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        <a href="web2py.gluon.dal-module.html">Module&nbsp;dal</a> ::
        Class&nbsp;Expression
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<!-- ==================== CLASS DESCRIPTION ==================== -->
<h1 class="epydoc">Class Expression</h1><span class="codelink"><a href="web2py.gluon.dal-pysrc.html#Expression">source&nbsp;code</a></span><br /><br />
<pre class="base-tree">
object --+
         |
        <strong class="uidshort">Expression</strong>
</pre>

<dl><dt>Known Subclasses:</dt>
<dd>
    <a href="web2py.gluon.dal.Field-class.html">Field</a>
</dd></dl>

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<!-- ==================== INSTANCE METHODS ==================== -->
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      <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.dal.Expression-class.html#__init__" class="summary-sig-name">__init__</a>(<span class="summary-sig-arg">self</span>,
        <span class="summary-sig-arg">db</span>,
        <span class="summary-sig-arg">op</span>,
        <span class="summary-sig-arg">first</span>=<span class="summary-sig-default">1</span>,
        <span class="summary-sig-arg">second</span>=<span class="summary-sig-default">1</span>,
        <span class="summary-sig-arg">type</span>=<span class="summary-sig-default">1</span>)</span><br />
      x.__init__(...) initializes x; see x.__class__.__doc__ for 
      signature</td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.dal-pysrc.html#Expression.__init__">source&nbsp;code</a></span>
            
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      <span class="summary-type">&nbsp;</span>
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      <table width="100%" cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td><span class="summary-sig"><a name="sum"></a><span class="summary-sig-name">sum</span>(<span class="summary-sig-arg">self</span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.dal-pysrc.html#Expression.sum">source&nbsp;code</a></span>
            
          </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">
      <table width="100%" cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td><span class="summary-sig"><a name="max"></a><span class="summary-sig-name">max</span>(<span class="summary-sig-arg">self</span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.dal-pysrc.html#Expression.max">source&nbsp;code</a></span>
            
          </td>
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      <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="min"></a><span class="summary-sig-name">min</span>(<span class="summary-sig-arg">self</span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.dal-pysrc.html#Expression.min">source&nbsp;code</a></span>
            
          </td>
        </tr>
      </table>
      
    </td>
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<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 name="len"></a><span class="summary-sig-name">len</span>(<span class="summary-sig-arg">self</span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.dal-pysrc.html#Expression.len">source&nbsp;code</a></span>
            
          </td>
        </tr>
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    </td>
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<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 name="lower"></a><span class="summary-sig-name">lower</span>(<span class="summary-sig-arg">self</span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.dal-pysrc.html#Expression.lower">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 name="upper"></a><span class="summary-sig-name">upper</span>(<span class="summary-sig-arg">self</span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.dal-pysrc.html#Expression.upper">source&nbsp;code</a></span>
            
          </td>
        </tr>
      </table>
      
    </td>
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    <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="year"></a><span class="summary-sig-name">year</span>(<span class="summary-sig-arg">self</span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.dal-pysrc.html#Expression.year">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 name="month"></a><span class="summary-sig-name">month</span>(<span class="summary-sig-arg">self</span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.dal-pysrc.html#Expression.month">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 name="day"></a><span class="summary-sig-name">day</span>(<span class="summary-sig-arg">self</span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.dal-pysrc.html#Expression.day">source&nbsp;code</a></span>
            
          </td>
        </tr>
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    </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 name="hour"></a><span class="summary-sig-name">hour</span>(<span class="summary-sig-arg">self</span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.dal-pysrc.html#Expression.hour">source&nbsp;code</a></span>
            
          </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">
      <table width="100%" cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td><span class="summary-sig"><a name="minutes"></a><span class="summary-sig-name">minutes</span>(<span class="summary-sig-arg">self</span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.dal-pysrc.html#Expression.minutes">source&nbsp;code</a></span>
            
