Retrieving Filename from Path

robert.dowell at gmail.com robert.dowell at gmail.com
Wed Aug 31 19:17:58 CEST 2005


>>> import os.path
>>> help(os.path)
Help on module ntpath:

NAME
    ntpath - Common pathname manipulations, WindowsNT/95 version.

FILE
    c:\data\utils\python24\lib\ntpath.py

DESCRIPTION
    Instead of importing this module directly, import os and refer to
this
    module as os.path.

FUNCTIONS
    abspath(path)
        Return the absolute version of a path

    basename(p)
        Returns the final component of a pathname

    commonprefix(m)
        Given a list of pathnames, returns the longest common leading
component

    dirname(p)
        Returns the directory component of a pathname

    exists(path)
        Test whether a path exists

    expanduser(path)
        Expand ~ and ~user constructs.

        If user or $HOME is unknown, do nothing.

    expandvars(path)
        Expand shell variables of form $var and ${var}.

        Unknown variables are left unchanged.

    getatime(filename)
        Return the last access time of a file, reported by os.stat()

    getctime(filename)
        Return the creation time of a file, reported by os.stat().

    getmtime(filename)
        Return the last modification time of a file, reported by
os.stat()

    getsize(filename)
        Return the size of a file, reported by os.stat()

    isabs(s)
        Test whether a path is absolute

    isdir(path)
        Test whether a path is a directory

    isfile(path)
        Test whether a path is a regular file

    islink(path)
        Test for symbolic link.  On WindowsNT/95 always returns false

    ismount(path)
        Test whether a path is a mount point (defined as root of drive)

    join(a, *p)
        Join two or more pathname components, inserting "\" as needed

    normcase(s)
        Normalize case of pathname.

        Makes all characters lowercase and all slashes into
backslashes.

    normpath(path)
        Normalize path, eliminating double slashes, etc.

    realpath = abspath(path)
        Return the absolute version of a path

    split(p)
        Split a pathname.

        Return tuple (head, tail) where tail is everything after the
final slash.
        Either part may be empty.

    splitdrive(p)
        Split a pathname into drive and path specifiers. Returns a
2-tuple
        "(drive,path)";  either part may be empty

    splitext(p)
        Split the extension from a pathname.

        Extension is everything from the last dot to the end.
        Return (root, ext), either part may be empty.

    splitunc(p)
        Split a pathname into UNC mount point and relative path
specifiers.

        Return a 2-tuple (unc, rest); either part may be empty.
        If unc is not empty, it has the form '//host/mount' (or similar
        using backslashes).  unc+rest is always the input path.
        Paths containing drive letters never have an UNC part.

    walk(top, func, arg)
        Directory tree walk with callback function.

        For each directory in the directory tree rooted at top
(including top
        itself, but excluding '.' and '..'), call func(arg, dirname,
fnames).
        dirname is the name of the directory, and fnames a list of the
names of
        the files and subdirectories in dirname (excluding '.' and
'..').  func
        may modify the fnames list in-place (e.g. via del or slice
assignment),
        and walk will only recurse into the subdirectories whose names
remain in
        fnames; this can be used to implement a filter, or to impose a
specific
        order of visiting.  No semantics are defined for, or required
of, arg,
        beyond that arg is always passed to func.  It can be used,
e.g., to pass
        a filename pattern, or a mutable object designed to accumulate
        statistics.  Passing None for arg is common.

DATA
    __all__ = ['normcase', 'isabs', 'join', 'splitdrive', 'split',
'splite...
    altsep = '/'
    curdir = '.'
    defpath = r'.;C:\bin'
    devnull = 'nul'
    extsep = '.'
    pardir = '..'
    pathsep = ';'
    sep = r'\'
    supports_unicode_filenames = True




Rob Cowie wrote:
> Hi,
>
> Given a string representing the path to a file, what is the best way to
> get at the filename? Does the OS module provide a function to parse the
> path? or is it acceptable to split the string using '/' as delimiters
> and get the last 'word'. The reason I'm not entirely happy with that
> method is that it is platform specific. I would prefer to use a built
> in method if possible.
> 
> Cheers,
> 
> Rob Cowie




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