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  <div class="section" id="module-token">
<span id="token-constants-used-with-python-parse-trees"></span><h1><a class="reference internal" href="#module-token" title="token: Constants representing terminal nodes of the parse tree."><code class="xref py py-mod docutils literal notranslate"><span class="pre">token</span></code></a> — Constants used with Python parse trees<a class="headerlink" href="#module-token" title="Permalink to this headline">¶</a></h1>
<p><strong>Source code:</strong> <a class="reference external" href="https://github.com/python/cpython/tree/3.7/Lib/token.py">Lib/token.py</a></p>
<hr class="docutils" />
<p>This module provides constants which represent the numeric values of leaf nodes
of the parse tree (terminal tokens).  Refer to the file <code class="file docutils literal notranslate"><span class="pre">Grammar/Grammar</span></code>
in the Python distribution for the definitions of the names in the context of
the language grammar.  The specific numeric values which the names map to may
change between Python versions.</p>
<p>The module also provides a mapping from numeric codes to names and some
functions.  The functions mirror definitions in the Python C header files.</p>
<dl class="data">
<dt id="token.tok_name">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">tok_name</code><a class="headerlink" href="#token.tok_name" title="Permalink to this definition">¶</a></dt>
<dd><p>Dictionary mapping the numeric values of the constants defined in this module
back to name strings, allowing more human-readable representation of parse trees
to be generated.</p>
</dd></dl>

<dl class="function">
<dt id="token.ISTERMINAL">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">ISTERMINAL</code><span class="sig-paren">(</span><em class="sig-param">x</em><span class="sig-paren">)</span><a class="headerlink" href="#token.ISTERMINAL" title="Permalink to this definition">¶</a></dt>
<dd><p>Return <code class="docutils literal notranslate"><span class="pre">True</span></code> for terminal token values.</p>
</dd></dl>

<dl class="function">
<dt id="token.ISNONTERMINAL">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">ISNONTERMINAL</code><span class="sig-paren">(</span><em class="sig-param">x</em><span class="sig-paren">)</span><a class="headerlink" href="#token.ISNONTERMINAL" title="Permalink to this definition">¶</a></dt>
<dd><p>Return <code class="docutils literal notranslate"><span class="pre">True</span></code> for non-terminal token values.</p>
</dd></dl>

<dl class="function">
<dt id="token.ISEOF">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">ISEOF</code><span class="sig-paren">(</span><em class="sig-param">x</em><span class="sig-paren">)</span><a class="headerlink" href="#token.ISEOF" title="Permalink to this definition">¶</a></dt>
<dd><p>Return <code class="docutils literal notranslate"><span class="pre">True</span></code> if <em>x</em> is the marker indicating the end of input.</p>
</dd></dl>

