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<H2><A NAME="SECTION0083010000000000000000">
6.30.1 Cross Platform</A>
</H2>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-2567' xml:id='l2h-2567' class="function">architecture</tt></b>(</nobr></td>
  <td><var>executable=sys.executable, bits='', linkage=''</var>)</td></tr></table></dt>
<dd>
  Queries the given executable (defaults to the Python interpreter
  binary) for various architecture information.

<P>
Returns a tuple <code>(bits, linkage)</code> which contain information about
  the bit architecture and the linkage format used for the
  executable. Both values are returned as strings.

<P>
Values that cannot be determined are returned as given by the
  parameter presets. If bits is given as <code>''</code>, the
  <tt class="cfunction">sizeof(pointer)</tt>
  (or <tt class="cfunction">sizeof(long)</tt> on Python version &lt; 1.5.2) is used as
  indicator for the supported pointer size.

<P>
The function relies on the system's <span class="file">file</span> command to do the
  actual work. This is available on most if not all <span class="Unix">Unix</span> 
  platforms and some non-<span class="Unix">Unix</span> platforms and then only if the
  executable points to the Python interpreter.  Reasonable defaults
  are used when the above needs are not met.
</dl>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-2568' xml:id='l2h-2568' class="function">machine</tt></b>(</nobr></td>
  <td><var></var>)</td></tr></table></dt>
<dd>
  Returns the machine type, e.g. <code>'i386'</code>.
  An empty string is returned if the value cannot be determined.
</dl>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-2569' xml:id='l2h-2569' class="function">node</tt></b>(</nobr></td>
  <td><var></var>)</td></tr></table></dt>
<dd>
  Returns the computer's network name (may not be fully qualified!).
  An empty string is returned if the value cannot be determined.
</dl>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-2570' xml:id='l2h-2570' class="function">platform</tt></b>(</nobr></td>
  <td><var>aliased=0, terse=0</var>)</td></tr></table></dt>
<dd>
  Returns a single string identifying the underlying platform
  with as much useful information as possible.

<P>
The output is intended to be <em>human readable</em> rather than
  machine parseable. It may look different on different platforms and
  this is intended.

<P>
If <var>aliased</var> is true, the function will use aliases for various
  platforms that report system names which differ from their common
  names, for example SunOS will be reported as Solaris.  The
  <tt class="function">system_alias()</tt> function is used to implement this.

<P>
Setting <var>terse</var> to true causes the function to return only the
  absolute minimum information needed to identify the platform.
</dl>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-2571' xml:id='l2h-2571' class="function">processor</tt></b>(</nobr></td>
  <td><var></var>)</td></tr></table></dt>
<dd>
  Returns the (real) processor name, e.g. <code>'amdk6'</code>.

<P>
An empty string is returned if the value cannot be determined. Note
  that many platforms do not provide this information or simply return
  the same value as for <tt class="function">machine()</tt>.  NetBSD does this.
</dl>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-2572' xml:id='l2h-2572' class="function">python_build</tt></b>(</nobr></td>
  <td><var></var>)</td></tr></table></dt>
<dd>
  Returns a tuple <code>(<var>buildno</var>, <var>builddate</var>)</code> stating the
  Python build number and date as strings.
</dl>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-2573' xml:id='l2h-2573' class="function">python_compiler</tt></b>(</nobr></td>
  <td><var></var>)</td></tr></table></dt>
<dd>
  Returns a string identifying the compiler used for compiling Python.
</dl>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-2574' xml:id='l2h-2574' class="function">python_version</tt></b>(</nobr></td>
  <td><var></var>)</td></tr></table></dt>
<dd>
  Returns the Python version as string <code>'major.minor.patchlevel'</code>

<P>
Note that unlike the Python <code>sys.version</code>, the returned value
  will always include the patchlevel (it defaults to 0).
</dl>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-2575' xml:id='l2h-2575' class="function">python_version_tuple</tt></b>(</nobr></td>
  <td><var></var>)</td></tr></table></dt>
<dd>
  Returns the Python version as tuple <code>(<var>major</var>, <var>minor</var>,
  <var>patchlevel</var>)</code> of strings.

