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  <div class="section" id="module-tabnanny">
<span id="tabnanny-detection-of-ambiguous-indentation"></span><h1>31.8. <a class="reference internal" href="#module-tabnanny" title="tabnanny: Tool for detecting white space related problems in Python source files in a directory tree."><tt class="xref py py-mod docutils literal"><span class="pre">tabnanny</span></tt></a> &#8212; 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="http://hg.python.org/cpython/file/2.7/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"><tt class="xref py py-func docutils literal"><span class="pre">check()</span></tt></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">
<tt class="descclassname">tabnanny.</tt><tt class="descname">check</tt><big>(</big><em>file_or_dir</em><big>)</big><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 <tt class="file docutils literal"><span class="pre">.py</span></tt>
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 print statement.</p>
</dd></dl>

<dl class="data">
<dt id="tabnanny.verbose">
<tt class="descclassname">tabnanny.</tt><tt class="descname">verbose</tt><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
<tt class="docutils literal"><span class="pre">-v</span></tt> option if called as a script.</p>
</dd></dl>

<dl class="data">
<dt id="tabnanny.filename_only">
<tt class="descclassname">tabnanny.</tt><tt class="descname">filename_only</tt><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 <tt class="docutils literal"><span class="pre">-q</span></tt> option if called
as a script.</p>
</dd></dl>

<dl class="exception">
<dt id="tabnanny.NannyNag">
<em class="property">exception </em><tt class="descclassname">tabnanny.</tt><tt class="descname">NannyNag</tt><a class="headerlink" href="#tabnanny.NannyNag" title="Permalink to this definition">¶</a></dt>
<dd><p>Raised by <a class="reference internal" href="#tabnanny.tokeneater" title="tabnanny.tokeneater"><tt class="xref py py-func docutils literal"><span class="pre">tokeneater()</span></tt></a> if detecting an ambiguous indent. Captured and
handled in <a class="reference internal" href="#tabnanny.check" title="tabnanny.check"><tt class="xref py py-func docutils literal"><span class="pre">check()</span></tt></a>.</p>
</dd></dl>

<dl class="function">
<dt id="tabnanny.tokeneater">
<tt class="descclassname">tabnanny.</tt><tt class="descname">tokeneater</tt><big>(</big><em>type</em>, <em>token</em>, <em>start</em>, <em>end</em>, <em>line</em><big>)</big><a class="headerlink" href="#tabnanny.tokeneater" title="Permalink to this definition">¶</a></dt>
<dd><p>This function is used by <a class="reference internal" href="#tabnanny.check" title="tabnanny.check"><tt class="xref py py-func docutils literal"><span class="pre">check()</span></tt></a> as a callback parameter to the function
<a class="reference internal" href="tokenize.html#tokenize.tokenize" title="tokenize.tokenize"><tt class="xref py py-func docutils literal"><span class="pre">tokenize.tokenize()</span></tt></a>.</p>
</dd></dl>

<div class="admonition-see-also 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."><tt class="xref py py-mod docutils literal"><span class="pre">tokenize</span></tt></a></dt>
<dd>Lexical scanner for Python source code.</dd>
</dl>
</div>
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