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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="X-UA-Compatible" content="IE=Edge" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>32.8. tabnanny — Detection of ambiguous indentation — Python 3.6.7 documentation</title> <link rel="stylesheet" href="../_static/pydoctheme.css" type="text/css" /> <link rel="stylesheet" href="../_static/pygments.css" type="text/css" /> <script type="text/javascript" id="documentation_options" data-url_root="../" src="../_static/documentation_options.js"></script> <script type="text/javascript" src="../_static/jquery.js"></script> <script type="text/javascript" src="../_static/underscore.js"></script> <script type="text/javascript" src="../_static/doctools.js"></script> <script type="text/javascript" src="../_static/sidebar.js"></script> <link rel="search" type="application/opensearchdescription+xml" title="Search within Python 3.6.7 documentation" href="../_static/opensearch.xml"/> <link rel="author" title="About these documents" href="../about.html" /> <link rel="index" title="Index" href="../genindex.html" /> <link rel="search" title="Search" href="../search.html" /> <link rel="copyright" title="Copyright" href="../copyright.html" /> <link rel="next" title="32.9. pyclbr — Python class browser support" href="pyclbr.html" /> <link rel="prev" title="32.7. tokenize — Tokenizer for Python source" href="tokenize.html" /> <link rel="shortcut icon" type="image/png" href="../_static/py.png" /> <link rel="canonical" href="https://docs.python.org/3/library/tabnanny.html" /> <script type="text/javascript" src="../_static/copybutton.js"></script> </head><body> <div class="related" role="navigation" aria-label="related navigation"> <h3>Navigation</h3> <ul> <li class="right" style="margin-right: 10px"> <a href="../genindex.html" title="General Index" accesskey="I">index</a></li> <li class="right" > <a href="../py-modindex.html" title="Python Module Index" >modules</a> |</li> <li class="right" > <a href="pyclbr.html" title="32.9. pyclbr — Python class browser support" accesskey="N">next</a> |</li> <li class="right" > <a href="tokenize.html" title="32.7. tokenize — Tokenizer for Python source" accesskey="P">previous</a> |</li> <li><img src="../_static/py.png" alt="" style="vertical-align: middle; margin-top: -1px"/></li> <li><a href="https://www.python.org/">Python</a> »</li> <li> <a href="../index.html">3.6.7 Documentation</a> » </li> <li class="nav-item nav-item-1"><a href="index.html" >The Python Standard Library</a> »</li> <li class="nav-item nav-item-2"><a href="language.html" accesskey="U">32. Python Language Services</a> »</li> <li class="right"> <div class="inline-search" style="display: none" role="search"> <form class="inline-search" action="../search.html" method="get"> <input placeholder="Quick search" type="text" name="q" /> <input type="submit" value="Go" /> <input type="hidden" name="check_keywords" value="yes" /> <input type="hidden" name="area" value="default" /> </form> </div> <script type="text/javascript">$('.inline-search').show(0);</script> | </li> </ul> </div> <div class="document"> <div class="documentwrapper"> <div class="bodywrapper"> <div class="body" role="main"> <div class="section" id="module-tabnanny"> <span id="tabnanny-detection-of-ambiguous-indentation"></span><h1>32.8. <a class="reference internal" href="#module-tabnanny" title="tabnanny: Tool for detecting white space related problems in Python source files in a directory tree."><code class="xref py py-mod docutils literal notranslate"><span class="pre">tabnanny</span></code></a> — Detection of ambiguous indentation<a class="headerlink" href="#module-tabnanny" title="Permalink to this headline">¶</a></h1> <p><strong>Source code:</strong> <a class="reference external" href="https://github.com/python/cpython/tree/3.6/Lib/tabnanny.py">Lib/tabnanny.py</a></p> <hr class="docutils" /> <p>For the time being this module is intended to be called as a script. However it is possible to import it into an IDE and use the function <a class="reference internal" href="#tabnanny.check" title="tabnanny.check"><code class="xref py py-func docutils literal notranslate"><span class="pre">check()</span></code></a> described below.</p> <div class="admonition note"> <p class="first admonition-title">Note</p> <p class="last">The API provided by this module is likely to change in future releases; such changes may not be backward compatible.</p> </div> <dl class="function"> <dt id="tabnanny.check"> <code class="descclassname">tabnanny.</code><code class="descname">check</code><span class="sig-paren">(</span><em>file_or_dir</em><span class="sig-paren">)</span><a class="headerlink" href="#tabnanny.check" title="Permalink to this definition">¶</a></dt> <dd><p>If <em>file_or_dir</em> is a directory and not a symbolic link, then recursively descend the directory tree named by <em>file_or_dir</em>, checking all <code class="file docutils literal notranslate"><span class="pre">.py</span></code> files along the way. If <em>file_or_dir</em> is an ordinary Python source file, it is checked for whitespace related problems. The diagnostic messages are written to standard output using the <a class="reference internal" href="functions.html#print" title="print"><code class="xref py py-func docutils literal notranslate"><span class="pre">print()</span></code></a> function.