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        Package&nbsp;web2py ::
        <a href="web2py.gluon-module.html">Package&nbsp;gluon</a> ::
        Module&nbsp;html
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<!-- ==================== MODULE DESCRIPTION ==================== -->
<h1 class="epydoc">Module html</h1><span class="codelink"><a href="web2py.gluon.html-pysrc.html">source&nbsp;code</a></span><br /><br />
This file is part of the web2py Web Framework Copyrighted by Massimo 
  Di Pierro &lt;mdipierro@cs.depaul.edu&gt; License: LGPLv3 
  (http://www.gnu.org/licenses/lgpl.html)<br /><br />

<!-- ==================== CLASSES ==================== -->
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<tr class="private">
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.XmlComponent-class.html" class="summary-name">XmlComponent</a><br />
      Abstract root for all Html components
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.XML-class.html" class="summary-name">XML</a><br />
      use it to wrap a string that contains XML/HTML so that it will 
        not be escaped by the template
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.DIV-class.html" class="summary-name">DIV</a><br />
      HTML helper, for easy generating and manipulating a DOM 
        structure.
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.CAT-class.html" class="summary-name">CAT</a>
    </td>
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    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.__TAG__-class.html" class="summary-name">__TAG__</a><br />
      TAG factory example:
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.HTML-class.html" class="summary-name">HTML</a><br />
      There are four predefined document type definitions.
    </td>
  </tr>
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    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.XHTML-class.html" class="summary-name">XHTML</a><br />
      This is XHTML version of the HTML helper.
    </td>
  </tr>
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    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.HEAD-class.html" class="summary-name">HEAD</a>
    </td>
  </tr>
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    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.TITLE-class.html" class="summary-name">TITLE</a>
    </td>
  </tr>
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    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.META-class.html" class="summary-name">META</a>
    </td>
  </tr>
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    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.LINK-class.html" class="summary-name">LINK</a>
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.SCRIPT-class.html" class="summary-name">SCRIPT</a>
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.STYLE-class.html" class="summary-name">STYLE</a>
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.IMG-class.html" class="summary-name">IMG</a>
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.SPAN-class.html" class="summary-name">SPAN</a>
    </td>
  </tr>
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    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.BODY-class.html" class="summary-name">BODY</a>
    </td>
  </tr>
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    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.H1-class.html" class="summary-name">H1</a>
    </td>
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      <span class="summary-type">&nbsp;</span>
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        <a href="web2py.gluon.html.H2-class.html" class="summary-name">H2</a>
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      <span class="summary-type">&nbsp;</span>
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    </td>
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      <span class="summary-type">&nbsp;</span>
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        <a href="web2py.gluon.html.H4-class.html" class="summary-name">H4</a>
    </td>
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    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.H5-class.html" class="summary-name">H5</a>
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.H6-class.html" class="summary-name">H6</a>
    </td>
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    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.P-class.html" class="summary-name">P</a><br />
      Will replace ``\n`` by ``&lt;br /&gt;`` if the `cr2br` attribute
        is provided.
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.B-class.html" class="summary-name">B</a>
    </td>
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    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.BR-class.html" class="summary-name">BR</a>
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.HR-class.html" class="summary-name">HR</a>
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.A-class.html" class="summary-name">A</a>
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.BUTTON-class.html" class="summary-name">BUTTON</a>
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.EM-class.html" class="summary-name">EM</a>
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.EMBED-class.html" class="summary-name">EMBED</a>
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.TT-class.html" class="summary-name">TT</a>
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.PRE-class.html" class="summary-name">PRE</a>
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.CENTER-class.html" class="summary-name">CENTER</a>
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.CODE-class.html" class="summary-name">CODE</a><br />
      displays code in HTML with syntax highlighting.
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.LABEL-class.html" class="summary-name">LABEL</a>
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.LI-class.html" class="summary-name">LI</a>
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.UL-class.html" class="summary-name">UL</a><br />
      UL Component.
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.OL-class.html" class="summary-name">OL</a>
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.TD-class.html" class="summary-name">TD</a>
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.TH-class.html" class="summary-name">TH</a>
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.TR-class.html" class="summary-name">TR</a><br />
      TR Component.
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.THEAD-class.html" class="summary-name">THEAD</a>
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.TBODY-class.html" class="summary-name">TBODY</a>
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.TFOOT-class.html" class="summary-name">TFOOT</a>
    </td>
  </tr>
<tr class="private">
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.COL-class.html" class="summary-name">COL</a>
    </td>
  </tr>
<tr class="private">
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.COLGROUP-class.html" class="summary-name">COLGROUP</a>
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.TABLE-class.html" class="summary-name">TABLE</a><br />
      TABLE Component.
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.I-class.html" class="summary-name">I</a>
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.IFRAME-class.html" class="summary-name">IFRAME</a>
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.INPUT-class.html" class="summary-name">INPUT</a><br />
      INPUT Component

examples::

