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<div class="section" id="glossary">
<span id="id1"></span><h1>Glossary<a class="headerlink" href="#glossary" title="Permalink to this headline">¶</a></h1>
<dl class="glossary docutils">
<dt id="term-"><tt class="docutils literal"><span class="pre">>>></span></tt></dt>
<dd>The default Python prompt of the interactive shell. Often seen for code
examples which can be executed interactively in the interpreter.</dd>
<dt id="term-1"><tt class="docutils literal"><span class="pre">...</span></tt></dt>
<dd>The default Python prompt of the interactive shell when entering code for
an indented code block or within a pair of matching left and right
delimiters (parentheses, square brackets or curly braces).</dd>
<dt id="term-to3">2to3</dt>
<dd><p class="first">A tool that tries to convert Python 2.x code to Python 3.x code by
handling most of the incompatibilities which can be detected by parsing the
source and traversing the parse tree.</p>
<p class="last">2to3 is available in the standard library as <a class="reference internal" href="library/2to3.html#module-lib2to3" title="lib2to3: the 2to3 library"><tt class="xref py py-mod docutils literal"><span class="pre">lib2to3</span></tt></a>; a standalone
entry point is provided as <tt class="file docutils literal"><span class="pre">Tools/scripts/2to3</span></tt>. See
<a class="reference internal" href="library/2to3.html#to3-reference"><em>2to3 - Automated Python 2 to 3 code translation</em></a>.</p>
</dd>
<dt id="term-abstract-base-class">abstract base class</dt>
<dd>Abstract base classes complement <a class="reference internal" href="#term-duck-typing"><em class="xref std std-term">duck-typing</em></a> by
providing a way to define interfaces when other techniques like
<a class="reference internal" href="library/functions.html#hasattr" title="hasattr"><tt class="xref py py-func docutils literal"><span class="pre">hasattr()</span></tt></a> would be clumsy or subtly wrong (for example with
<a class="reference internal" href="reference/datamodel.html#special-lookup"><em>magic methods</em></a>). ABCs introduce virtual
subclasses, which are classes that don’t inherit from a class but are
still recognized by <a class="reference internal" href="library/functions.html#isinstance" title="isinstance"><tt class="xref py py-func docutils literal"><span class="pre">isinstance()</span></tt></a> and <a class="reference internal" href="library/functions.html#issubclass" title="issubclass"><tt class="xref py py-func docutils literal"><span class="pre">issubclass()</span></tt></a>; see the
<a class="reference internal" href="library/abc.html#module-abc" title="abc: Abstract base classes according to PEP 3119."><tt class="xref py py-mod docutils literal"><span class="pre">abc</span></tt></a> module documentation. Python comes with many built-in ABCs for
data structures (in the <a class="reference internal" href="library/collections.abc.html#module-collections.abc" title="collections.abc: Abstract base classes for containers"><tt class="xref py py-mod docutils literal"><span class="pre">collections.abc</span></tt></a> module), numbers (in the
<a class="reference internal" href="library/numbers.html#module-numbers" title="numbers: Numeric abstract base classes (Complex, Real, Integral, etc.)."><tt class="xref py py-mod docutils literal"><span class="pre">numbers</span></tt></a> module), streams (in the <a class="reference internal" href="library/io.html#module-io" title="io: Core tools for working with streams."><tt class="xref py py-mod docutils literal"><span class="pre">io</span></tt></a> module), import finders
and loaders (in the <a class="reference internal" href="library/importlib.html#module-importlib.abc" title="importlib.abc: Abstract base classes related to import"><tt class="xref py py-mod docutils literal"><span class="pre">importlib.abc</span></tt></a> module). You can create your own
ABCs with the <a class="reference internal" href="library/abc.html#module-abc" title="abc: Abstract base classes according to PEP 3119."><tt class="xref py py-mod docutils literal"><span class="pre">abc</span></tt></a> module.</dd>
<dt id="term-argument">argument</dt>
<dd><p class="first">A value passed to a <a class="reference internal" href="#term-function"><em class="xref std std-term">function</em></a> (or <a class="reference internal" href="#term-method"><em class="xref std std-term">method</em></a>) when calling the
function. There are two kinds of argument:</p>
<ul>
<li><p class="first"><em class="dfn">keyword argument</em>: an argument preceded by an identifier (e.g.
<tt class="docutils literal"><span class="pre">name=</span></tt>) in a function call or passed as a value in a dictionary
preceded by <tt class="docutils literal"><span class="pre">**</span></tt>. For example, <tt class="docutils literal"><span class="pre">3</span></tt> and <tt class="docutils literal"><span class="pre">5</span></tt> are both keyword
arguments in the following calls to <a class="reference internal" href="library/functio
python参考手册（中文，包含2和3）
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