<p>The token constants are:</p>
<dl class="data">
<dt id="token.ENDMARKER">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">ENDMARKER</code><a class="headerlink" href="#token.ENDMARKER" title="Permalink to this definition">¶</a></dt>
<dt id="token.NAME">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">NAME</code><a class="headerlink" href="#token.NAME" title="Permalink to this definition">¶</a></dt>
<dt id="token.NUMBER">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">NUMBER</code><a class="headerlink" href="#token.NUMBER" title="Permalink to this definition">¶</a></dt>
<dt id="token.STRING">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">STRING</code><a class="headerlink" href="#token.STRING" title="Permalink to this definition">¶</a></dt>
<dt id="token.NEWLINE">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">NEWLINE</code><a class="headerlink" href="#token.NEWLINE" title="Permalink to this definition">¶</a></dt>
<dt id="token.INDENT">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">INDENT</code><a class="headerlink" href="#token.INDENT" title="Permalink to this definition">¶</a></dt>
<dt id="token.DEDENT">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">DEDENT</code><a class="headerlink" href="#token.DEDENT" title="Permalink to this definition">¶</a></dt>
<dt id="token.LPAR">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">LPAR</code><a class="headerlink" href="#token.LPAR" title="Permalink to this definition">¶</a></dt>
<dt id="token.RPAR">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">RPAR</code><a class="headerlink" href="#token.RPAR" title="Permalink to this definition">¶</a></dt>
<dt id="token.LSQB">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">LSQB</code><a class="headerlink" href="#token.LSQB" title="Permalink to this definition">¶</a></dt>
<dt id="token.RSQB">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">RSQB</code><a class="headerlink" href="#token.RSQB" title="Permalink to this definition">¶</a></dt>
<dt id="token.COLON">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">COLON</code><a class="headerlink" href="#token.COLON" title="Permalink to this definition">¶</a></dt>
<dt id="token.COMMA">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">COMMA</code><a class="headerlink" href="#token.COMMA" title="Permalink to this definition">¶</a></dt>
<dt id="token.SEMI">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">SEMI</code><a class="headerlink" href="#token.SEMI" title="Permalink to this definition">¶</a></dt>
<dt id="token.PLUS">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">PLUS</code><a class="headerlink" href="#token.PLUS" title="Permalink to this definition">¶</a></dt>
<dt id="token.MINUS">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">MINUS</code><a class="headerlink" href="#token.MINUS" title="Permalink to this definition">¶</a></dt>
<dt id="token.STAR">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">STAR</code><a class="headerlink" href="#token.STAR" title="Permalink to this definition">¶</a></dt>
<dt id="token.SLASH">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">SLASH</code><a class="headerlink" href="#token.SLASH" title="Permalink to this definition">¶</a></dt>
<dt id="token.VBAR">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">VBAR</code><a class="headerlink" href="#token.VBAR" title="Permalink to this definition">¶</a></dt>
<dt id="token.AMPER">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">AMPER</code><a class="headerlink" href="#token.AMPER" title="Permalink to this definition">¶</a></dt>
<dt id="token.LESS">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">LESS</code><a class="headerlink" href="#token.LESS" title="Permalink to this definition">¶</a></dt>
<dt id="token.GREATER">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">GREATER</code><a class="headerlink" href="#token.GREATER" title="Permalink to this definition">¶</a></dt>
<dt id="token.EQUAL">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">EQUAL</code><a class="headerlink" href="#token.EQUAL" title="Permalink to this definition">¶</a></dt>
<dt id="token.DOT">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">DOT</code><a class="headerlink" href="#token.DOT" title="Permalink to this definition">¶</a></dt>
<dt id="token.PERCENT">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">PERCENT</code><a class="headerlink" href="#token.PERCENT" title="Permalink to this definition">¶</a></dt>
<dt id="token.LBRACE">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">LBRACE</code><a class="headerlink" href="#token.LBRACE" title="Permalink to this definition">¶</a></dt>
<dt id="token.RBRACE">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">RBRACE</code><a class="headerlink" href="#token.RBRACE" title="Permalink to this definition">¶</a></dt>
<dt id="token.EQEQUAL">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">EQEQUAL</code><a class="headerlink" href="#token.EQEQUAL" title="Permalink to this definition">¶</a></dt>
<dt id="token.NOTEQUAL">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">NOTEQUAL</code><a class="headerlink" href="#token.NOTEQUAL" title="Permalink to this definition">¶</a></dt>
<dt id="token.LESSEQUAL">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">LESSEQUAL</code><a class="headerlink" href="#token.LESSEQUAL" title="Permalink to this definition">¶</a></dt>
<dt id="token.GREATEREQUAL">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">GREATEREQUAL</code><a class="headerlink" href="#token.GREATEREQUAL" title="Permalink to this definition">¶</a></dt>
<dt id="token.TILDE">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">TILDE</code><a class="headerlink" href="#token.TILDE" title="Permalink to this definition">¶</a></dt>
<dt id="token.CIRCUMFLEX">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">CIRCUMFLEX</code><a class="headerlink" href="#token.CIRCUMFLEX" title="Permalink to this definition">¶</a></dt>
<dt id="token.LEFTSHIFT">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">LEFTSHIFT</code><a class="headerlink" href="#token.LEFTSHIFT" title="Permalink to this definition">¶</a></dt>
<dt id="token.RIGHTSHIFT">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">RIGHTSHIFT</code><a class="headerlink" href="#token.RIGHTSHIFT" title="Permalink to this definition">¶</a></dt>
<dt id="token.DOUBLESTAR">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">DOUBLESTAR</code><a class="headerlink" href="#token.DOUBLESTAR" title="Permalink to this definition">¶</a></dt>
<dt id="token.PLUSEQUAL">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">PLUSEQUAL</code><a class="headerlink" href="#token.PLUSEQUAL" title="Permalink to this definition">¶</a></dt>
<dt id="token.MINEQUAL">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">MINEQUAL</code><a class="headerlink" href="#token.MINEQUAL" title="Permalink to this definition">¶</a></dt>
<dt id="token.STAREQUAL">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">STAREQUAL</code><a class="headerlink" href="#token.STAREQUAL" title="Permalink to this definition">¶</a></dt>
<dt id="token.SLASHEQUAL">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">SLASHEQUAL</code><a class="headerlink" href="#token.SLASHEQUAL" title="Permalink to this definition">¶</a></dt>
<dt id="token.PERCENTEQUAL">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">PERCENTEQUAL</code><a class="headerlink" href="#token.PERCENTEQUAL" title="Permalink to this definition">¶</a></dt>
<dt id="token.AMPEREQUAL">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">AMPEREQUAL</code><a class="headerlink" href="#token.AMPEREQUAL" title="Permalink to this definition">¶</a></dt>
<dt id="token.VBAREQUAL">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">VBAREQUAL</code><a class="headerlink" href="#token.VBAREQUAL" title="Permalink to this definition">¶</a></dt>
<dt id="token.CIRCUMFLEXEQUAL">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">CIRCUMFLEXEQUAL</code><a class="headerlink" href="#token.CIRCUMFLEXEQUAL" title="Permalink to this definition">¶</a></dt>
<dt id="token.LEFTSHIFTEQUAL">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">LEFTSHIFTEQUAL</code><a class="headerlink" href="#token.LEFTSHIFTEQUAL" title="Permalink to this definition">¶</a></dt>
<dt id="token.RIGHTSHIFTEQUAL">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">RIGHTSHIFTEQUAL</code><a class="headerlink" href="#token.RIGHTSHIFTEQUAL" title="Permalink to this definition">¶</a></dt>
<dt id="token.DOUBLESTAREQUAL">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">DOUBLESTAREQUAL</code><a class="headerlink" href="#token.DOUBLESTAREQUAL" title="Permalink to this definition">¶</a></dt>
<dt id="token.DOUBLESLASH">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">DOUBLESLASH</code><a class="headerlink" href="#token.DOUBLESLASH" title="Permalink to this definition">¶</a></dt>
<dt id="token.DOUBLESLASHEQUAL">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">DOUBLESLASHEQUAL</code><a class="headerlink" href="#token.DOUBLESLASHEQUAL" title="Permalink to this definition">¶</a></dt>
<dt id="token.AT">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">AT</code><a class="headerlink" href="#token.AT" title="Permalink to this definition">¶</a></dt>
<dt id="token.ATEQUAL">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">ATEQUAL</code><a class="headerlink" href="#token.ATEQUAL" title="Permalink to this definition">¶</a></dt>
<dt id="token.RARROW">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">RARROW</code><a class="headerlink" href="#token.RARROW" title="Permalink to this definition">¶</a></dt>
<dt id="token.ELLIPSIS">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">ELLIPSIS</code><a class="headerlink" href="#token.ELLIPSIS" title="Permalink to this definition">¶</a></dt>
<dt id="token.OP">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">OP</code><a class="headerlink" href="#token.OP" title="Permalink to this definition">¶</a></dt>
<dt id="token.ERRORTOKEN">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">ERRORTOKEN</code><a class="headerlink" href="#token.ERRORTOKEN" title="Permalink to this definition">¶</a></dt>
<dt id="token.N_TOKENS">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">N_TOKENS</code><a class="headerlink" href="#token.N_TOKENS" title="Permalink to this definition">¶</a></dt>
<dt id="token.NT_OFFSET">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">NT_OFFSET</code><a class="headerlink" href="#token.NT_OFFSET" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>

