokens are obtained via a number of methods, each of which are covered later in this document. The token includes information about when the token will expire and which app generated the token. Because of privacy checks, the majority of #API calls on Facebook need to include an access token.
Channel: SMS Activation Updates
Members: ~5.32K
💢 Username: @virtualnumbersforverification
Description:
Your source for news and updates on virtual numbers for SMS and Calls. Keep up with trends and get exclusive offers from PrivatePhoneBot.
🏷 Tags: #other
#virtual_numbers#sms#calls#voip#sms_activation
https://telegramchannels.me/channels/virtualnumbersforverification
https://docs.python.org/3/library/asyncio-eventloop.html
#Calls
Most #asyncio functions don’t accept keywords. If you want to pass #keywords to your callback, use #functools.partial(). For example, #loop.#call_soon(functools.partial(print, "Hello", flush=True)) will call print("Hello", flush=True).
#Note
functools.partial() is better than lambda functions, because asyncio can inspect functools.partial() object to display parameters in debug mode, whereas lambda functions have a poor representation.
BaseEventLoop.call_soon(callback, *args)
Arrange for a callback to be called as soon as possible. The callback is called after call_soon() returns, when control returns to the event loop.
This operates as a FIFO queue, callbacks are called in the order in which they are registered. Each callback will be called exactly once.
Any positional arguments after the callback will be passed to the callback when it is called.
An instance of asyncio.Handle is returned, which can be used to cancel the callback.
Use functools.partial to pass keywords to the callback.
BaseEventLoop.call_soon_threadsafe(callback, *args)
Like call_soon(), but thread safe.
See the concurrency and multithreading section of the documentation.