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<div class="section" id="module-fnmatch">
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<span id="fnmatch-unix-filename-pattern-matching"></span><h1><a class="reference internal" href="#module-fnmatch" title="fnmatch: Unix shell style filename pattern matching."><code class="xref py py-mod docutils literal notranslate"><span class="pre">fnmatch</span></code></a> — Unix filename pattern matching<a class="headerlink" href="#module-fnmatch" title="Permalink to this headline">¶</a></h1>
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<p><strong>Source code:</strong> <a class="reference external" href="https://github.com/python/cpython/tree/3.7/Lib/fnmatch.py">Lib/fnmatch.py</a></p>
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<span class="target" id="index-0"></span><hr class="docutils" id="index-1" />
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<p>This module provides support for Unix shell-style wildcards, which are <em>not</em> the
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same as regular expressions (which are documented in the <a class="reference internal" href="re.html#module-re" title="re: Regular expression operations."><code class="xref py py-mod docutils literal notranslate"><span class="pre">re</span></code></a> module). The
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special characters used in shell-style wildcards are:</p>
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<table class="docutils align-center" id="index-2">
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<col style="width: 25%" />
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<col style="width: 75%" />
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<thead>
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<tr class="row-odd"><th class="head"><p>Pattern</p></th>
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<th class="head"><p>Meaning</p></th>
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</tr>
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<tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">*</span></code></p></td>
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<td><p>matches everything</p></td>
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</tr>
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<tr class="row-odd"><td><p><code class="docutils literal notranslate"><span class="pre">?</span></code></p></td>
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<td><p>matches any single character</p></td>
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</tr>
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<tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">[seq]</span></code></p></td>
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<td><p>matches any character in <em>seq</em></p></td>
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</tr>
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<tr class="row-odd"><td><p><code class="docutils literal notranslate"><span class="pre">[!seq]</span></code></p></td>
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<td><p>matches any character not in <em>seq</em></p></td>
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</tr>
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</tbody>
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</table>
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<p>For a literal match, wrap the meta-characters in brackets.
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For example, <code class="docutils literal notranslate"><span class="pre">'[?]'</span></code> matches the character <code class="docutils literal notranslate"><span class="pre">'?'</span></code>.</p>
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<p id="index-3">Note that the filename separator (<code class="docutils literal notranslate"><span class="pre">'/'</span></code> on Unix) is <em>not</em> special to this
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module. See module <a class="reference internal" href="glob.html#module-glob" title="glob: Unix shell style pathname pattern expansion."><code class="xref py py-mod docutils literal notranslate"><span class="pre">glob</span></code></a> for pathname expansion (<a class="reference internal" href="glob.html#module-glob" title="glob: Unix shell style pathname pattern expansion."><code class="xref py py-mod docutils literal notranslate"><span class="pre">glob</span></code></a> uses
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<a class="reference internal" href="#fnmatch.filter" title="fnmatch.filter"><code class="xref py py-func docutils literal notranslate"><span class="pre">filter()</span></code></a> to match pathname segments). Similarly, filenames starting with
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a period are not special for this module, and are matched by the <code class="docutils literal notranslate"><span class="pre">*</span></code> and <code class="docutils literal notranslate"><span class="pre">?</span></code>
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patterns.</p>
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<dl class="function">
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<dt id="fnmatch.fnmatch">
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<code class="descclassname">fnmatch.</code><code class="descname">fnmatch</code><span class="sig-paren">(</span><em>filename</em>, <em>pattern</em><span class="sig-paren">)</span><a class="headerlink" href="#fnmatch.fnmatch" title="Permalink to this definition">¶</a></dt>
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<dd><p>Test whether the <em>filename</em> string matches the <em>pattern</em> string, returning
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<a class="reference internal" href="constants.html#True" title="True"><code class="xref py py-const docutils literal notranslate"><span class="pre">True</span></code></a> or <a class="reference internal" href="constants.html#False" title="False"><code class="xref py py-const docutils literal notranslate"><span class="pre">False</span></code></a>. Both parameters are case-normalized
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using <a class="reference internal" href="os.path.html#os.path.normcase" title="os.path.normcase"><code class="xref py py-func docutils literal notranslate"><span class="pre">os.path.normcase()</span></code></a>. <a class="reference internal" href="#fnmatch.fnmatchcase" title="fnmatch.fnmatchcase"><code class="xref py py-func docutils literal notranslate"><span class="pre">fnmatchcase()</span></code></a> can be used to perform a
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case-sensitive comparison, regardless of whether that’s standard for the
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operating system.</p>
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<p>This example will print all file names in the current directory with the