    &gt;&gt;&gt; INPUT(_type='text', _name='name', value='Max').xml()
    '&lt;input name=&quot;name&quot; type=&quot;text&quot; value=&quot;Max&quot; /&gt;'

    &gt;&gt;&gt; INPUT(_type='checkbox', _name='checkbox', value='on').xml()
    '&lt;input checked=&quot;checked&quot; name=&quot;checkbox&quot; type=&quot;checkbox&quot; value=&quot;on&quot; /&gt;'

    &gt;&gt;&gt; INPUT(_type='radio', _name='radio', _value='yes', value='yes').xml()
    '&lt;input checked=&quot;checked&quot; name=&quot;radio&quot; type=&quot;radio&quot; value=&quot;yes&quot; /&gt;'

    &gt;&gt;&gt; INPUT(_type='radio', _name='radio', _value='no', value='yes').xml()
    '&lt;input name=&quot;radio&quot; type=&quot;radio&quot; value=&quot;no&quot; /&gt;'

the input helper takes two special attributes value= and requires=.
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.TEXTAREA-class.html" class="summary-name">TEXTAREA</a><br />
      example:
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.OPTION-class.html" class="summary-name">OPTION</a>
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.OBJECT-class.html" class="summary-name">OBJECT</a>
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.OPTGROUP-class.html" class="summary-name">OPTGROUP</a>
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.SELECT-class.html" class="summary-name">SELECT</a><br />
      example:
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.FIELDSET-class.html" class="summary-name">FIELDSET</a>
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.LEGEND-class.html" class="summary-name">LEGEND</a>
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.FORM-class.html" class="summary-name">FORM</a><br />
      example:
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.BEAUTIFY-class.html" class="summary-name">BEAUTIFY</a><br />
      example::

    &gt;&gt;&gt; BEAUTIFY(['a', 'b', {'hello': 'world'}]).xml()
    '&lt;div&gt;&lt;table&gt;&lt;tr&gt;&lt;td&gt;&lt;div&gt;a&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td&gt;&lt;div&gt;b&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td&gt;&lt;div&gt;&lt;table&gt;&lt;tr&gt;&lt;td style=&quot;font-weight:bold;&quot;&gt;hello&lt;/td&gt;&lt;td valign=&quot;top&quot;&gt;:&lt;/td&gt;&lt;td&gt;&lt;div&gt;world&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;'

turns any list, dictionary, etc into decent looking html.
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.MENU-class.html" class="summary-name">MENU</a><br />
      Used to build menus...
    </td>
  </tr>
<tr class="private">
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.web2pyHTMLParser-class.html" class="summary-name">web2pyHTMLParser</a><br />
      obj = web2pyHTMLParser(text) parses and html/xml text into 
        web2py helpers.
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="web2py.gluon.html.MARKMIN-class.html" class="summary-name">MARKMIN</a><br />
      For documentation: 
        http://web2py.com/examples/static/markmin.html
    </td>
  </tr>
</table>
<!-- ==================== FUNCTIONS ==================== -->
<a name="section-Functions"></a>
<table class="summary" border="1" cellpadding="3"
       cellspacing="0" width="100%" bgcolor="white">
<tr bgcolor="#70b0f0" class="table-header">
  <td colspan="2" class="table-header">
    <table border="0" cellpadding="0" cellspacing="0" width="100%">
      <tr valign="top">
        <td align="left"><span class="table-header">Functions</span></td>
        <td align="right" valign="top"
         ><span class="options">[<a href="#section-Functions"
         class="privatelink" onclick="toggle_private();"
         >hide private</a>]</span></td>
      </tr>
    </table>
  </td>
</tr>
<tr class="private">
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
      <table width="100%" cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td><span class="summary-sig"><a href="web2py.gluon.html-module.html#join" class="summary-sig-name">join</a>(<span class="summary-sig-arg">S</span>,
        <span class="summary-sig-arg">sequence</span>)</span><br />
      Return a string which is the concatenation of the strings in the 
      sequence.</td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.html-pysrc.html#join">source&nbsp;code</a></span>
            
          </td>
        </tr>
      </table>
      
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
      <table width="100%" cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td><span class="summary-sig"><a href="web2py.gluon.html-module.html#xmlescape" class="summary-sig-name">xmlescape</a>(<span class="summary-sig-arg">data</span>,
        <span class="summary-sig-arg">quote</span>=<span class="summary-sig-default">True</span>)</span><br />
      returns an escaped string of the provided data</td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.html-pysrc.html#xmlescape">source&nbsp;code</a></span>
            
