英文:
Passing arguments to subprocess.run from list
问题
以下是要翻译的内容：
我想将参数传递给一个 rsync 子进程，参数来自一个列表（或字符串），但我找不到任何方法可以在不指定每个列表项的情况下执行此操作。也就是说，这段代码可以工作：
args = ['--progress', '-avh']
subprocess.run(['rsync', args[0], args[1], loaded_prefs['src_dir'], loaded_prefs['dst_dir']])
但这段代码不起作用：
args = '--progress -avh'
subprocess.run(['rsync', args, loaded_prefs['src_dir'], loaded_prefs['dst_dir']])
或者这段代码也不行：
args = ['--progress', '-avh']
subprocess.run(['rsync', ','.join(args), loaded_prefs['dst_dir']])
任何帮助将不胜感激。
英文:
I want to pass arguments to an rsync subprocess from a list (or string) but can't find any way to do it without specifying each list item. ie this works
args = ['--progress', '-avh']
subprocess.run(['rsync', args[0],args[1],loaded_prefs['src_dir'],loaded_prefs['dst_dir']])
but this doesn't
args = '--progress -avh'
subprocess.run(['rsync', args,loaded_prefs['src_dir'],loaded_prefs['dst_dir']])
or this
args = ['--progress', '-avh']
subprocess.run(['rsync', ','.join(args),loaded_prefs['dst_dir']])
Any help would be much appreciated
答案1
得分: 3
--progress 和 -avh 需要分别作为传递给 subprocess.run() 的列表元素。不要将它们合并成单个字符串。保持为列表，然后用 * 展开该列表。
args = ['--progress', '-avh']
subprocess.run(['rsync', *args, loaded_prefs['src_dir'], loaded_prefs['dst_dir']])
英文:
--progress and -avh need to be separate elements of the list you pass to subprocess.run(). You're combining them into a single string. Keep it as a list, and then spread the list with *.
args = ['--progress', '-avh']
subprocess.run(['rsync', *args,loaded_prefs['src_dir'],loaded_prefs['dst_dir']])
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