Return string-valued system configuration values.
name specifies the configuration value to retrieve; it may be a
string which is the name of a defined system value; these names are
specified in a number of standards (POSIX, Unix 95, Unix 98, and
others). Some platforms define additional names as well. The names
known to the host operating system are given as the keys of the
confstr_names dictionary. For configuration variables not
included in that mapping, passing an integer for name is also
accepted.
Availability: Macintosh, Unix.
If the configuration value specified by name isn't defined,
None is returned.
If name is a string and is not known, ValueError is
raised. If a specific value for name is not supported by the
host system, even if it is included in confstr_names, an
OSError is raised with errno.EINVAL for the
error number.
confstr_names
Dictionary mapping names accepted by confstr() to the
integer values defined for those names by the host operating system.
This can be used to determine the set of names known to the system.
Availability: Macintosh, Unix.
getloadavg(
)
Return the number of processes in the system run queue averaged over
the last 1, 5, and 15 minutes or raises OSError if the load
average was unobtainable.
New in version 2.3.
sysconf(
name)
Return integer-valued system configuration values.
If the configuration value specified by name isn't defined,
-1 is returned. The comments regarding the name
parameter for confstr() apply here as well; the dictionary
that provides information on the known names is given by
sysconf_names.
Availability: Macintosh, Unix.
sysconf_names
Dictionary mapping names accepted by sysconf() to the
integer values defined for those names by the host operating system.
This can be used to determine the set of names known to the system.
Availability: Macintosh, Unix.
The follow data values are used to support path manipulation
operations. These are defined for all platforms.
Higher-level operations on pathnames are defined in the
os.path module.
curdir
The constant string used by the operating system to refer to the current
directory.
For example: '.' for POSIX or ':' for Mac OS 9.
Also available via os.path.
pardir
The constant string used by the operating system to refer to the parent
directory.
For example: '..' for POSIX or '::' for Mac OS 9.
Also available via os.path.
sep
The character used by the operating system to separate pathname components,
for example, "/" for POSIX or ":" for
Mac OS 9. Note that knowing this is not sufficient to be able to
parse or concatenate pathnames -- use os.path.split() and
os.path.join() -- but it is occasionally useful.
Also available via os.path.
altsep
An alternative character used by the operating system to separate pathname
components, or None if only one separator character exists. This is
set to "/" on Windows systems where sep is a
backslash.
Also available via os.path.
extsep
The character which separates the base filename from the extension;
for example, the "." in os.py.
Also available via os.path.
New in version 2.2.
pathsep
The character conventionally used by the operating system to separate
search path components (as in PATH), such as ":" for
POSIX or ";" for Windows.
Also available via os.path.
defpath
The default search path used by exec*p*() and
spawn*p*() if the environment doesn't have a 'PATH'
key.
Also available via os.path.
linesep
The string used to separate (or, rather, terminate) lines on the
current platform. This may be a single character, such as '\
n' for POSIX or '\r' for Mac OS, or multiple characters,
for example, '\r\n' for Windows.
devnull
The file path of the null device.
For example: '/dev/null' for POSIX or 'Dev:Nul' for
Mac OS 9.
Also available via os.path.
New in version 2.4.
