Python Relative Path Simplifier

I am having issues with paths, hitting the Windows' restriction on the number of characters in the path at 256. In some place in my python script the 2 paths are getting appended a

Solution 1:

Use os.path.normpath to resolve .. in the path:

In [93]: os.path.normpath(os.path.join(path1,path2))
Out[93]: '../Source/directory/Common/headerFile.h'

Solution 2:

I would use os.path.normpath (+1 @unutbu), but just for fun, here's a way to do it manually:

def normpath(path3):
    path = path3.split('/')  # or use os.path.sep
    answer = []
    for p inpath:
        if p != '..':
            answer.append(p)
        else:
            if all(a=='..'for a in answer):
                answer.append(p)
            else:
                answer.pop()
    return'/'.join(answer)

And the output:

In [41]: normpath("../../../../../../../Source/lib/Target/abcd/abc_def_ghf/source/zzzModule/../../../../../../../../Source/directory/Common/headerFile.h")
Out[41]: '../../../../../../../../Source/directory/Common/headerFile.h'