1 :mod:`platform` --- Access to underlying platform's identifying data
2 =====================================================================
5 :synopsis: Retrieves as much platform identifying data as possible.
6 .. moduleauthor:: Marc-Andre Lemburg <mal@egenix.com>
7 .. sectionauthor:: Bjorn Pettersen <bpettersen@corp.fairisaac.com>
14 Specific platforms listed alphabetically, with Linux included in the Unix
22 .. function:: architecture(executable=sys.executable, bits='', linkage='')
24 Queries the given executable (defaults to the Python interpreter binary) for
25 various architecture information.
27 Returns a tuple ``(bits, linkage)`` which contain information about the bit
28 architecture and the linkage format used for the executable. Both values are
31 Values that cannot be determined are returned as given by the parameter presets.
32 If bits is given as ``''``, the :cfunc:`sizeof(pointer)` (or
33 :cfunc:`sizeof(long)` on Python version < 1.5.2) is used as indicator for the
34 supported pointer size.
36 The function relies on the system's :file:`file` command to do the actual work.
37 This is available on most if not all Unix platforms and some non-Unix platforms
38 and then only if the executable points to the Python interpreter. Reasonable
39 defaults are used when the above needs are not met.
42 .. function:: machine()
44 Returns the machine type, e.g. ``'i386'``. An empty string is returned if the
45 value cannot be determined.
50 Returns the computer's network name (may not be fully qualified!). An empty
51 string is returned if the value cannot be determined.
54 .. function:: platform(aliased=0, terse=0)
56 Returns a single string identifying the underlying platform with as much useful
57 information as possible.
59 The output is intended to be *human readable* rather than machine parseable. It
60 may look different on different platforms and this is intended.
62 If *aliased* is true, the function will use aliases for various platforms that
63 report system names which differ from their common names, for example SunOS will
64 be reported as Solaris. The :func:`system_alias` function is used to implement
67 Setting *terse* to true causes the function to return only the absolute minimum
68 information needed to identify the platform.
71 .. function:: processor()
73 Returns the (real) processor name, e.g. ``'amdk6'``.
75 An empty string is returned if the value cannot be determined. Note that many
76 platforms do not provide this information or simply return the same value as for
77 :func:`machine`. NetBSD does this.
80 .. function:: python_build()
82 Returns a tuple ``(buildno, builddate)`` stating the Python build number and
86 .. function:: python_compiler()
88 Returns a string identifying the compiler used for compiling Python.
91 .. function:: python_branch()
93 Returns a string identifying the Python implementation SCM branch.
98 .. function:: python_implementation()
100 Returns a string identifying the Python implementation. Possible return values
101 are: 'CPython', 'IronPython', 'Jython'
103 .. versionadded:: 2.6
106 .. function:: python_revision()
108 Returns a string identifying the Python implementation SCM revision.
110 .. versionadded:: 2.6
113 .. function:: python_version()
115 Returns the Python version as string ``'major.minor.patchlevel'``
117 Note that unlike the Python ``sys.version``, the returned value will always
118 include the patchlevel (it defaults to 0).
121 .. function:: python_version_tuple()
123 Returns the Python version as tuple ``(major, minor, patchlevel)`` of strings.
125 Note that unlike the Python ``sys.version``, the returned value will always
126 include the patchlevel (it defaults to ``'0'``).
129 .. function:: release()
131 Returns the system's release, e.g. ``'2.2.0'`` or ``'NT'`` An empty string is
132 returned if the value cannot be determined.
135 .. function:: system()
137 Returns the system/OS name, e.g. ``'Linux'``, ``'Windows'``, or ``'Java'``. An
138 empty string is returned if the value cannot be determined.
141 .. function:: system_alias(system, release, version)
143 Returns ``(system, release, version)`` aliased to common marketing names used
144 for some systems. It also does some reordering of the information in some cases
145 where it would otherwise cause confusion.
148 .. function:: version()
150 Returns the system's release version, e.g. ``'#3 on degas'``. An empty string is
151 returned if the value cannot be determined.