          </td>
        </tr>
      </table>
      
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
      <table width="100%" cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td><span class="summary-sig"><a href="web2py.gluon.html-module.html#URL" class="summary-sig-name">URL</a>(<span class="summary-sig-arg">a</span>=<span class="summary-sig-default">1</span>,
        <span class="summary-sig-arg">c</span>=<span class="summary-sig-default">1</span>,
        <span class="summary-sig-arg">f</span>=<span class="summary-sig-default">1</span>,
        <span class="summary-sig-arg">r</span>=<span class="summary-sig-default">1</span>,
        <span class="summary-sig-arg">args</span>=<span class="summary-sig-default"><code class="variable-group">[</code><code class="variable-group">]</code></span>,
        <span class="summary-sig-arg">vars</span>=<span class="summary-sig-default"><code class="variable-group">{</code><code class="variable-group">}</code></span>,
        <span class="summary-sig-arg">anchor</span>=<span class="summary-sig-default"><code class="variable-quote">'</code><code class="variable-string"></code><code class="variable-quote">'</code></span>,
        <span class="summary-sig-arg">extension</span>=<span class="summary-sig-default">1</span>,
        <span class="summary-sig-arg">env</span>=<span class="summary-sig-default">1</span>,
        <span class="summary-sig-arg">hmac_key</span>=<span class="summary-sig-default">1</span>,
        <span class="summary-sig-arg">hash_vars</span>=<span class="summary-sig-default">True</span>,
        <span class="summary-sig-arg">salt</span>=<span class="summary-sig-default">1</span>,
        <span class="summary-sig-arg">user_signature</span>=<span class="summary-sig-default">1</span>,
        <span class="summary-sig-arg">scheme</span>=<span class="summary-sig-default">1</span>,
        <span class="summary-sig-arg">host</span>=<span class="summary-sig-default">1</span>,
        <span class="summary-sig-arg">port</span>=<span class="summary-sig-default">1</span>)</span><br />
      generate a URL

example::

    &gt;&gt;&gt; str(URL(a='a', c='c', f='f', args=['x', 'y', 'z'],
    ...</td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.html-pysrc.html#URL">source&nbsp;code</a></span>
            
          </td>
        </tr>
      </table>
      
    </td>
  </tr>
<tr class="private">
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
      <table width="100%" cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td><span class="summary-sig"><a href="web2py.gluon.html-module.html#verifyURL" class="summary-sig-name">verifyURL</a>(<span class="summary-sig-arg">request</span>,
        <span class="summary-sig-arg">hmac_key</span>=<span class="summary-sig-default">1</span>,
        <span class="summary-sig-arg">hash_vars</span>=<span class="summary-sig-default">True</span>,
        <span class="summary-sig-arg">salt</span>=<span class="summary-sig-default">1</span>,
        <span class="summary-sig-arg">user_signature</span>=<span class="summary-sig-default">1</span>)</span><br />
      Verifies that a request's args &amp; vars have not been tampered with by the user

:param request: web2py's request object
:param hmac_key: the key to authenticate with, must be the same one previously
                used when calling URL()
:param hash_vars: which vars to include in our hashing.</td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.html-pysrc.html#verifyURL">source&nbsp;code</a></span>
            
          </td>
        </tr>
      </table>
      
    </td>
  </tr>
<tr class="private">
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
      <table width="100%" cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td><span class="summary-sig"><a name="XML_unpickle"></a><span class="summary-sig-name">XML_unpickle</span>(<span class="summary-sig-arg">data</span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.html-pysrc.html#XML_unpickle">source&nbsp;code</a></span>
            
          </td>
        </tr>
      </table>
      
    </td>
  </tr>
<tr class="private">
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
      <table width="100%" cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td><span class="summary-sig"><a name="XML_pickle"></a><span class="summary-sig-name">XML_pickle</span>(<span class="summary-sig-arg">data</span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.html-pysrc.html#XML_pickle">source&nbsp;code</a></span>
            
          </td>
        </tr>
      </table>
      
    </td>
  </tr>
<tr class="private">
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
      <table width="100%" cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td><span class="summary-sig"><a name="TAG_unpickler"></a><span class="summary-sig-name">TAG_unpickler</span>(<span class="summary-sig-arg">data</span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.html-pysrc.html#TAG_unpickler">source&nbsp;code</a></span>
            
          </td>
        </tr>
      </table>
      
    </td>
  </tr>
<tr class="private">
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
      <table width="100%" cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td><span class="summary-sig"><a name="TAG_pickler"></a><span class="summary-sig-name">TAG_pickler</span>(<span class="summary-sig-arg">data</span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.html-pysrc.html#TAG_pickler">source&nbsp;code</a></span>
            
