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<span id="dummy-thread-drop-in-replacement-for-the-thread-module"></span><h1>16.5. <a class="reference internal" href="#module-dummy_thread" title="dummy_thread: Drop-in replacement for the thread module."><tt class="xref py py-mod docutils literal"><span class="pre">dummy_thread</span></tt></a> — Drop-in replacement for the <a class="reference internal" href="thread.html#module-thread" title="thread: Create multiple threads of control within one interpreter."><tt class="xref py py-mod docutils literal"><span class="pre">thread</span></tt></a> module<a class="headerlink" href="#module-dummy_thread" title="Permalink to this headline">¶</a></h1>
<div class="admonition note">
<p class="first admonition-title">Note</p>
<p class="last">The <a class="reference internal" href="#module-dummy_thread" title="dummy_thread: Drop-in replacement for the thread module."><tt class="xref py py-mod docutils literal"><span class="pre">dummy_thread</span></tt></a> module has been renamed to <tt class="xref py py-mod docutils literal"><span class="pre">_dummy_thread</span></tt> in
Python 3. The <a class="reference internal" href="../glossary.html#term-to3"><em class="xref std std-term">2to3</em></a> tool will automatically adapt imports when
converting your sources to Python 3; however, you should consider using the
high-lever <a class="reference internal" href="dummy_threading.html#module-dummy_threading" title="dummy_threading: Drop-in replacement for the threading module."><tt class="xref py py-mod docutils literal"><span class="pre">dummy_threading</span></tt></a> module instead.</p>
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<p><strong>Source code:</strong> <a class="reference external" href="http://hg.python.org/cpython/file/2.7/Lib/dummy_thread.py">Lib/dummy_thread.py</a></p>
<hr class="docutils" />
<p>This module provides a duplicate interface to the <a class="reference internal" href="thread.html#module-thread" title="thread: Create multiple threads of control within one interpreter."><tt class="xref py py-mod docutils literal"><span class="pre">thread</span></tt></a> module. It is
meant to be imported when the <a class="reference internal" href="thread.html#module-thread" title="thread: Create multiple threads of control within one interpreter."><tt class="xref py py-mod docutils literal"><span class="pre">thread</span></tt></a> module is not provided on a
platform.</p>
<p>Suggested usage is:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="k">try</span><span class="p">:</span>
<span class="kn">import</span> <span class="nn">thread</span> <span class="kn">as</span> <span class="nn">_thread</span>
<span class="k">except</span> <span class="ne">ImportError</span><span class="p">:</span>
<span class="kn">import</span> <span class="nn">dummy_thread</span> <span class="kn">as</span> <span class="nn">_thread</span>
</pre></div>
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<p>Be careful to not use this module where deadlock might occur from a thread
being created that blocks waiting for another thread to be created. This often
occurs with blocking I/O.</p>
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