Как разделить строку с shell-командой на отдельные аргументы в виде списка?
Если сделать просто сплит по пробелу то получим то что надо, кроме случаев со вставками текста с пробелами. Например так:
>>> '-arg "I Am Groot"'.split(' ')
['-arg', '"I', 'Am', 'Groot"']
Чтобы учитывать текст в кавычках как единый аргумент можно воспользоваться функцией shlex.split()
Кто читает мой канал давно, уже в курсе.
А что делать, если нужно обратное действие? Объединить аргументы из списка в строку и при этом добавить кавычки в аргумент с пробелами.
Конечно, если вы используете subprocess то он сам всё разрулит. Но если вам нужна именно команда одной строкой, то можно воспользоваться готовой функцией в том же subprocess.
>>> from subprocess import list2cmdline
>>> list2cmdline(['-arg', 'I Am Groot'])
'-arg "I Am Groot"'
Он также позаботится об экранировании уже имеющихся кавычек
>>> list2cmdline(['-arg', 'I Am "Groot"'])
'-arg "I Am \"Groot\""'
А вот так он может "схлопнуть" в команду JSON
>>> list2cmdline(['--json', json.dumps({'key': 'value'})])
'--json "{\"key\": \"value\"}"'
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Возможно кто-то спросит, а зачем соединять аргументы в строку если subprocess сам это сделает а os.system не наш путь?
Мне как-то потребовалось отправлять команду на удалённое выполнение и в API поддерживалось указание команды только строкой. Так что всякое бывает)
#libs#basic
Really Good One to Watch
The daughter takes a step forward with each question.
The father stands there. The daughter, who starts off playfully laughing.... is shocked to see her father standing there despite her progress.
When the father steps forward for the final question, she hugs him. Father - Daughter ❤️
Children can be raised without knowing hardship.
But it is important to make them know that nothing they get comes so easily ❤️
#Inspiring
@InspiringThoughts
Really Good One to Watch
The daughter takes a step forward with each question.
The father stands there. The daughter, who starts off playfully laughing.... is shocked to see her father standing there despite her progress.
When the father steps forward for the final question, she hugs him. Father - Daughter ❤️
Children can be raised without knowing hardship.
But it is important to make them know that nothing they get comes so easily ❤️
#Inspiring
@InspiringThoughts
Really Good One to Watch
The daughter takes a step forward with each question.
The father stands there. The daughter, who starts off playfully laughing.... is shocked to see her father standing there despite her progress.
When the father steps forward for the final question, she hugs him. Father - Daughter ❤️
Children can be raised without knowing hardship.
But it is important to make them know that nothing they get comes so easily ❤️
#Inspiring
@InspiringThoughts
Really Good One to Watch
The daughter takes a step forward with each question.
The father stands there. The daughter, who starts off playfully laughing.... is shocked to see her father standing there despite her progress.
When the father steps forward for the final question, she hugs him. Father - Daughter ❤️
Children can be raised without knowing hardship.
But it is important to make them know that nothing they get comes so easily ❤️
#Inspiring
@InspiringThoughts
Really Good One to Watch
The daughter takes a step forward with each question.
The father stands there. The daughter, who starts off playfully laughing.... is shocked to see her father standing there despite her progress.
When the father steps forward for the final question, she hugs him. Father - Daughter ❤️
Children can be raised without knowing hardship.
But it is important to make them know that nothing they get comes so easily ❤️
#Inspiring
@InspiringThoughts