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extension <code class="docutils literal notranslate"><span class="pre">.txt</span></code>:</p>
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<div class="highlight-python3 notranslate"><div class="highlight"><pre><span></span><span class="kn">import</span> <span class="nn">fnmatch</span>
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<span class="kn">import</span> <span class="nn">os</span>
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<span class="k">for</span> <span class="n">file</span> <span class="ow">in</span> <span class="n">os</span><span class="o">.</span><span class="n">listdir</span><span class="p">(</span><span class="s1">'.'</span><span class="p">):</span>
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<span class="k">if</span> <span class="n">fnmatch</span><span class="o">.</span><span class="n">fnmatch</span><span class="p">(</span><span class="n">file</span><span class="p">,</span> <span class="s1">'*.txt'</span><span class="p">):</span>
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<span class="nb">print</span><span class="p">(</span><span class="n">file</span><span class="p">)</span>
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</pre></div>
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</div>
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</dd></dl>
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<dl class="function">
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<dt id="fnmatch.fnmatchcase">
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<code class="descclassname">fnmatch.</code><code class="descname">fnmatchcase</code><span class="sig-paren">(</span><em>filename</em>, <em>pattern</em><span class="sig-paren">)</span><a class="headerlink" href="#fnmatch.fnmatchcase" title="Permalink to this definition">¶</a></dt>
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<dd><p>Test whether <em>filename</em> matches <em>pattern</em>, returning <a class="reference internal" href="constants.html#True" title="True"><code class="xref py py-const docutils literal notranslate"><span class="pre">True</span></code></a> or
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<a class="reference internal" href="constants.html#False" title="False"><code class="xref py py-const docutils literal notranslate"><span class="pre">False</span></code></a>; the comparison is case-sensitive and does not apply
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<a class="reference internal" href="os.path.html#os.path.normcase" title="os.path.normcase"><code class="xref py py-func docutils literal notranslate"><span class="pre">os.path.normcase()</span></code></a>.</p>
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</dd></dl>
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<dl class="function">
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<dt id="fnmatch.filter">
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<code class="descclassname">fnmatch.</code><code class="descname">filter</code><span class="sig-paren">(</span><em>names</em>, <em>pattern</em><span class="sig-paren">)</span><a class="headerlink" href="#fnmatch.filter" title="Permalink to this definition">¶</a></dt>
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<dd><p>Return the subset of the list of <em>names</em> that match <em>pattern</em>. It is the same as
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<code class="docutils literal notranslate"><span class="pre">[n</span> <span class="pre">for</span> <span class="pre">n</span> <span class="pre">in</span> <span class="pre">names</span> <span class="pre">if</span> <span class="pre">fnmatch(n,</span> <span class="pre">pattern)]</span></code>, but implemented more efficiently.</p>
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</dd></dl>
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<dl class="function">
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<dt id="fnmatch.translate">
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<code class="descclassname">fnmatch.</code><code class="descname">translate</code><span class="sig-paren">(</span><em>pattern</em><span class="sig-paren">)</span><a class="headerlink" href="#fnmatch.translate" title="Permalink to this definition">¶</a></dt>
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<dd><p>Return the shell-style <em>pattern</em> converted to a regular expression for
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using with <a class="reference internal" href="re.html#re.match" title="re.match"><code class="xref py py-func docutils literal notranslate"><span class="pre">re.match()</span></code></a>.</p>
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<p>Example:</p>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="kn">import</span> <span class="nn">fnmatch</span><span class="o">,</span> <span class="nn">re</span>
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<span class="go">>>></span>
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<span class="gp">>>> </span><span class="n">regex</span> <span class="o">=</span> <span class="n">fnmatch</span><span class="o">.</span><span class="n">translate</span><span class="p">(</span><span class="s1">'*.txt'</span><span class="p">)</span>
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<span class="gp">>>> </span><span class="n">regex</span>
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<span class="go">'(?s:.*\\.txt)\\Z'</span>
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<span class="gp">>>> </span><span class="n">reobj</span> <span class="o">=</span> <span class="n">re</span><span class="o">.</span><span class="n">compile</span><span class="p">(</span><span class="n">regex</span><span class="p">)</span>
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<span class="gp">>>> </span><span class="n">reobj</span><span class="o">.</span><span class="n">match</span><span class="p">(</span><span class="s1">'foobar.txt'</span><span class="p">)</span>
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<span class="go"><re.Match object; span=(0, 10), match='foobar.txt'></span>
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</pre></div>
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</div>
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<div class="admonition seealso">
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<p class="admonition-title">See also</p>
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<dl class="simple">
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<dt>Module <a class="reference internal" href="glob.html#module-glob" title="glob: Unix shell style pathname pattern expansion."><code class="xref py py-mod docutils literal notranslate"><span class="pre">glob</span></code></a></dt><dd><p>Unix shell-style path expansion.</p>
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</dd>
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