          </td>
        </tr>
      </table>
      
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
      <table width="100%" cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td><span class="summary-sig"><a href="web2py.gluon.html-module.html#embed64" class="summary-sig-name">embed64</a>(<span class="summary-sig-arg">filename</span>=<span class="summary-sig-default">1</span>,
        <span class="summary-sig-arg">file</span>=<span class="summary-sig-default">1</span>,
        <span class="summary-sig-arg">data</span>=<span class="summary-sig-default">1</span>,
        <span class="summary-sig-arg">extension</span>=<span class="summary-sig-default"><code class="variable-quote">'</code><code class="variable-string">image/gif</code><code class="variable-quote">'</code></span>)</span><br />
      helper to encode the provided (binary) data into base64.</td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.html-pysrc.html#embed64">source&nbsp;code</a></span>
            
          </td>
        </tr>
      </table>
      
    </td>
  </tr>
<tr class="private">
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
      <table width="100%" cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td><span class="summary-sig"><a href="web2py.gluon.html-module.html#test" class="summary-sig-name">test</a>()</span><br />
      Example:</td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.html-pysrc.html#test">source&nbsp;code</a></span>
            
          </td>
        </tr>
      </table>
      
    </td>
  </tr>
<tr class="private">
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
      <table width="100%" cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td><span class="summary-sig"><a name="markdown_serializer"></a><span class="summary-sig-name">markdown_serializer</span>(<span class="summary-sig-arg">text</span>,
        <span class="summary-sig-arg">tag</span>=<span class="summary-sig-default">1</span>,
        <span class="summary-sig-arg">attr</span>=<span class="summary-sig-default"><code class="variable-group">{</code><code class="variable-group">}</code></span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.html-pysrc.html#markdown_serializer">source&nbsp;code</a></span>
            
          </td>
        </tr>
      </table>
      
    </td>
  </tr>
<tr class="private">
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
      <table width="100%" cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td><span class="summary-sig"><a name="markmin_serializer"></a><span class="summary-sig-name">markmin_serializer</span>(<span class="summary-sig-arg">text</span>,
        <span class="summary-sig-arg">tag</span>=<span class="summary-sig-default">1</span>,
        <span class="summary-sig-arg">attr</span>=<span class="summary-sig-default"><code class="variable-group">{</code><code class="variable-group">}</code></span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.html-pysrc.html#markmin_serializer">source&nbsp;code</a></span>
            
          </td>
        </tr>
      </table>
      
    </td>
  </tr>
</table>
<!-- ==================== VARIABLES ==================== -->
<a name="section-Variables"></a>
<table class="summary" border="1" cellpadding="3"
       cellspacing="0" width="100%" bgcolor="white">
<tr bgcolor="#70b0f0" class="table-header">
  <td colspan="2" class="table-header">
    <table border="0" cellpadding="0" cellspacing="0" width="100%">
      <tr valign="top">
        <td align="left"><span class="table-header">Variables</span></td>
        <td align="right" valign="top"
         ><span class="options">[<a href="#section-Variables"
         class="privatelink" onclick="toggle_private();"
         >hide private</a>]</span></td>
      </tr>
    </table>
  </td>
</tr>
<tr class="private">
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a name="regex_crlf"></a><span class="summary-name">regex_crlf</span> = <code title="re.compile(r'[\r\n]')">re.compile(r'<code class="re-group">[</code>\r\n<code class="re-group">]</code>')</code>
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a name="ON"></a><span class="summary-name">ON</span> = <code title="True">True</code>
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a name="TAG"></a><span class="summary-name">TAG</span> = <code title="__TAG__()">__TAG__()</code>
    </td>
  </tr>
</table>
<!-- ==================== FUNCTION DETAILS ==================== -->
<a name="section-FunctionDetails"></a>
<table class="details" border="1" cellpadding="3"
       cellspacing="0" width="100%" bgcolor="white">
<tr bgcolor="#70b0f0" class="table-header">
  <td colspan="2" class="table-header">
    <table border="0" cellpadding="0" cellspacing="0" width="100%">
      <tr valign="top">
        <td align="left"><span class="table-header">Function Details</span></td>
        <td align="right" valign="top"
         ><span class="options">[<a href="#section-FunctionDetails"
         class="privatelink" onclick="toggle_private();"
         >hide private</a>]</span></td>
      </tr>
    </table>
  </td>
</tr>
</table>
<a name="join"></a>
<div class="private">
<table class="details" border="1" cellpadding="3"
       cellspacing="0" width="100%" bgcolor="white">
<tr><td>
  <table width="100%" cellpadding="0" cellspacing="0" border="0">
  <tr valign="top"><td>
  <h3 class="epydoc"><span class="sig"><span class="sig-name">join</span>(<span class="sig-arg">S</span>,
        <span class="sig-arg">sequence</span>)</span>
  </h3>
  </td><td align="right" valign="top"
    ><span class="codelink"><a href="web2py.gluon.html-pysrc.html#join">source&nbsp;code</a></span>&nbsp;
    </td>
  </table>
  
