（26）Python获取某个文件存放的相对路径（更改任意目录下保持不变）

1. import os
2. import platform
3. def getSeparator():
4. '''
5. 获取不同平台下的斜杠符号
6. :return:
7. Created by Wu Yongcong 2017-8-17
8. '''
9. if 'Windows' == platform.system():
10. separator = '\\'
11. else:
12. separator = '/'
13. return separator
14. sysEnv = getSeparator()
15. def getRootDir():
16. """
17. :return:
18. """
19. sep = getSeparator()
20. wkDir = os.getcwd()
21. # rootDir = "" if 'Windows' == platform.system() else "/"
22. items = wkDir.split(sep)
23. for i, item in enumerate(reversed(items)):
24. if item == "demo_end":
25. rootDir = sep.join(items[:-i])
26. return rootDir
27. print(getRootDir()+sysEnv+"saversc") #打印出相对路径