特定的参数导致argument解析不正确地解析参数。

Question

到目前为止，我在一个运行良好的脚本中使用pythonarg解译。但是，将特定的文件路径作为参数传递会导致解析器失败。

以下是我的Here解析设置：

parser = argparse.ArgumentParser(prog="writeup_converter.py", description="Takes a folder of Obsidian markdown files and copies them across to a new location, automatically copying any attachments. Options available include converting to a new set of Markdown files, removing and adding prefixes to attachments, and converting for use on a website")

#positional arguments
parser.add_argument("source_folder", help="The folder of markdown files to copy from.")
parser.add_argument("source_attachments", help="The attachments folder in your Obsidian Vault that holds attachments in the notes.")
parser.add_argument("target_folder", help="The place to drop your converted markdown files")
parser.add_argument("target_attachments", help="The place to drop your converted attachments. Must be set as your attachments folder in Obsidian (or just drop them in the root of your vault if you hate yourself)")

#optional flags
parser.add_argument("-r", "--remove_prefix", help="Prefix to remove from all your attachment file paths.")
parser.add_argument("-v", "--verbose", action="store_true", help="Verbose mode. Gives details of which files are being copied. Disabled by default in case of large directories")
parser.add_argument("-w", "--website", help="Use website formatting when files are copied. Files combined into one markdown file with HTML elements, specify the name of this file after the flag")
parser.add_argument("-l", "--asset_rel_path", help="Relative path for site assets e.g. /assets/images/blogs/..., include this or full system path will be added to links")

print(sys.argv)
exit()

#parse arguments
args = parser.parse_args()

我为调试目的添加了print和exit。以前，当我使用此配置运行程序时，它运行得很好--但是这组参数会产生一个奇怪的错误：

PS D:\OneDrive\Documents\writeup-converter> python .\writeup_converter.py -v -r Cybersecurity "..\Personal-Vault\Cybersecurity\SESH\2021-22 Sessions\Shells Session Writeups\" "..\Personal-Vault\Attachments\" "..\Cybersecurity-Notes\Writeups\SESH\DVWA\" "..\Cybersecurity-Notes\Attachments\"
usage: writeup_converter.py [-h] [-r REMOVE_PREFIX] [-v] [-w WEBSITE] [-l ASSET_REL_PATH] source_folder source_attachments target_folder target_attachments
writeup_converter.py: error: the following arguments are required: source_attachments, target_folder, target_attachments

它似乎没有认识到肯定存在的位置论点。我添加了这些调试语句，以查看参数的状态是否符合Python：

['.\\writeup_converter.py', '-v', '-r', 'Cybersecurity', '..\\Personal-Vault\\Cybersecurity\\SESH\\2021-22 Sessions\\Shells Session Writeups" ..\\Personal-Vault\\Attachments\\ ..\\Cybersecurity-Notes\\Writeups\\SESH\\DVWA\\ ..\\Cybersecurity-Notes\\Attachments\\']

正如您所看到的，这四个位置参数已经合并为一个。通过进一步的实验，我发现第一个论点具体导致了这个问题：

PS D:\OneDrive\Documents\writeup-converter> python .\writeup_converter.py a b c d
['.\\writeup_converter.py', 'a', 'b', 'c', 'd']
PS D:\OneDrive\Documents\writeup-converter> python .\writeup_converter.py "a b" b c d
['.\\writeup_converter.py', 'a b', 'b', 'c', 'd']
PS D:\OneDrive\Documents\writeup-converter> python .\writeup_converter.py "a\ b" b c d
['.\\writeup_converter.py', 'a\\ b', 'b', 'c', 'd']
PS D:\OneDrive\Documents\writeup-converter> python .\writeup_converter.py "a\ b" "b" c d
['.\\writeup_converter.py', 'a\\ b', 'b', 'c', 'd']
PS D:\OneDrive\Documents\writeup-converter> python .\writeup_converter.py "..\Personal-Vault\Cybersecurity\SESH\2021-22 Sessions\Shells Session Writeups\" "b" c d
['.\\writeup_converter.py', '..\\Personal-Vault\\Cybersecurity\\SESH\\2021-22 Sessions\\Shells Session Writeups" b c d']

如您所见，在使用字符串"..\Personal-Vault\Cybersecurity\SESH\2021-22 Sessions\Shells Session Writeups\"之前，将正确地解析参数。我想不出原因，所以任何想法都会很感激。这种行为发生在Python和CMD中。

Answer 1

在发布这篇文章的大约10秒后，我意识到了这个错误，这要归功于堆栈溢出语法的突出显示--路径中的反斜杠是在转义引号。对此进行转义，将导致this解析的行为正确：

PS D:\OneDrive\Documents\writeup-converter> python .\writeup_converter.py -v -r Cybersecurity "..\Personal-Vault\Cybersecurity\SESH\2021-22 Sessions\Shells Session Writeups\\" ..\Personal-Vault\Attachments\ ..\Cybersecurity-Notes\Writeups\SESH\DVWA\ ..\Cybersecurity-Notes\Attachments\
['.\\writeup_converter.py', '-v', '-r', 'Cybersecurity', '..\\Personal-Vault\\Cybersecurity\\SESH\\2021-22 Sessions\\Shells Session Writeups\\', '..\\Personal-Vault\\Attachments\\', '..\\Cybersecurity-Notes\\Writeups\\SESH\\DVWA\\', '..\\Cybersecurity-Notes\\Attachments\\']