CODEWITHSUNDEEP
pythonos.path
python novice
python novice

Reputation: 379

Create a new folder after moving 1 folder back

Hi I have this old path:

OldPath = "C:\\Desktop\\Outerfolder\\InnerFolder"

And using the following slice of code:

os.path.normpath(OldPath + os.sep + os.pardir

I get C:\Desktop\Outerfolder But using it within another slice of code:

NewFolder = os.path.join(os.path.normpath(OldPath + os.sep + os.pardir),"\\NewInnerFolder")
print NewFolder

I only get :

\NewInnerFolder

Why is that?

Upvotes: 0

Views: 145

Answers (1)

gns3
gns3

Reputation: 71

Maybe you should write like below, without '//'

NewFolder = os.path.join(os.path.normpath(OldPath + os.sep + os.pardir),"NewInnerFolder")
print NewFolder

When you pass '//NewInnerFolder', the os.path.join will treat it as a 'absolute path' and join it to drive_path.

This is the source code of os.path.join in python 3.5: 

def join(path, *paths):
    if isinstance(path, bytes):
        sep = b'\\'
        seps = b'\\/'
        colon = b':'
    else:
        sep = '\\'
        seps = '\\/'
        colon = ':'
    try:
        if not paths:
            path[:0] + sep  #23780: Ensure compatible data type even if p is null.
        result_drive, result_path = splitdrive(path)
        for p in paths:
            p_drive, p_path = splitdrive(p)
            if p_path and p_path[0] in seps:
                # Second path is absolute
                if p_drive or not result_drive:
                    result_drive = p_drive
                result_path = p_path
                continue
            elif p_drive and p_drive != result_drive:
                if p_drive.lower() != result_drive.lower():
                    # Different drives => ignore the first path entirely
                    result_drive = p_drive
                    result_path = p_path
                    continue
                # Same drive in different case
                result_drive = p_drive
            # Second path is relative to the first
            if result_path and result_path[-1] not in seps:
                result_path = result_path + sep
            result_path = result_path + p_path
        ## add separator between UNC and non-absolute path
        if (result_path and result_path[0] not in seps and
            result_drive and result_drive[-1:] != colon):
            return result_drive + sep + result_path
        return result_drive + result_path
    except (TypeError, AttributeError, BytesWarning):
        genericpath._check_arg_types('join', path, *paths)
        raise

Upvotes: 2

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