如何使用Python检查路径是否是跨平台方式的绝对路径或相对路径？

UNIX absolute path starts with '/', whereas Windows starts with alphabet 'C:' or '\'. Does python has a standard function to check if a path is absolute or relative?

UNIX绝对路径以'/'开头，而Windows以字母'C：'或'\'开头。 python是否有标准函数来检查路径是绝对路径还是相对路径？

7 个解决方案

#1

141

os.path.isabs returns True if the path is absolute, False if not. The documentation says it works in windows (I can confirm it works in Linux personally).

如果路径是绝对的，则os.path.isabs返回True，否则返回False。文档说它适用于Windows（我可以确认它可以在Linux中运行）。

os.path.isabs(my_path)

#2

And if what you really want is the absolute path, don't bother checking to see if it is, just get the abspath:

如果你真正想要的是绝对路径，不要费心检查它是否是，只需得到abspath：

import os

print os.path.abspath('.')

#3

Use os.path.isabs.

使用os.path.isabs。

#4

import os.path

os.path.isabs('\home\user')
True

os.path.isabs('user')
False

#5

The os.path module will have everything you need.

os.path模块将拥有您需要的一切。

#6

Actually I think none of the above answers addressed the real issue: cross-platform paths. What os.path does is load the OS dependent version of 'path' library. so the solution is to explicitly load the relevant (OS) path library:

实际上我认为上述答案都没有解决真正的问题：跨平台路径。 os.path的作用是加载“路径”库的操作系统相关版本。所以解决方案是显式加载相关的（OS）路径库：

import ntpath
import posixpath

ntpath.isabs("Z:/a/b/c../../H/I/J.txt")
    True
posixpath.isabs("Z:/a/b/c../../H/I/J.txt")
    False

#7

another way if you are not in current working directory, kinda dirty but it works for me.

另一种方式，如果你不在当前的工作目录，有点脏，但它适用于我。

import re
path = 'my/relative/path'
# path = '..my/relative/path'
# path = './my/relative/path'

pattern = r'([a-zA-Z0-9]|[.])+/'
is_ralative = bool(pattern)

#1

141