  Return a string which is the concatenation of the strings in the 
  sequence.  The separator between elements is S.
  <dl class="fields">
    <dt>Returns:</dt>
        <dd><pre class="literalblock">
string

</pre></dd>
  </dl>
</td></tr></table>
</div>
<a name="xmlescape"></a>
<div>
<table class="details" border="1" cellpadding="3"
       cellspacing="0" width="100%" bgcolor="white">
<tr><td>
  <table width="100%" cellpadding="0" cellspacing="0" border="0">
  <tr valign="top"><td>
  <h3 class="epydoc"><span class="sig"><span class="sig-name">xmlescape</span>(<span class="sig-arg">data</span>,
        <span class="sig-arg">quote</span>=<span class="sig-default">True</span>)</span>
  </h3>
  </td><td align="right" valign="top"
    ><span class="codelink"><a href="web2py.gluon.html-pysrc.html#xmlescape">source&nbsp;code</a></span>&nbsp;
    </td>
  </table>
  
  <p>returns an escaped string of the provided data</p>
  :param data: the data to be escaped :param quote: optional (default 
  False)
  <dl class="fields">
  </dl>
</td></tr></table>
</div>
<a name="URL"></a>
<div>
<table class="details" border="1" cellpadding="3"
       cellspacing="0" width="100%" bgcolor="white">
<tr><td>
  <table width="100%" cellpadding="0" cellspacing="0" border="0">
  <tr valign="top"><td>
  <h3 class="epydoc"><span class="sig"><span class="sig-name">URL</span>(<span class="sig-arg">a</span>=<span class="sig-default">1</span>,
        <span class="sig-arg">c</span>=<span class="sig-default">1</span>,
        <span class="sig-arg">f</span>=<span class="sig-default">1</span>,
        <span class="sig-arg">r</span>=<span class="sig-default">1</span>,
        <span class="sig-arg">args</span>=<span class="sig-default"><code class="variable-group">[</code><code class="variable-group">]</code></span>,
        <span class="sig-arg">vars</span>=<span class="sig-default"><code class="variable-group">{</code><code class="variable-group">}</code></span>,
        <span class="sig-arg">anchor</span>=<span class="sig-default"><code class="variable-quote">'</code><code class="variable-string"></code><code class="variable-quote">'</code></span>,
        <span class="sig-arg">extension</span>=<span class="sig-default">1</span>,
        <span class="sig-arg">env</span>=<span class="sig-default">1</span>,
        <span class="sig-arg">hmac_key</span>=<span class="sig-default">1</span>,
        <span class="sig-arg">hash_vars</span>=<span class="sig-default">True</span>,
        <span class="sig-arg">salt</span>=<span class="sig-default">1</span>,
        <span class="sig-arg">user_signature</span>=<span class="sig-default">1</span>,
        <span class="sig-arg">scheme</span>=<span class="sig-default">1</span>,
        <span class="sig-arg">host</span>=<span class="sig-default">1</span>,
        <span class="sig-arg">port</span>=<span class="sig-default">1</span>)</span>
  </h3>
  </td><td align="right" valign="top"
    ><span class="codelink"><a href="web2py.gluon.html-pysrc.html#URL">source&nbsp;code</a></span>&nbsp;
    </td>
  </table>
  
  <pre class="literalblock">

generate a URL

example::

    &gt;&gt;&gt; str(URL(a='a', c='c', f='f', args=['x', 'y', 'z'],
    ...     vars={'p':1, 'q':2}, anchor='1'))
    '/a/c/f/x/y/z?p=1&amp;q=2#1'

    &gt;&gt;&gt; str(URL(a='a', c='c', f='f', args=['x', 'y', 'z'],
    ...     vars={'p':(1,3), 'q':2}, anchor='1'))
    '/a/c/f/x/y/z?p=1&amp;p=3&amp;q=2#1'

    &gt;&gt;&gt; str(URL(a='a', c='c', f='f', args=['x', 'y', 'z'],
    ...     vars={'p':(3,1), 'q':2}, anchor='1'))
    '/a/c/f/x/y/z?p=3&amp;p=1&amp;q=2#1'

    &gt;&gt;&gt; str(URL(a='a', c='c', f='f', anchor='1+2'))
    '/a/c/f#1%2B2'

    &gt;&gt;&gt; str(URL(a='a', c='c', f='f', args=['x', 'y', 'z'],
    ...     vars={'p':(1,3), 'q':2}, anchor='1', hmac_key='key'))
    '/a/c/f/x/y/z?p=1&amp;p=3&amp;q=2&amp;_signature=5d06bb8a4a6093dd325da2ee591c35c61afbd3c6#1'

generates a url '/a/c/f' corresponding to application a, controller c
and function f. If r=request is passed, a, c, f are set, respectively,
to r.application, r.controller, r.function.

