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<h1>eric5.Debugger.VariablesViewer</h1>
<p>
Module implementing the variables viewer widget.
</p>
<h3>Global Attributes</h3>
<table>
<tr><td>None</td></tr>
</table>
<h3>Classes</h3>
<table>
<tr>
<td><a href="#ArrayElementVarItem">ArrayElementVarItem</a></td>
<td>Class implementing a VariableItem that represents an array element.</td>
</tr><tr>
<td><a href="#SpecialArrayElementVarItem">SpecialArrayElementVarItem</a></td>
<td>Class implementing a QTreeWidgetItem that represents a special array variable node.</td>
</tr><tr>
<td><a href="#SpecialVarItem">SpecialVarItem</a></td>
<td>Class implementing a VariableItem that represents a special variable node.</td>
</tr><tr>
<td><a href="#VariableItem">VariableItem</a></td>
<td>Class implementing the data structure for variable items.</td>
</tr><tr>
<td><a href="#VariablesViewer">VariablesViewer</a></td>
<td>Class implementing the variables viewer widget.</td>
</tr>
</table>
<h3>Functions</h3>
<table>
<tr><td>None</td></tr>
</table>
<hr /><hr />
<a NAME="ArrayElementVarItem" ID="ArrayElementVarItem"></a>
<h2>ArrayElementVarItem</h2>
<p>
    Class implementing a VariableItem that represents an array element.
</p>
<h3>Derived from</h3>
VariableItem
<h3>Class Attributes</h3>
<table>
<tr><td>None</td></tr>
</table>
<h3>Class Methods</h3>
<table>
<tr><td>None</td></tr>
</table>
<h3>Methods</h3>
<table>
<tr>
<td><a href="#ArrayElementVarItem.__init__">ArrayElementVarItem</a></td>
<td>Constructor</td>
</tr><tr>
<td><a href="#ArrayElementVarItem.key">key</a></td>
<td>Public method generating the key for this item.</td>
</tr>
</table>
<h3>Static Methods</h3>
<table>
<tr><td>None</td></tr>
</table>
<a NAME="ArrayElementVarItem.__init__" ID="ArrayElementVarItem.__init__"></a>
<h4>ArrayElementVarItem (Constructor)</h4>
<b>ArrayElementVarItem</b>(<i>parent, dvar, dvalue, dtype</i>)
<p>
        Constructor
</p><dl>
<dt><i>parent</i></dt>
<dd>
parent of this item
</dd><dt><i>dvar</i></dt>
<dd>
variable name (string)
</dd><dt><i>dvalue</i></dt>
<dd>
value string (string)
</dd><dt><i>dtype</i></dt>
<dd>
type string (string)
</dd>
</dl><a NAME="ArrayElementVarItem.key" ID="ArrayElementVarItem.key"></a>
<h4>ArrayElementVarItem.key</h4>
<b>key</b>(<i>column</i>)
<p>
        Public method generating the key for this item.
</p><dl>
<dt><i>column</i></dt>
<dd>
the column to sort on (integer)
</dd>
</dl><dl>
<dt>Returns:</dt>
<dd>
key of the item (string)
</dd>
</dl>
<div align="right"><a href="#top">Up</a></div>
<hr /><hr />
<a NAME="SpecialArrayElementVarItem" ID="SpecialArrayElementVarItem"></a>
<h2>SpecialArrayElementVarItem</h2>
<p>
    Class implementing a QTreeWidgetItem that represents a special array
    variable node.
</p>
<h3>Derived from</h3>
SpecialVarItem
<h3>Class Attributes</h3>
<table>
<tr><td>None</td></tr>
</table>
<h3>Class Methods</h3>
<table>
<tr><td>None</td></tr>
</table>
<h3>Methods</h3>
<table>
<tr>
<td><a href="#SpecialArrayElementVarItem.__init__">SpecialArrayElementVarItem</a></td>
<td>Constructor</td>
</tr><tr>
<td><a href="#SpecialArrayElementVarItem.key">key</a></td>
<td>Public method generating the key for this item.</td>
</tr>
</table>
<h3>Static Methods</h3>
<table>
<tr><td>None</td></tr>
</table>
<a NAME="SpecialArrayElementVarItem.__init__" ID="SpecialArrayElementVarItem.__init__"></a>
<h4>SpecialArrayElementVarItem (Constructor)</h4>
<b>SpecialArrayElementVarItem</b>(<i>parent, dvar, dvalue, dtype, frmnr, scope</i>)
<p>
        Constructor
</p><dl>
<dt><i>parent</i></dt>
<dd>
parent of this item
</dd><dt><i>dvar</i></dt>
<dd>
variable name (string)
</dd><dt><i>dvalue</i></dt>
<dd>
value string (string)
</dd><dt><i>dtype</i></dt>
<dd>
type string (string)
</dd><dt><i>frmnr</i></dt>
<dd>
frame number (0 is the current frame) (int)
</dd><dt><i>scope</i></dt>
<dd>
flag indicating global (1) or local (0) variables
</dd>
</dl><a NAME="SpecialArrayElementVarItem.key" ID="SpecialArrayElementVarItem.key"></a>
<h4>SpecialArrayElementVarItem.key</h4>
<b>key</b>(<i>column</i>)
<p>
        Public method generating the key for this item.
