Python Pocket Reference, 3rd Edition

The os System Module

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103

TMP_MAX

The maximum number of unique names that tmpnam gen-

erates before reusing names.

utime(path, (atime, mtime))

Sets file path access and modification times.

access(path, mode)

statvfs(path)

pathconf(path, infoname)

pathconf_names

Consult the Python Library Reference or Unix manpages

for details.

walk(top [, topdown=True [, onerror=None]]))

Generates the filenames in a directory tree by walking the

tree either top-down or bottom-up. For each directory in

the tree rooted at directory

top (including top itself),

yields a three-tuple

(dirpath, dirnames, filenames).

dirpath is a string, the path to the directory. dirnames is a

list of the names of the subdirectories in

dirpath (exclud-

ing

. and ..). filenames is a list of the names of the non-

directory files in

dirpath. Note that the names in the lists

do not contain path components. To get a full path

(which begins with

top) to a file or directory in dirpath,

do

os.path.join(dirpath, name).

If optional argument

topdown is true or not specified, the

triple for a directory is generated before the triples for

any of its subdirectories (directories are generated top-

down). If

topdown is false, the triple for a directory is gen-

erated after the triples for all its subdirectories (directories

are generated bottom-up). If optional

onerror

is

specified,

it should be a function, which will be called with one

argument, an

os.error instance. See also ...