</p> </dd></dl> <dl class="data"> <dt id="tabnanny.verbose"> <code class="descclassname">tabnanny.</code><code class="descname">verbose</code><a class="headerlink" href="#tabnanny.verbose" title="Permalink to this definition">¶</a></dt> <dd><p>Flag indicating whether to print verbose messages. This is incremented by the <code class="docutils literal notranslate"><span class="pre">-v</span></code> option if called as a script.</p> </dd></dl> <dl class="data"> <dt id="tabnanny.filename_only"> <code class="descclassname">tabnanny.</code><code class="descname">filename_only</code><a class="headerlink" href="#tabnanny.filename_only" title="Permalink to this definition">¶</a></dt> <dd><p>Flag indicating whether to print only the filenames of files containing whitespace related problems. This is set to true by the <code class="docutils literal notranslate"><span class="pre">-q</span></code> option if called as a script.</p> </dd></dl> <dl class="exception"> <dt id="tabnanny.NannyNag"> <em class="property">exception </em><code class="descclassname">tabnanny.</code><code class="descname">NannyNag</code><a class="headerlink" href="#tabnanny.NannyNag" title="Permalink to this definition">¶</a></dt> <dd><p>Raised by <a class="reference internal" href="#tabnanny.process_tokens" title="tabnanny.process_tokens"><code class="xref py py-func docutils literal notranslate"><span class="pre">process_tokens()</span></code></a> if detecting an ambiguous indent. Captured and handled in <a class="reference internal" href="#tabnanny.check" title="tabnanny.check"><code class="xref py py-func docutils literal notranslate"><span class="pre">check()</span></code></a>.</p> </dd></dl> <dl class="function"> <dt id="tabnanny.process_tokens"> <code class="descclassname">tabnanny.</code><code class="descname">process_tokens</code><span class="sig-paren">(</span><em>tokens</em><span class="sig-paren">)</span><a class="headerlink" href="#tabnanny.process_tokens" title="Permalink to this definition">¶</a></dt> <dd><p>This function is used by <a class="reference internal" href="#tabnanny.check" title="tabnanny.check"><code class="xref py py-func docutils literal notranslate"><span class="pre">check()</span></code></a> to process tokens generated by the <a class="reference internal" href="tokenize.html#module-tokenize" title="tokenize: Lexical scanner for Python source code."><code class="xref py py-mod docutils literal notranslate"><span class="pre">tokenize</span></code></a> module.</p> </dd></dl> <div class="admonition seealso"> <p class="first admonition-title">See also</p> <dl class="last docutils"> <dt>Module <a class="reference internal" href="tokenize.html#module-tokenize" title="tokenize: Lexical scanner for Python source code."><code class="xref py py-mod docutils literal notranslate"><span class="pre">tokenize</span></code></a></dt> <dd>Lexical scanner for Python source code.</dd> </dl> </div> </div> </div> </div> </div> <div class="sphinxsidebar" role="navigation" aria-label="main navigation"> <div class="sphinxsidebarwrapper"> <h4>Previous topic</h4> <p class="topless"><a href="tokenize.html" title="previous chapter">32.7. <code class="docutils literal notranslate"><span class="pre">tokenize</span></code> — Tokenizer for Python source</a></p> <h4>Next topic</h4> <p class="topless"><a href="pyclbr.html" title="next chapter">32.9. <code class="docutils literal notranslate"><span class="pre">pyclbr</span></code> — Python class browser support</a></p> <div role="note" aria-label="source link"> <h3>This Page</h3> <ul class="this-page-menu"> <li><a href="../bugs.html">Report a Bug</a></li> <li> <a href="https://github.com/python/cpython/blob/3.6/Doc/library/tabnanny.rst" rel="nofollow">Show Source </a> </li> </ul> </div> </div> </div> <div class="clearer"></div> </div> <div class="related" role="navigation" aria-label="related navigation"> <h3>Navigation</h3> <ul> <li class="right" style="margin-right: 10px"> <a href="../genindex.html" title="General Index" >index</a></li> <li class="right" > <a href="../py-modindex.html" title="Python Module Index" >modules</a> |</li> <li class="right" > <a href="pyclbr.html" title="32.9. pyclbr — Python class browser support" >next</a> |</li> <li class="right" > <a href="tokenize.html" title="32.7. tokenize — Tokenizer for Python source" >previous</a> |</li> <li><img src="../_static/py.png" alt="" style="vertical-align: middle; margin-top: -1px"/></li> <li><a href="https://www.python.org/">Python</a> »</li> <li> <a href="../index.html">3.6.7 Documentation</a> » </li> <li class="nav-item nav-item-1"><a href="index.html" >The Python Standard Library</a> »</li> <li class="nav-item nav-item-2"><a href="language.html" >32. 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