This module implements some useful functions on pathnames.
- abspath(path)
-
Return a normalized absolutized version of the pathname path.
On most platforms, this is equivalent to
normpath(join(os.getcwd(), path)).
New in version 1.5.2.
- basename(path)
-
Return the base name of pathname path. This is the second half
of the pair returned by
split(path). Note that the
result of this function is different from the
Unix basename program; where basename for
'/foo/bar/' returns 'bar', the basename()
function returns an empty string ('').
- commonprefix(list)
-
Return the longest path prefix (taken character-by-character) that is a
prefix of all paths in
list. If list is empty, return the empty string
(
''). Note that this may return invalid paths because it works a
character at a time.
- dirname(path)
-
Return the directory name of pathname path. This is the first
half of the pair returned by
split(path).
- exists(path)
-
Return true if path refers to an existing path.
- expanduser(path)
-
Return the argument with an initial component of "~" or
"~user" replaced by that user's home directory. An
initial "~" is replaced by the environment variable
HOME; an initial "~user" is looked up in the
password directory through the built-in module
pwd . If the expansion fails, or if the
path does not begin with a tilde, the path is returned unchanged. On
the Macintosh, this always returns path unchanged.
- expandvars(path)
-
Return the argument with environment variables expanded. Substrings
of the form "$name" or "${name}" are
replaced by the value of environment variable name. Malformed
variable names and references to non-existing variables are left
unchanged. On the Macintosh, this always returns path
unchanged.
- getatime(path)
-
Return the time of last access of filename. The return
value is integer giving the number of seconds since the epoch (see the
time module). Raise os.error if the file does
not exist or is inaccessible.
New in version 1.5.2.
- getmtime(path)
-
Return the time of last modification of filename. The return
value is integer giving the number of seconds since the epoch (see the
time module). Raise os.error if the file does
not exist or is inaccessible.
New in version 1.5.2.
- getsize(path)
-
Return the size, in bytes, of filename. Raise
os.error if the file does not exist or is inaccessible.
New in version 1.5.2.
- isabs(path)
-
Return true if path is an absolute pathname (begins with a
slash).
- isfile(path)
-
Return true if path is an existing regular file. This follows
symbolic links, so both islink() and isfile()
can be true for the same path.
- isdir(path)
-
Return true if path is an existing directory. This follows
symbolic links, so both islink() and isdir() can
be true for the same path.
- islink(path)
-
Return true if path refers to a directory entry that is a
symbolic link. Always false if symbolic links are not supported.
- ismount(path)
-
Return true if pathname path is a mount point: a point in
a file system where a different file system has been mounted. The
function checks whether path's parent, path/.., is
on a different device than path, or whether path/..
and path point to the same i-node on the same device -- this
should detect mount points for all Unix and POSIX variants.
- join(path1[, path2[, ...]])
-
Joins one or more path components intelligently. If any component is
an absolute path, all previous components are thrown away, and joining
continues. The return value is the concatenation of path1, and
optionally path2, etc., with exactly one slash (
'/')
inserted between components, unless path is empty.
- normcase(path)
-
Normalize the case of a pathname. On Unix, this returns the path
unchanged; on case-insensitive filesystems, it converts the path to
lowercase. On Windows, it also converts forward slashes to backward
slashes.
- normpath(path)
-
Normalize a pathname. This collapses redundant separators and
up-level references, e.g.
A//B, A/./B and
A/foo/../B all become A/B. It does not normalize the
case (use normcase() for that). On Windows, it converts
forward slashes to backward slashes.
- samefile(path1, path2)
-
Return true if both pathname arguments refer to the same file or
directory (as indicated by device number and i-node number).
Raise an exception if a os.stat() call on either pathname
fails.
Availability: Macintosh, Unix.
- sameopenfile(fp1, fp2)
-
Return true if the file objects fp1 and fp2 refer to the
same file. The two file objects may represent different file
descriptors.
Availability: Macintosh, Unix.
- samestat(stat1, stat2)
-
Return true if the stat tuples stat1 and stat2 refer to
the same file. These structures may have been returned by
fstat(), lstat(), or stat(). This
function implements the underlying comparison used by
samefile() and sameopenfile().
Availability: Macintosh, Unix.
- split(path)
-
Split the pathname path into a pair,
(head,
tail) where tail is the last pathname component and
head is everything leading up to that. The tail part will
never contain a slash; if path ends in a slash, tail will
be empty. If there is no slash in path, head will be
empty. If path is empty, both head and tail are
empty. Trailing slashes are stripped from head unless it is the
root (one or more slashes only). In nearly all cases,
join(head, tail) equals path (the only
exception being when there were multiple slashes separating head
from tail).
- splitdrive(path)
-
Split the pathname path into a pair
(drive,
tail) where drive is either a drive specification or the
empty string. On systems which do not use drive specifications,
drive will always be the empty string. In all cases,
drive + tail will be the same as path.
New in version 1.3.
- splitext(path)
-
Split the pathname path into a pair
(root, ext)
such that root + ext == path,
and ext is empty or begins with a period and contains
at most one period.
- walk(path, visit, arg)
-
Calls the function visit with arguments
(arg, dirname, names) for each directory in the
directory tree rooted at path (including path itself, if it
is a directory). The argument dirname specifies the visited
directory, the argument names lists the files in the directory
(gotten from os.listdir(dirname)).
The visit function may modify names to
influence the set of directories visited below dirname, e.g., to
avoid visiting certain parts of the tree. (The object referred to by
names must be modified in place, using del or slice
assignment.)
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