          </td>
        </tr>
      </table>
      
    </td>
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<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 name="coalesce_zero"></a><span class="summary-sig-name">coalesce_zero</span>(<span class="summary-sig-arg">self</span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.dal-pysrc.html#Expression.coalesce_zero">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 name="seconds"></a><span class="summary-sig-name">seconds</span>(<span class="summary-sig-arg">self</span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.dal-pysrc.html#Expression.seconds">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 name="__getslice__"></a><span class="summary-sig-name">__getslice__</span>(<span class="summary-sig-arg">self</span>,
        <span class="summary-sig-arg">start</span>,
        <span class="summary-sig-arg">stop</span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.dal-pysrc.html#Expression.__getslice__">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 name="__getitem__"></a><span class="summary-sig-name">__getitem__</span>(<span class="summary-sig-arg">self</span>,
        <span class="summary-sig-arg">i</span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.dal-pysrc.html#Expression.__getitem__">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.dal.Expression-class.html#__str__" class="summary-sig-name">__str__</a>(<span class="summary-sig-arg">self</span>)</span><br />
      str(x)</td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.dal-pysrc.html#Expression.__str__">source&nbsp;code</a></span>
            
          </td>
        </tr>
      </table>
      
    </td>
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<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 name="__or__"></a><span class="summary-sig-name">__or__</span>(<span class="summary-sig-arg">self</span>,
        <span class="summary-sig-arg">other</span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.dal-pysrc.html#Expression.__or__">source&nbsp;code</a></span>
            
          </td>
        </tr>
      </table>
      
    </td>
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<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 name="__invert__"></a><span class="summary-sig-name">__invert__</span>(<span class="summary-sig-arg">self</span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.dal-pysrc.html#Expression.__invert__">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 name="__add__"></a><span class="summary-sig-name">__add__</span>(<span class="summary-sig-arg">self</span>,
        <span class="summary-sig-arg">other</span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.dal-pysrc.html#Expression.__add__">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 name="__sub__"></a><span class="summary-sig-name">__sub__</span>(<span class="summary-sig-arg">self</span>,
        <span class="summary-sig-arg">other</span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.dal-pysrc.html#Expression.__sub__">source&nbsp;code</a></span>
            
          </td>
        </tr>
      </table>
      
    </td>
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<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 name="__mul__"></a><span class="summary-sig-name">__mul__</span>(<span class="summary-sig-arg">self</span>,
        <span class="summary-sig-arg">other</span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.dal-pysrc.html#Expression.__mul__">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 name="__div__"></a><span class="summary-sig-name">__div__</span>(<span class="summary-sig-arg">self</span>,
        <span class="summary-sig-arg">other</span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.dal-pysrc.html#Expression.__div__">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 name="__mod__"></a><span class="summary-sig-name">__mod__</span>(<span class="summary-sig-arg">self</span>,
        <span class="summary-sig-arg">other</span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.dal-pysrc.html#Expression.__mod__">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 name="__eq__"></a><span class="summary-sig-name">__eq__</span>(<span class="summary-sig-arg">self</span>,
        <span class="summary-sig-arg">value</span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.dal-pysrc.html#Expression.__eq__">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 name="__ne__"></a><span class="summary-sig-name">__ne__</span>(<span class="summary-sig-arg">self</span>,
        <span class="summary-sig-arg">value</span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.dal-pysrc.html#Expression.__ne__">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 name="__lt__"></a><span class="summary-sig-name">__lt__</span>(<span class="summary-sig-arg">self</span>,
        <span class="summary-sig-arg">value</span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.dal-pysrc.html#Expression.__lt__">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 name="__le__"></a><span class="summary-sig-name">__le__</span>(<span class="summary-sig-arg">self</span>,
        <span class="summary-sig-arg">value</span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.dal-pysrc.html#Expression.__le__">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 name="__gt__"></a><span class="summary-sig-name">__gt__</span>(<span class="summary-sig-arg">self</span>,
        <span class="summary-sig-arg">value</span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.dal-pysrc.html#Expression.__gt__">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 name="__ge__"></a><span class="summary-sig-name">__ge__</span>(<span class="summary-sig-arg">self</span>,
        <span class="summary-sig-arg">value</span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.dal-pysrc.html#Expression.__ge__">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 name="like"></a><span class="summary-sig-name">like</span>(<span class="summary-sig-arg">self</span>,
        <span class="summary-sig-arg">value</span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.dal-pysrc.html#Expression.like">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 name="belongs"></a><span class="summary-sig-name">belongs</span>(<span class="summary-sig-arg">self</span>,
        <span class="summary-sig-arg">value</span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.dal-pysrc.html#Expression.belongs">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 name="startswith"></a><span class="summary-sig-name">startswith</span>(<span class="summary-sig-arg">self</span>,
        <span class="summary-sig-arg">value</span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.dal-pysrc.html#Expression.startswith">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 name="endswith"></a><span class="summary-sig-name">endswith</span>(<span class="summary-sig-arg">self</span>,
        <span class="summary-sig-arg">value</span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.dal-pysrc.html#Expression.endswith">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 name="contains"></a><span class="summary-sig-name">contains</span>(<span class="summary-sig-arg">self</span>,
        <span class="summary-sig-arg">value</span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.dal-pysrc.html#Expression.contains">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 name="with_alias"></a><span class="summary-sig-name">with_alias</span>(<span class="summary-sig-arg">self</span>,
        <span class="summary-sig-arg">alias</span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="web2py.gluon.dal-pysrc.html#Expression.with_alias">source&nbsp;code</a></span>
            
