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<section id="module-codeop">
<span id="codeop-compile-python-code"></span><h1><code class="xref py py-mod docutils literal notranslate"><span class="pre">codeop</span></code> --- Compile Python code<a class="headerlink" href="#module-codeop" title="Link to this heading">¶</a></h1>
<p><strong>Source code:</strong> <a class="extlink-source reference external" href="https://github.com/python/cpython/tree/3.14/Lib/codeop.py">Lib/codeop.py</a></p>
<hr class="docutils" />
<p>The <code class="xref py py-mod docutils literal notranslate"><span class="pre">codeop</span></code> module provides utilities upon which the Python
read-eval-print loop can be emulated, as is done in the <a class="reference internal" href="code.html#module-code" title="code: Facilities to implement read-eval-print loops."><code class="xref py py-mod docutils literal notranslate"><span class="pre">code</span></code></a> module. As
a result, you probably don't want to use the module directly; if you want to
include such a loop in your program you probably want to use the <code class="xref py py-mod docutils literal notranslate"><span class="pre">code</span></code>
module instead.</p>
<p>There are two parts to this job:</p>
<ol class="arabic simple">
<li><p>Being able to tell if a line of input completes a Python statement: in
short, telling whether to print '<code class="docutils literal notranslate"><span class="pre">>>></span></code>' or '<code class="docutils literal notranslate"><span class="pre">...</span></code>' next.</p></li>
<li><p>Remembering which future statements the user has entered, so subsequent
input can be compiled with these in effect.</p></li>
</ol>
<p>The <code class="xref py py-mod docutils literal notranslate"><span class="pre">codeop</span></code> module provides a way of doing each of these things, and a way
of doing them both.</p>
<p>To do just the former:</p>
<dl class="py function">
<dt class="sig sig-object py" id="codeop.compile_command">
<span class="sig-prename descclassname"><span class="pre">codeop.</span></span><span class="sig-name descname"><span class="pre">compile_command</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">source</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">filename</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">'<input>'</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">symbol</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">'single'</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#codeop.compile_command" title="Link to this definition">¶</a></dt>
<dd><p>Tries to compile <em>source</em>, which should be a string of Python code and return a
code object if <em>source</em> is valid Python code. In that case, the filename
attribute of the code object will be <em>filename</em>, which defaults to
<code class="docutils literal notranslate"><span class="pre">'<input>'</span></code>. Returns <code class="docutils literal notranslate"><span class="pre">None</span></code> if <em>source</em> is <em>not</em> valid Python code, but is a
prefix of valid Python code.</p>
<p>If there is a problem with <em>source</em>, an exception will be raised.
<a class="reference internal" href="exceptions.html#SyntaxError" title="SyntaxError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">SyntaxError</span></code></a> is raised if there is invalid Python syntax, and
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<p>The <em>symbol</em> argument determines whether <em>source</em> is compiled as a statement
(<code class="docutils literal notranslate"><span class="pre">'single'</span></code>, the default), as a sequence of <a class="reference internal" href="../glossary.html#term-statement"><span class="xref std std-term">statement</span></a> (<code class="docutils literal notranslate"><span class="pre">'exec'</span></code>) or
as an <a class="reference internal" href="../glossary.html#term-expression"><span class="xref std std-term">expression</span></a> (<code class="docutils literal notranslate"><span class="pre">'eval'</span></code>). Any other value will
cause <a class="reference internal" href="exceptions.html#ValueError" title="ValueError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">ValueError</span></code></a> to be raised.</p>
<div class="admonition note">
<p class="admonition-title">توجه</p>
<p>It is possible (but not likely) that the parser stops parsing with a
successful outcome before reaching the end of the source; in this case,
trailing symbols may be ignored instead of causing an error. For example,
a backslash followed by two newlines may be followed by arbitrary garbage.
This will be fixed once the API for the parser is better.</p>
</div>
</dd></dl>
<dl class="py class">
<dt class="sig sig-object py" id="codeop.Compile">
<em class="property"><span class="k"><span class="pre">class</span></span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">codeop.</span></span><span class="sig-name descname"><span class="pre">Compile</span></span><a class="headerlink" href="#codeop.Compile" title="Link to this definition">¶</a></dt>
<dd><p>Instances of this class have <a class="reference internal" href="../reference/datamodel.html#object.__call__" title="object.__call__"><code class="xref py py-meth docutils literal notranslate"><span class="pre">__call__()</span></code></a> methods identical in signature to
the built-in function <a class="reference internal" href="functions.html#compile" title="compile"><code class="xref py py-func docutils literal notranslate"><span class="pre">compile()</span></code></a>, but with the difference that if the
instance compiles program text containing a <a class="reference internal" href="__future__.html#module-__future__" title="__future__: Future statement definitions"><code class="xref py py-mod docutils literal notranslate"><span class="pre">__future__</span></code></a> statement, the
instance 'remembers' and compiles all subsequent program texts with the
statement in force.</p>
</dd></dl>
<dl class="py class">
<dt class="sig sig-object py" id="codeop.CommandCompiler">
<em class="property"><span class="k"><span class="pre">class</span></span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">codeop.</span></span><span class="sig-name descname"><span class="pre">CommandCompiler</span></span><a class="headerlink" href="#codeop.CommandCompiler" title="Link to this definition">¶</a></dt>
<dd><p>Instances of this class have <a class="reference internal" href="../reference/datamodel.html#object.__call__" title="object.__call__"><code class="xref py py-meth docutils literal notranslate"><span class="pre">__call__()</span></code></a> methods identical in signature to
<a class="reference internal" href="#codeop.compile_command" title="codeop.compile_command"><code class="xref py py-func docutils literal notranslate"><span class="pre">compile_command()</span></code></a>; the difference is that if the instance compiles program
text containing a <a class="reference internal" href="__future__.html#module-__future__" title="__future__: Future statement definitions"><code class="xref py py-mod docutils literal notranslate"><span class="pre">__future__</span></code></a> statement, the instance 'remembers' and
compiles all subsequent program texts with the statement in force.</p>
</dd></dl>
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