如何让Python使用包含冒号的路径?
我有一个包含嵌入式 Python 2.6 解释器的程序。当我调用解释器时,我调用 PySys_SetPath() 将解释器的导入路径设置为安装在包含 Python 脚本文件的可执行文件旁边的子目录...如下所示:(
PySys_SetPath("/path/to/my/program/scripts/type1:/path/to/my/program/scripts/type2");
除了路径字符串是根据我的程序可执行文件的当前位置,而不是像上面的示例那样硬编码)
这工作正常......除非聪明的用户决定将我的程序安装在名称中带有冒号的文件夹下。在这种情况下,我的 PySys_SetPath() 命令最终看起来像这样(注意存在名为“path:to”的文件夹):
PySys_SetPath("/path:to/my/program/scripts/type1:/path:to/my/program/scripts/type2");
...这会破坏我的所有 Python 脚本,因为现在 Python 在“/”中查找脚本文件path”和“to/my/program/scripts/type1”而不是“/path:to/myprogram/scripts/type1”,因此所有导入语句都不起作用。
我的问题是,除了告诉用户避免在文件夹名称中使用冒号之外,是否有任何解决方案可以解决此问题?
我查看了 Python/sysmodule.c 中的 makepathobject() 函数,它似乎不支持任何类型的引用或转义来处理文字冒号......但也许我错过了一些细微差别。
I have a program that includes an embedded Python 2.6 interpreter. When I invoke the interpreter, I call PySys_SetPath() to set the interpreter's import-path to the subdirectories installed next to my executable that contain my Python script files... like this:
PySys_SetPath("/path/to/my/program/scripts/type1:/path/to/my/program/scripts/type2");
(except that the path strings are dynamically generated based on the current location of my program's executable, not hard-coded as in the example above)
This works fine... except when the clever user decides to install my program underneath a folder that has a colon in its name. In that case, my PySys_SetPath() command ends up looking like this (note the presence of a folder named "path:to"):
PySys_SetPath("/path:to/my/program/scripts/type1:/path:to/my/program/scripts/type2");
... and this breaks all my Python scripts, because now Python looks for script files in "/path", and "to/my/program/scripts/type1" instead of in "/path:to/myprogram/scripts/type1", and so none of the import statements work.
My question is, is there any fix for this issue, other than telling the user to avoid colons in his folder names?
I looked at the makepathobject() function in Python/sysmodule.c, and it doesn't appear to support any kind of quoting or escaping to handle literal colons.... but maybe I am missing some nuance.
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您遇到的问题是
PySys_SetPath
函数使用冒号作为分隔符来解析您传递的字符串。该解析器将每个:
字符视为分隔路径,并且没有办法解决此问题(无法转义)。但是,您可以通过创建各个路径的列表(每个路径可能包含冒号)并使用 PySys_SetObject 来设置 sys.path 来绕过此问题:
现在解释器将将“foo:bar”视为
sys.path
的独特组件。The problem you're running into is the
PySys_SetPath
function parses the string you pass using a colon as the delimiter. That parser sees each:
character as delimiting a path, and there isn't a way around this (can't be escaped).However, you can bypass this by creating a list of the individual paths (each of which may contain colons) and use
PySys_SetObject
to set thesys.path
:Now the interpreter will see
"foo:bar"
as a distinct component of thesys.path
.在文件路径中支持冒号会在多个操作系统上引发大量蠕虫病毒;例如,它在 Windows 或 Mac OS X 上不是有效的路径字符,而且正是由于这个原因,在脚本环境上下文中支持它似乎不是一个特别合理的事情。事实上,我有点惊讶 Linux 也允许使用冒号文件名,特别是因为 : 是一个非常常见的路径分隔符。
您可以尝试转义冒号,即将 /path:to/ 转换为 /path\:to/ 并查看是否有效。除此之外,只需告诉用户避免在文件名中使用冒号即可。他们会在很多不同的环境中遇到各种各样的问题,这显然是一个坏主意。
Supporting colons in a file path opens up a huge can of worms on multiple operating systems; it is not a valid path character on Windows or Mac OS X, for example, and it doesn't seem like a particularly reasonable thing to support in the context of a scripting environment either for exactly this reason. I'm actually a bit surprised that Linux allows colon filenames too, especially since : is a very common path separator character.
You might try escaping the colon out, i.e. converting /path:to/ to /path\:to/ and see if that works. Other than that, just tell the user to avoid using colons in their file names. They will run into all sorts of problems in quite a few different environments and it's a just plain bad idea.