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<H2><A NAME="SECTION004320000000000000000"></A><A NAME="id-classes"></A>
<BR>
2.3.2 Reserved classes of identifiers
</H2>

<P>
Certain classes of identifiers (besides keywords) have special
meanings.  These classes are identified by the patterns of leading and
trailing underscore characters:

<P>
<DL>
<DT><STRONG><code>_*</code></STRONG></DT>
<DD>Not imported by "<tt class="samp">from <var>module</var> import *</tt>".  The special
  identifier "<tt class="samp">_</tt>" is used in the interactive interpreter to store
  the result of the last evaluation; it is stored in the
  <tt class="module">__builtin__</tt> module.  When not in interactive mode, "<tt class="samp">_</tt>"  has no special meaning and is not defined.
  See section&nbsp;<A href="import.html#import">6.12</A>, ``The <tt class="keyword">import</tt> statement.''

<P>
<span class="note"><b class="label">Note:</b>
The name "<tt class="samp">_</tt>" is often used in conjunction with
  internationalization; refer to the documentation for the
  <a class="ulink" href="../lib/module-gettext.html"
  ><tt class="module">gettext</tt> module</a> for more
  information on this convention.</span>

<P>
</DD>
<DT><STRONG><code>__*__</code></STRONG></DT>
<DD>System-defined names.  These names are defined by the interpreter
  and its implementation (including the standard library);
  applications should not expect to define additional names using this
  convention.  The set of names of this class defined by Python may be
  extended in future versions.
  See section&nbsp;<A href="specialnames.html#specialnames">3.3</A>, ``Special method names.''

<P>
</DD>
<DT><STRONG><code>__*</code></STRONG></DT>
<DD>Class-private names.  Names in this category, when used within the
  context of a class definition, are re-written to use a mangled form
  to help avoid name clashes between ``private'' attributes of base
  and derived classes.
  See section&nbsp;<A href="atom-identifiers.html#atom-identifiers">5.2.1</A>, ``Identifiers (Names).''

<P>
</DD>
</DL>

<P>

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	53
	54	<H2><A NAME="SECTION004320000000000000000"></A><A NAME="id-classes"></A>
	55	<BR>
	56	2.3.2 Reserved classes of identifiers
	57	</H2>
	58
	59	<P>
	60	Certain classes of identifiers (besides keywords) have special
	61	meanings. These classes are identified by the patterns of leading and
	62	trailing underscore characters:
	63
	64	<P>
65	<DL>
66	<DT><STRONG><code>_*</code></STRONG></DT>
67	<DD>Not imported by "<tt class="samp">from <var>module</var> import *</tt>". The special
68	identifier "<tt class="samp">_</tt>" is used in the interactive interpreter to store
69	the result of the last evaluation; it is stored in the
70	<tt class="module">__builtin__</tt> module. When not in interactive mode, "<tt class="samp">_</tt>" has no special meaning and is not defined.
71	See section <A href="import.html#import">6.12</A>, ``The <tt class="keyword">import</tt> statement.''
72
73	<P>
74	<span class="note"><b class="label">Note:</b>
75	The name "<tt class="samp">_</tt>" is often used in conjunction with
76	internationalization; refer to the documentation for the
77	<a class="ulink" href="../lib/module-gettext.html"
78	><tt class="module">gettext</tt> module</a> for more
79	information on this convention.</span>
80
81	<P>
82	</DD>
83	<DT><STRONG><code>__*__</code></STRONG></DT>
84	<DD>System-defined names. These names are defined by the interpreter
85	and its implementation (including the standard library);
86	applications should not expect to define additional names using this
87	convention. The set of names of this class defined by Python may be
88	extended in future versions.
89	See section <A href="specialnames.html#specialnames">3.3</A>, ``Special method names.''
90
91	<P>
92	</DD>
93	<DT><STRONG><code>__*</code></STRONG></DT>
94	<DD>Class-private names. Names in this category, when used within the
95	context of a class definition, are re-written to use a mangled form
96	to help avoid name clashes between ``private'' attributes of base
97	and derived classes.
98	See section <A href="atom-identifiers.html#atom-identifiers">5.2.1</A>, ``Identifiers (Names).''
99
100	<P>
101	</DD>
102	</DL>
103
104	<P>
105
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