The more typical usage is:

URL(r=request, f='index') that generates a url for the index function
within the present application and controller.

:param a: application (default to current if r is given)
:param c: controller (default to current if r is given)
:param f: function (default to current if r is given)
:param r: request (optional)
:param args: any arguments (optional)
:param vars: any variables (optional)
:param anchor: anchorname, without # (optional)
:param hmac_key: key to use when generating hmac signature (optional)
:param hash_vars: which of the vars to include in our hmac signature
    True (default) - hash all vars, False - hash none of the vars,
    iterable - hash only the included vars ['key1','key2']
:param scheme: URI scheme (True, 'http' or 'https', etc); forces absolute URL (optional)
:param host: string to force absolute URL with host (True means http_host)
:param port: optional port number (forces absolute URL)

:raises SyntaxError: when no application, controller or function is
    available
:raises SyntaxError: when a CRLF is found in the generated url

</pre>
  <dl class="fields">
  </dl>
</td></tr></table>
</div>
<a name="verifyURL"></a>
<div class="private">
<table class="details" border="1" cellpadding="3"
       cellspacing="0" width="100%" bgcolor="white">
<tr><td>
  <table width="100%" cellpadding="0" cellspacing="0" border="0">
  <tr valign="top"><td>
  <h3 class="epydoc"><span class="sig"><span class="sig-name">verifyURL</span>(<span class="sig-arg">request</span>,
        <span class="sig-arg">hmac_key</span>=<span class="sig-default">1</span>,
        <span class="sig-arg">hash_vars</span>=<span class="sig-default">True</span>,
        <span class="sig-arg">salt</span>=<span class="sig-default">1</span>,
        <span class="sig-arg">user_signature</span>=<span class="sig-default">1</span>)</span>
  </h3>
  </td><td align="right" valign="top"
    ><span class="codelink"><a href="web2py.gluon.html-pysrc.html#verifyURL">source&nbsp;code</a></span>&nbsp;
    </td>
  </table>
  
  <pre class="literalblock">

Verifies that a request's args &amp; vars have not been tampered with by the user

:param request: web2py's request object
:param hmac_key: the key to authenticate with, must be the same one previously
                used when calling URL()
:param hash_vars: which vars to include in our hashing. (Optional)
                Only uses the 1st value currently
                True (or undefined) means all, False none,
                an iterable just the specified keys

do not call directly. Use instead:

URL.verify(hmac_key='...')

the key has to match the one used to generate the URL.

    &gt;&gt;&gt; r = Storage()
    &gt;&gt;&gt; gv = Storage(p=(1,3),q=2,_signature='5d06bb8a4a6093dd325da2ee591c35c61afbd3c6')
    &gt;&gt;&gt; r.update(dict(application='a', controller='c', function='f'))
    &gt;&gt;&gt; r['args'] = ['x', 'y', 'z']
    &gt;&gt;&gt; r['get_vars'] = gv
    &gt;&gt;&gt; verifyURL(r, 'key')
    True
    &gt;&gt;&gt; verifyURL(r, 'kay')
    False
    &gt;&gt;&gt; r.get_vars.p = (3, 1)
    &gt;&gt;&gt; verifyURL(r, 'key')
    True
    &gt;&gt;&gt; r.get_vars.p = (3, 2)
    &gt;&gt;&gt; verifyURL(r, 'key')
    False

</pre>
  <dl class="fields">
  </dl>
</td></tr></table>
</div>
<a name="embed64"></a>
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<tr><td>
  <table width="100%" cellpadding="0" cellspacing="0" border="0">
  <tr valign="top"><td>
  <h3 class="epydoc"><span class="sig"><span class="sig-name">embed64</span>(<span class="sig-arg">filename</span>=<span class="sig-default">1</span>,
        <span class="sig-arg">file</span>=<span class="sig-default">1</span>,
        <span class="sig-arg">data</span>=<span class="sig-default">1</span>,
        <span class="sig-arg">extension</span>=<span class="sig-default"><code class="variable-quote">'</code><code class="variable-string">image/gif</code><code class="variable-quote">'</code></span>)</span>
  </h3>
  </td><td align="right" valign="top"
    ><span class="codelink"><a href="web2py.gluon.html-pysrc.html#embed64">source&nbsp;code</a></span>&nbsp;
    </td>
  </table>
  
