6.1.6 Miscellaneous System Information
-
- 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 in the
confstr_names dictionary. For
configuration variables not included in that mapping, passing an integer for name
is also accepted. Availability: Unix.
If the configuration value specified by name isn't defined, the empty string
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: Unix.
-
- 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.
-
- 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: 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: 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 the Macintosh. 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 the Macintosh. Also
available via os.path.
- sep
- The character used by the operating system to separate pathname components, for example,
"/" for POSIX or ":"
for the Macintosh. 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 patch
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.
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