154 .. function:: uname()
156 Fairly portable uname interface. Returns a tuple of strings ``(system, node,
157 release, version, machine, processor)`` identifying the underlying platform.
159 Note that unlike the :func:`os.uname` function this also returns possible
160 processor information as additional tuple entry.
162 Entries which cannot be determined are set to ``''``.
169 .. function:: java_ver(release='', vendor='', vminfo=('','',''), osinfo=('','',''))
171 Version interface for Jython.
173 Returns a tuple ``(release, vendor, vminfo, osinfo)`` with *vminfo* being a
174 tuple ``(vm_name, vm_release, vm_vendor)`` and *osinfo* being a tuple
175 ``(os_name, os_version, os_arch)``. Values which cannot be determined are set to
176 the defaults given as parameters (which all default to ``''``).
183 .. function:: win32_ver(release='', version='', csd='', ptype='')
185 Get additional version information from the Windows Registry and return a tuple
186 ``(version, csd, ptype)`` referring to version number, CSD level and OS type
187 (multi/single processor).
189 As a hint: *ptype* is ``'Uniprocessor Free'`` on single processor NT machines
190 and ``'Multiprocessor Free'`` on multi processor machines. The *'Free'* refers
191 to the OS version being free of debugging code. It could also state *'Checked'*
192 which means the OS version uses debugging code, i.e. code that checks arguments,
197 Note: this function works best with Mark Hammond's
198 :mod:`win32all` package installed, but also on Python 2.3 and
199 later (support for this was added in Python 2.6). It obviously
200 only runs on Win32 compatible platforms.
206 .. function:: popen(cmd, mode='r', bufsize=None)
208 Portable :func:`popen` interface. Find a working popen implementation
209 preferring :func:`win32pipe.popen`. On Windows NT, :func:`win32pipe.popen`
210 should work; on Windows 9x it hangs due to bugs in the MS C library.
217 .. function:: mac_ver(release='', versioninfo=('','',''), machine='')
219 Get Mac OS version information and return it as tuple ``(release, versioninfo,
220 machine)`` with *versioninfo* being a tuple ``(version, dev_stage,
221 non_release_version)``.
223 Entries which cannot be determined are set to ``''``. All tuple entries are
226 Documentation for the underlying :cfunc:`gestalt` API is available online at
227 http://www.rgaros.nl/gestalt/.
234 .. function:: dist(distname='', version='', id='', supported_dists=('SuSE','debian','redhat','mandrake',...))
236 This is an old version of the functionality now provided by
237 :func:`linux_distribution`. For new code, please use the
238 :func:`linux_distribution`.
240 The only difference between the two is that ``dist()`` always
241 returns the short name of the distribution taken from the
242 ``supported_dists`` parameter.
246 .. function:: linux_distribution(distname='', version='', id='', supported_dists=('SuSE','debian','redhat','mandrake',...), full_distribution_name=1)
248 Tries to determine the name of the Linux OS distribution name.
250 ``supported_dists`` may be given to define the set of Linux distributions to
251 look for. It defaults to a list of currently supported Linux distributions
252 identified by their release file name.
254 If ``full_distribution_name`` is true (default), the full distribution read
255 from the OS is returned. Otherwise the short name taken from
256 ``supported_dists`` is used.
258 Returns a tuple ``(distname,version,id)`` which defaults to the args given as
259 parameters. ``id`` is the item in parentheses after the version number. It
260 is usually the version codename.
262 .. versionadded:: 2.6
264 .. function:: libc_ver(executable=sys.executable, lib='', version='', chunksize=2048)
266 Tries to determine the libc version against which the file executable (defaults
267 to the Python interpreter) is linked. Returns a tuple of strings ``(lib,
268 version)`` which default to the given parameters in case the lookup fails.
270 Note that this function has intimate knowledge of how different libc versions
271 add symbols to the executable is probably only usable for executables compiled
272 using :program:`gcc`.
274 The file is read and scanned in chunks of *chunksize* bytes.