          </td>
        </tr>
      </table>
      
    </td>
  </tr>
  <tr>
    <td colspan="2" class="summary">
    <p class="indent-wrapped-lines"><b>Inherited from <code>object</code></b>:
      <code>__delattr__</code>,
      <code>__getattribute__</code>,
      <code>__hash__</code>,
      <code>__new__</code>,
      <code>__reduce__</code>,
      <code>__reduce_ex__</code>,
      <code>__repr__</code>,
      <code>__setattr__</code>
      </p>
    </td>
  </tr>
</table>
<!-- ==================== PROPERTIES ==================== -->
<a name="section-Properties"></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%">
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        <td align="left"><span class="table-header">Properties</span></td>
        <td align="right" valign="top"
         ><span class="options">[<a href="#section-Properties"
         class="privatelink" onclick="toggle_private();"
         >hide private</a>]</span></td>
      </tr>
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  </td>
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  <tr>
    <td colspan="2" class="summary">
    <p class="indent-wrapped-lines"><b>Inherited from <code>object</code></b>:
      <code>__class__</code>
      </p>
    </td>
  </tr>
</table>
<!-- ==================== METHOD DETAILS ==================== -->
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         class="privatelink" onclick="toggle_private();"
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<a name="__init__"></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">__init__</span>(<span class="sig-arg">self</span>,
        <span class="sig-arg">db</span>,
        <span class="sig-arg">op</span>,
        <span class="sig-arg">first</span>=<span class="sig-default">1</span>,
        <span class="sig-arg">second</span>=<span class="sig-default">1</span>,
        <span class="sig-arg">type</span>=<span class="sig-default">1</span>)</span>
    <br /><em class="fname">(Constructor)</em>
  </h3>
  </td><td align="right" valign="top"
    ><span class="codelink"><a href="web2py.gluon.dal-pysrc.html#Expression.__init__">source&nbsp;code</a></span>&nbsp;
    </td>
  </table>
  
  x.__init__(...) initializes x; see x.__class__.__doc__ for 
  signature
  <dl class="fields">
    <dt>Overrides:
      object.__init__
        <dd><em class="note">(inherited documentation)</em></dd>
    </dt>
  </dl>
</td></tr></table>
</div>
<a name="__str__"></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">__str__</span>(<span class="sig-arg">self</span>)</span>
    <br /><em class="fname">(Informal representation operator)</em>
  </h3>
  </td><td align="right" valign="top"
    ><span class="codelink"><a href="web2py.gluon.dal-pysrc.html#Expression.__str__">source&nbsp;code</a></span>&nbsp;
    </td>
  </table>
  
  str(x)
  <dl class="fields">
    <dt>Overrides:
      object.__str__
        <dd><em class="note">(inherited documentation)</em></dd>
    </dt>
  </dl>
</td></tr></table>
</div>
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