<P>
Note that unlike the Python <code>sys.version</code>, the returned value
  will always include the patchlevel (it defaults to <code>'0'</code>).
</dl>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-2576' xml:id='l2h-2576' class="function">release</tt></b>(</nobr></td>
  <td><var></var>)</td></tr></table></dt>
<dd>
  Returns the system's release, e.g. <code>'2.2.0'</code> or <code>'NT'</code>
  An empty string is returned if the value cannot be determined.
</dl>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-2577' xml:id='l2h-2577' class="function">system</tt></b>(</nobr></td>
  <td><var></var>)</td></tr></table></dt>
<dd>
  Returns the system/OS name, e.g. <code>'Linux'</code>, <code>'Windows'</code>,
  or <code>'Java'</code>.
  An empty string is returned if the value cannot be determined.
</dl>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-2578' xml:id='l2h-2578' class="function">system_alias</tt></b>(</nobr></td>
  <td><var>system, release, version</var>)</td></tr></table></dt>
<dd>
  Returns <code>(<var>system</var>, <var>release</var>, <var>version</var>)</code> aliased
  to common marketing names used for some systems.  It also does some
  reordering of the information in some cases where it would otherwise
  cause confusion.
</dl>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-2579' xml:id='l2h-2579' class="function">version</tt></b>(</nobr></td>
  <td><var></var>)</td></tr></table></dt>
<dd>
  Returns the system's release version, e.g. <code>'#3 on degas'</code>.
  An empty string is returned if the value cannot be determined.
</dl>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-2580' xml:id='l2h-2580' class="function">uname</tt></b>(</nobr></td>
  <td><var></var>)</td></tr></table></dt>
<dd>
  Fairly portable uname interface. Returns a tuple of strings
  <code>(<var>system</var>, <var>node</var>, <var>release</var>, <var>version</var>,
  <var>machine</var>, <var>processor</var>)</code> identifying the underlying
  platform.

<P>
Note that unlike the <tt class="function">os.uname()</tt> function this also returns
  possible processor information as additional tuple entry.