<p>The following token type values aren’t used by the C tokenizer but are needed for
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>
<dl class="data">
<dt id="token.COMMENT">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">COMMENT</code><a class="headerlink" href="#token.COMMENT" title="Permalink to this definition">¶</a></dt>
<dd><p>Token value used to indicate a comment.</p>
</dd></dl>

<dl class="data">
<dt id="token.NL">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">NL</code><a class="headerlink" href="#token.NL" title="Permalink to this definition">¶</a></dt>
<dd><p>Token value used to indicate a non-terminating newline.  The
<a class="reference internal" href="#token.NEWLINE" title="token.NEWLINE"><code class="xref py py-data docutils literal notranslate"><span class="pre">NEWLINE</span></code></a> token indicates the end of a logical line of Python code;
<code class="docutils literal notranslate"><span class="pre">NL</span></code> tokens are generated when a logical line of code is continued over
multiple physical lines.</p>
</dd></dl>

<dl class="data">
<dt id="token.ENCODING">
<code class="sig-prename descclassname">token.</code><code class="sig-name descname">ENCODING</code><a class="headerlink" href="#token.ENCODING" title="Permalink to this definition">¶</a></dt>
<dd><p>Token value that indicates the encoding used to decode the source bytes
into text. The first token returned by <a class="reference internal" href="tokenize.html#tokenize.tokenize" title="tokenize.tokenize"><code class="xref py py-func docutils literal notranslate"><span class="pre">tokenize.tokenize()</span></code></a> will
always be an <code class="docutils literal notranslate"><span class="pre">ENCODING</span></code> token.</p>
</dd></dl>

<div class="versionchanged">
<p><span class="versionmodified changed">Changed in version 3.5: </span>Added <code class="xref py py-data docutils literal notranslate"><span class="pre">AWAIT</span></code> and <code class="xref py py-data docutils literal notranslate"><span class="pre">ASYNC</span></code> tokens.</p>
</div>
<div class="versionchanged">
<p><span class="versionmodified changed">Changed in version 3.7: </span>Added <a class="reference internal" href="#token.COMMENT" title="token.COMMENT"><code class="xref py py-data docutils literal notranslate"><span class="pre">COMMENT</span></code></a>, <a class="reference internal" href="#token.NL" title="token.NL"><code class="xref py py-data docutils literal notranslate"><span class="pre">NL</span></code></a> and <a class="reference internal" href="#token.ENCODING" title="token.ENCODING"><code class="xref py py-data docutils literal notranslate"><span class="pre">ENCODING</span></code></a> tokens.</p>
</div>
<div class="versionchanged">
<p><span class="versionmodified changed">Changed in version 3.7: </span>Removed <code class="xref py py-data docutils literal notranslate"><span class="pre">AWAIT</span></code> and <code class="xref py py-data docutils literal notranslate"><span class="pre">ASYNC</span></code> tokens. “async” and “await” are
now tokenized as <a class="reference internal" href="#token.NAME" title="token.NAME"><code class="xref py py-data docutils literal notranslate"><span class="pre">NAME</span></code></a> tokens.</p>
</div>
</div>


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