  <p>helper to encode the provided (binary) data into base64.</p>
  :param filename: if provided, opens and reads this file in 'rb' mode 
  :param file: if provided, reads this file :param data: if provided, uses 
  the provided data
  <dl class="fields">
  </dl>
</td></tr></table>
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<a name="test"></a>
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       cellspacing="0" width="100%" bgcolor="white">
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  <table width="100%" cellpadding="0" cellspacing="0" border="0">
  <tr valign="top"><td>
  <h3 class="epydoc"><span class="sig"><span class="sig-name">test</span>()</span>
  </h3>
  </td><td align="right" valign="top"
    ><span class="codelink"><a href="web2py.gluon.html-pysrc.html#test">source&nbsp;code</a></span>&nbsp;
    </td>
  </table>
  
  Example:
<pre class="py-doctest">
<span class="py-prompt">&gt;&gt;&gt; </span><span class="py-keyword">from</span> validators <span class="py-keyword">import</span> *
<span class="py-prompt">&gt;&gt;&gt; </span><span class="py-keyword">print</span> DIV(A(<span class="py-string">'click me'</span>, _href=URL(a=<span class="py-string">'a'</span>, c=<span class="py-string">'b'</span>, f=<span class="py-string">'c'</span>)), BR(), HR(), DIV(SPAN(<span class="py-string">&quot;World&quot;</span>), _class=<span class="py-string">'unknown'</span>)).xml()
<span class="py-output">&lt;div&gt;&lt;a href=&quot;/a/b/c&quot;&gt;click me&lt;/a&gt;&lt;br /&gt;&lt;hr /&gt;&lt;div class=&quot;unknown&quot;&gt;&lt;span&gt;World&lt;/span&gt;&lt;/div&gt;&lt;/div&gt;</span>
<span class="py-output"></span><span class="py-prompt">&gt;&gt;&gt; </span><span class="py-keyword">print</span> DIV(UL(<span class="py-string">&quot;doc&quot;</span>,<span class="py-string">&quot;cat&quot;</span>,<span class="py-string">&quot;mouse&quot;</span>)).xml()
<span class="py-output">&lt;div&gt;&lt;ul&gt;&lt;li&gt;doc&lt;/li&gt;&lt;li&gt;cat&lt;/li&gt;&lt;li&gt;mouse&lt;/li&gt;&lt;/ul&gt;&lt;/div&gt;</span>
<span class="py-output"></span><span class="py-prompt">&gt;&gt;&gt; </span><span class="py-keyword">print</span> DIV(UL(<span class="py-string">&quot;doc&quot;</span>, LI(<span class="py-string">&quot;cat&quot;</span>, _class=<span class="py-string">'feline'</span>), 18)).xml()
<span class="py-output">&lt;div&gt;&lt;ul&gt;&lt;li&gt;doc&lt;/li&gt;&lt;li class=&quot;feline&quot;&gt;cat&lt;/li&gt;&lt;li&gt;18&lt;/li&gt;&lt;/ul&gt;&lt;/div&gt;</span>
<span class="py-output"></span><span class="py-prompt">&gt;&gt;&gt; </span><span class="py-keyword">print</span> TABLE([<span class="py-string">'a'</span>, <span class="py-string">'b'</span>, <span class="py-string">'c'</span>], TR(<span class="py-string">'d'</span>, <span class="py-string">'e'</span>, <span class="py-string">'f'</span>), TR(TD(1), TD(2), TD(3))).xml()
<span class="py-output">&lt;table&gt;&lt;tr&gt;&lt;td&gt;a&lt;/td&gt;&lt;td&gt;b&lt;/td&gt;&lt;td&gt;c&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td&gt;d&lt;/td&gt;&lt;td&gt;e&lt;/td&gt;&lt;td&gt;f&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td&gt;1&lt;/td&gt;&lt;td&gt;2&lt;/td&gt;&lt;td&gt;3&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</span>
<span class="py-output"></span><span class="py-prompt">&gt;&gt;&gt; </span>form=FORM(INPUT(_type=<span class="py-string">'text'</span>, _name=<span class="py-string">'myvar'</span>, requires=IS_EXPR(<span class="py-string">'int(value)&lt;10'</span>)))
<span class="py-prompt">&gt;&gt;&gt; </span><span class="py-keyword">print</span> form.xml()
<span class="py-output">&lt;form action=&quot;&quot; enctype=&quot;multipart/form-data&quot; method=&quot;post&quot;&gt;&lt;input name=&quot;myvar&quot; type=&quot;text&quot; /&gt;&lt;/form&gt;</span>
<span class="py-output"></span><span class="py-prompt">&gt;&gt;&gt; </span><span class="py-keyword">print</span> form.accepts({<span class="py-string">'myvar'</span>:<span class="py-string">'34'</span>}, formname=None)
