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<section id="subprocess-types-table">
<span id="subproc-types"></span><h1>Subprocess Types Table<a class="headerlink" href="#subprocess-types-table" title="Link to this heading">¶</a></h1>
<p>Xonsh has a few different ways to launch subprocesses, each with their own
unique interface depending on your need. The following table is a quick reference
for the different suprocesses. The columns have the following meaning:</p>
<dl class="field-list simple">
<dt class="field-odd">Type<span class="colon">:</span></dt>
<dd class="field-odd"><p>The syntax for an example subprocess <code class="docutils literal notranslate"><span class="pre">cmd</span></code>.</p>
</dd>
<dt class="field-even">Output<span class="colon">:</span></dt>
<dd class="field-even"><p>Whether the output is streamed to stdout/stderr. If “captured”, the output is
not streamed as the <code class="docutils literal notranslate"><span class="pre">cmd</span></code> runs. If “uncaptured”, the output is streamed.</p>
</dd>
<dt class="field-odd">Returns<span class="colon">:</span></dt>
<dd class="field-odd"><p>The type of the object returned by the subprocess executions. For example,
if you were to run <code class="docutils literal notranslate"><span class="pre">p</span> <span class="pre">=</span> <span class="pre">$(cmd)</span></code>, the return column gives the type of <code class="docutils literal notranslate"><span class="pre">p</span></code>.</p>
</dd>
<dt class="field-even">Notes<span class="colon">:</span></dt>
<dd class="field-even"><p>Any comments about the subprocess.</p>
</dd>
</dl>
<div class="table-wrapper docutils container">
<table class="docutils align-center">
<thead>
<tr class="row-odd"><th class="head"><p>Type</p></th>
<th class="head"><p>Output</p></th>
<th class="head"><p>Returns</p></th>
<th class="head"><p>Notes</p></th>
</tr>
</thead>
<tbody>
<tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">cmd</span></code></p></td>
<td><p>Uncaptured</p></td>
<td><p><code class="docutils literal notranslate"><span class="pre">HiddenCommandPipeline</span></code></p></td>
<td><p>The same as <code class="docutils literal notranslate"><span class="pre">![cmd]</span></code></p></td>
</tr>
<tr class="row-odd"><td><p><code class="docutils literal notranslate"><span class="pre">![cmd]</span></code></p></td>
<td><p>Uncaptured</p></td>
<td><p><code class="docutils literal notranslate"><span class="pre">HiddenCommandPipeline</span></code></p></td>
<td></td>
</tr>
<tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">$[cmd]</span></code></p></td>
<td><p>Uncaptured</p></td>
<td><p><code class="docutils literal notranslate"><span class="pre">None</span></code></p></td>
<td></td>
</tr>
<tr class="row-odd"><td><p><code class="docutils literal notranslate"><span class="pre">!(cmd)</span></code></p></td>
<td><p>Captured</p></td>
<td><p><code class="docutils literal notranslate"><span class="pre">CommandPipeline</span></code></p></td>
<td></td>
</tr>
<tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">$(cmd)</span></code></p></td>
<td><p>Captured</p></td>
<td><p><code class="docutils literal notranslate"><span class="pre">str</span></code></p></td>
<td><p>stdout is returned</p></td>
</tr>
</tbody>
</table>
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