<P>
Entries which cannot be determined are set to <code>''</code>.
</dl>

<P>

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	55	<H2><A NAME="SECTION0083010000000000000000">
	56	6.30.1 Cross Platform</A>
	57	</H2>
	58
	59	<P>
	60	<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
	61	<td><nobr><b><tt id='l2h-2567' xml:id='l2h-2567' class="function">architecture</tt></b>(</nobr></td>
	62	<td><var>executable=sys.executable, bits='', linkage=''</var>)</td></tr></table></dt>
	63	<dd>
	64	Queries the given executable (defaults to the Python interpreter
65	binary) for various architecture information.
66
67	<P>
68	Returns a tuple <code>(bits, linkage)</code> which contain information about
69	the bit architecture and the linkage format used for the
70	executable. Both values are returned as strings.
71
72	<P>
73	Values that cannot be determined are returned as given by the
74	parameter presets. If bits is given as <code>''</code>, the
75	<tt class="cfunction">sizeof(pointer)</tt>
76	(or <tt class="cfunction">sizeof(long)</tt> on Python version < 1.5.2) is used as
77	indicator for the supported pointer size.
78
79	<P>
80	The function relies on the system's <span class="file">file</span> command to do the
81	actual work. This is available on most if not all <span class="Unix">Unix</span>
82	platforms and some non-<span class="Unix">Unix</span> platforms and then only if the
83	executable points to the Python interpreter. Reasonable defaults
84	are used when the above needs are not met.
85	</dl>
86
87	<P>
88	<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
89	<td><nobr><b><tt id='l2h-2568' xml:id='l2h-2568' class="function">machine</tt></b>(</nobr></td>
90	<td><var></var>)</td></tr></table></dt>
91	<dd>
92	Returns the machine type, e.g. <code>'i386'</code>.
93	An empty string is returned if the value cannot be determined.
94	</dl>
95
96	<P>
97	<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
98	<td><nobr><b><tt id='l2h-2569' xml:id='l2h-2569' class="function">node</tt></b>(</nobr></td>
99	<td><var></var>)</td></tr></table></dt>
100	<dd>
101	Returns the computer's network name (may not be fully qualified!).
102	An empty string is returned if the value cannot be determined.
103	</dl>
104
105	<P>
106	<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
107	<td><nobr><b><tt id='l2h-2570' xml:id='l2h-2570' class="function">platform</tt></b>(</nobr></td>
108	<td><var>aliased=0, terse=0</var>)</td></tr></table></dt>
109	<dd>
110	Returns a single string identifying the underlying platform
111	with as much useful information as possible.
112
113	<P>
114	The output is intended to be <em>human readable</em> rather than
115	machine parseable. It may look different on different platforms and
116	this is intended.
117
118	<P>
119	If <var>aliased</var> is true, the function will use aliases for various
120	platforms that report system names which differ from their common
121	names, for example SunOS will be reported as Solaris. The
122	<tt class="function">system_alias()</tt> function is used to implement this.
123
124	<P>
125	Setting <var>terse</var> to true causes the function to return only the
126	absolute minimum information needed to identify the platform.
127	</dl>
128
129	<P>
130	<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
131	<td><nobr><b><tt id='l2h-2571' xml:id='l2h-2571' class="function">processor</tt></b>(</nobr></td>
132	<td><var></var>)</td></tr></table></dt>
133	<dd>
134	Returns the (real) processor name, e.g. <code>'amdk6'</code>.
135
136	<P>
137	An empty string is returned if the value cannot be determined. Note
138	that many platforms do not provide this information or simply return
139	the same value as for <tt class="function">machine()</tt>. NetBSD does this.
140	</dl>
141
142	<P>
143	<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
144	<td><nobr><b><tt id='l2h-2572' xml:id='l2h-2572' class="function">python_build</tt></b>(</nobr></td>
145	<td><var></var>)</td></tr></table></dt>
146	<dd>
147	Returns a tuple <code>(<var>buildno</var>, <var>builddate</var>)</code> stating the
148	Python build number and date as strings.
149	</dl>
150
151	<P>
152	<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
153	<td><nobr><b><tt id='l2h-2573' xml:id='l2h-2573' class="function">python_compiler</tt></b>(</nobr></td>
154	<td><var></var>)</td></tr></table></dt>
155	<dd>
156	Returns a string identifying the compiler used for compiling Python.
157	</dl>
158
159	<P>
160	<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
161	<td><nobr><b><tt id='l2h-2574' xml:id='l2h-2574' class="function">python_version</tt></b>(</nobr></td>
162	<td><var></var>)</td></tr></table></dt>
163	<dd>
164	Returns the Python version as string <code>'major.minor.patchlevel'</code>
165
166	<P>
167	Note that unlike the Python <code>sys.version</code>, the returned value
168	will always include the patchlevel (it defaults to 0).
169	</dl>
170
171	<P>
172	<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
173	<td><nobr><b><tt id='l2h-2575' xml:id='l2h-2575' class="function">python_version_tuple</tt></b>(</nobr></td>
174	<td><var></var>)</td></tr></table></dt>
175	<dd>
176	Returns the Python version as tuple <code>(<var>major</var>, <var>minor</var>,
177	<var>patchlevel</var>)</code> of strings.
178
179	<P>
180	Note that unlike the Python <code>sys.version</code>, the returned value
181	will always include the patchlevel (it defaults to <code>'0'</code>).
182	</dl>
183
184	<P>
185	<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
186	<td><nobr><b><tt id='l2h-2576' xml:id='l2h-2576' class="function">release</tt></b>(</nobr></td>
187	<td><var></var>)</td></tr></table></dt>
188	<dd>
189	Returns the system's release, e.g. <code>'2.2.0'</code> or <code>'NT'</code>
190	An empty string is returned if the value cannot be determined.
191	</dl>
192
193	<P>
194	<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
195	<td><nobr><b><tt id='l2h-2577' xml:id='l2h-2577' class="function">system</tt></b>(</nobr></td>
196	<td><var></var>)</td></tr></table></dt>
197	<dd>
198	Returns the system/OS name, e.g. <code>'Linux'</code>, <code>'Windows'</code>,
199	or <code>'Java'</code>.
200	An empty string is returned if the value cannot be determined.
201	</dl>
202
203	<P>
204	<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
205	<td><nobr><b><tt id='l2h-2578' xml:id='l2h-2578' class="function">system_alias</tt></b>(</nobr></td>
206	<td><var>system, release, version</var>)</td></tr></table></dt>
207	<dd>
208	Returns <code>(<var>system</var>, <var>release</var>, <var>version</var>)</code> aliased
209	to common marketing names used for some systems. It also does some
210	reordering of the information in some cases where it would otherwise
211	cause confusion.
212	</dl>
213
214	<P>
215	<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
216	<td><nobr><b><tt id='l2h-2579' xml:id='l2h-2579' class="function">version</tt></b>(</nobr></td>
217	<td><var></var>)</td></tr></table></dt>
218	<dd>
219	Returns the system's release version, e.g. <code>'#3 on degas'</code>.
220	An empty string is returned if the value cannot be determined.
221	</dl>
222
223	<P>
224	<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
225	<td><nobr><b><tt id='l2h-2580' xml:id='l2h-2580' class="function">uname</tt></b>(</nobr></td>
226	<td><var></var>)</td></tr></table></dt>
227	<dd>
228	Fairly portable uname interface. Returns a tuple of strings
229	<code>(<var>system</var>, <var>node</var>, <var>release</var>, <var>version</var>,
230	<var>machine</var>, <var>processor</var>)</code> identifying the underlying
231	platform.
232
233	<P>
234	Note that unlike the <tt class="function">os.uname()</tt> function this also returns
235	possible processor information as additional tuple entry.
236
237	<P>
238	Entries which cannot be determined are set to <code>''</code>.
239	</dl>
240
241	<P>
242
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