<span class="py-output">False</span>
<span class="py-output"></span><span class="py-prompt">&gt;&gt;&gt; </span><span class="py-keyword">print</span> form.xml()
<span class="py-output">&lt;form action=&quot;&quot; enctype=&quot;multipart/form-data&quot; method=&quot;post&quot;&gt;&lt;input name=&quot;myvar&quot; type=&quot;text&quot; value=&quot;34&quot; /&gt;&lt;div class=&quot;error&quot; id=&quot;myvar__error&quot;&gt;invalid expression&lt;/div&gt;&lt;/form&gt;</span>
<span class="py-output"></span><span class="py-prompt">&gt;&gt;&gt; </span><span class="py-keyword">print</span> form.accepts({<span class="py-string">'myvar'</span>:<span class="py-string">'4'</span>}, formname=None, keepvalues=True)
<span class="py-output">True</span>
<span class="py-output"></span><span class="py-prompt">&gt;&gt;&gt; </span><span class="py-keyword">print</span> form.xml()
<span class="py-output">&lt;form action=&quot;&quot; enctype=&quot;multipart/form-data&quot; method=&quot;post&quot;&gt;&lt;input name=&quot;myvar&quot; type=&quot;text&quot; value=&quot;4&quot; /&gt;&lt;/form&gt;</span>
<span class="py-output"></span><span class="py-prompt">&gt;&gt;&gt; </span>form=FORM(SELECT(<span class="py-string">'cat'</span>, <span class="py-string">'dog'</span>, _name=<span class="py-string">'myvar'</span>))
<span class="py-prompt">&gt;&gt;&gt; </span><span class="py-keyword">print</span> form.accepts({<span class="py-string">'myvar'</span>:<span class="py-string">'dog'</span>}, formname=None, keepvalues=True)
<span class="py-output">True</span>
<span class="py-output"></span><span class="py-prompt">&gt;&gt;&gt; </span><span class="py-keyword">print</span> form.xml()
<span class="py-output">&lt;form action=&quot;&quot; enctype=&quot;multipart/form-data&quot; method=&quot;post&quot;&gt;&lt;select name=&quot;myvar&quot;&gt;&lt;option value=&quot;cat&quot;&gt;cat&lt;/option&gt;&lt;option selected=&quot;selected&quot; value=&quot;dog&quot;&gt;dog&lt;/option&gt;&lt;/select&gt;&lt;/form&gt;</span>
<span class="py-output"></span><span class="py-prompt">&gt;&gt;&gt; </span>form=FORM(INPUT(_type=<span class="py-string">'text'</span>, _name=<span class="py-string">'myvar'</span>, requires=IS_MATCH(<span class="py-string">'^\w+$'</span>, <span class="py-string">'only alphanumeric!'</span>)))
<span class="py-prompt">&gt;&gt;&gt; </span><span class="py-keyword">print</span> form.accepts({<span class="py-string">'myvar'</span>:<span class="py-string">'as df'</span>}, formname=None)
<span class="py-output">False</span>
<span class="py-output"></span><span class="py-prompt">&gt;&gt;&gt; </span><span class="py-keyword">print</span> form.xml()
<span class="py-output">&lt;form action=&quot;&quot; enctype=&quot;multipart/form-data&quot; method=&quot;post&quot;&gt;&lt;input name=&quot;myvar&quot; type=&quot;text&quot; value=&quot;as df&quot; /&gt;&lt;div class=&quot;error&quot; id=&quot;myvar__error&quot;&gt;only alphanumeric!&lt;/div&gt;&lt;/form&gt;</span>
<span class="py-output"></span><span class="py-prompt">&gt;&gt;&gt; </span>session={}
<span class="py-prompt">&gt;&gt;&gt; </span>form=FORM(INPUT(value=<span class="py-string">&quot;Hello World&quot;</span>, _name=<span class="py-string">&quot;var&quot;</span>, requires=IS_MATCH(<span class="py-string">'^\w+$'</span>)))
<span class="py-prompt">&gt;&gt;&gt; </span><span class="py-keyword">if</span> form.accepts({}, session,formname=None): <span class="py-keyword">print</span> <span class="py-string">'passed'</span>
<span class="py-prompt">&gt;&gt;&gt; </span><span class="py-keyword">if</span> form.accepts({<span class="py-string">'var'</span>:<span class="py-string">'test '</span>, <span class="py-string">'_formkey'</span>: session[<span class="py-string">'_formkey[None]'</span>]}, session, formname=None): <span class="py-keyword">print</span> <span class="py-string">'passed'</span></pre>
  <dl class="fields">
  </dl>
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