</p><dl>
<dt><i>column</i></dt>
<dd>
the column to sort on (integer)
</dd>
</dl><dl>
<dt>Returns:</dt>
<dd>
key of the item (string)
</dd>
</dl>
<div align="right"><a href="#top">Up</a></div>
<hr /><hr />
<a NAME="SpecialVarItem" ID="SpecialVarItem"></a>
<h2>SpecialVarItem</h2>
<p>
    Class implementing a VariableItem that represents a special variable node.
</p><p>
    These special variable nodes are generated for classes, lists,
    tuples and dictionaries.
</p>
<h3>Derived from</h3>
VariableItem
<h3>Class Attributes</h3>
<table>
<tr><td>None</td></tr>
</table>
<h3>Class Methods</h3>
<table>
<tr><td>None</td></tr>
</table>
<h3>Methods</h3>
<table>
<tr>
<td><a href="#SpecialVarItem.__init__">SpecialVarItem</a></td>
<td>Constructor</td>
</tr><tr>
<td><a href="#SpecialVarItem.expand">expand</a></td>
<td>Public method to expand the item.</td>
</tr>
</table>
<h3>Static Methods</h3>
<table>
<tr><td>None</td></tr>
</table>
<a NAME="SpecialVarItem.__init__" ID="SpecialVarItem.__init__"></a>
<h4>SpecialVarItem (Constructor)</h4>
<b>SpecialVarItem</b>(<i>parent, dvar, dvalue, dtype, frmnr, scope</i>)
<p>
        Constructor
</p><dl>
<dt><i>parent</i></dt>
<dd>
parent of this item
</dd><dt><i>dvar</i></dt>
<dd>
variable name (string)
</dd><dt><i>dvalue</i></dt>
<dd>
value string (string)
</dd><dt><i>dtype</i></dt>
<dd>
type string (string)
</dd><dt><i>frmnr</i></dt>
<dd>
frame number (0 is the current frame) (int)
</dd><dt><i>scope</i></dt>
<dd>
flag indicating global (1) or local (0) variables
</dd>
</dl><a NAME="SpecialVarItem.expand" ID="SpecialVarItem.expand"></a>
<h4>SpecialVarItem.expand</h4>
<b>expand</b>(<i></i>)
<p>
        Public method to expand the item.
</p>
<div align="right"><a href="#top">Up</a></div>
<hr /><hr />
<a NAME="VariableItem" ID="VariableItem"></a>
<h2>VariableItem</h2>
<p>
    Class implementing the data structure for variable items.
</p>
<h3>Derived from</h3>
QTreeWidgetItem
<h3>Class Attributes</h3>
<table>
<tr><td>None</td></tr>
</table>
<h3>Class Methods</h3>
<table>
<tr><td>None</td></tr>
</table>
<h3>Methods</h3>
<table>
<tr>
<td><a href="#VariableItem.__init__">VariableItem</a></td>
<td>Constructor</td>
</tr><tr>
<td><a href="#VariableItem.__lt__">__lt__</a></td>
<td>Special method to check, if the item is less than the other one.</td>
</tr><tr>
<td><a href="#VariableItem.attachDummy">attachDummy</a></td>
<td>Public method to attach a dummy sub item to allow for lazy population.</td>
</tr><tr>
<td><a href="#VariableItem.collapse">collapse</a></td>
<td>Public method to collapse the item.</td>
</tr><tr>
<td><a href="#VariableItem.data">data</a></td>
<td>Public method to return the data for the requested role.</td>
</tr><tr>
<td><a href="#VariableItem.deleteChildren">deleteChildren</a></td>
<td>Public method to delete all children (cleaning the subtree).</td>
</tr><tr>
<td><a href="#VariableItem.expand">expand</a></td>
<td>Public method to expand the item.</td>
</tr><tr>
<td><a href="#VariableItem.getValue">getValue</a></td>
<td>Public method to return the value of the item.</td>
</tr><tr>
<td><a href="#VariableItem.key">key</a></td>
<td>Public method generating the key for this item.</td>
</tr>
</table>
<h3>Static Methods</h3>
<table>
<tr><td>None</td></tr>
</table>
<a NAME="VariableItem.__init__" ID="VariableItem.__init__"></a>
<h4>VariableItem (Constructor)</h4>
<b>VariableItem</b>(<i>parent, dvar, dvalue, dtype</i>)
<p>
        Constructor
</p><dl>
<dt><i>parent</i></dt>
<dd>
reference to the parent item
</dd><dt><i>dvar</i></dt>
<dd>
variable name (string)
</dd><dt><i>dvalue</i></dt>
<dd>
value string (string)
</dd><dt><i>dtype</i></dt>
<dd>
type string (string)
</dd>
</dl><a NAME="VariableItem.__lt__" ID="VariableItem.__lt__"></a>
<h4>VariableItem.__lt__</h4>
<b>__lt__</b>(<i>other</i>)
<p>
        Special method to check, if the item is less than the other one.
</p><dl>
<dt><i>other</i></dt>
<dd>
reference to item to compare against (QTreeWidgetItem)
</dd>
</dl><dl>
<dt>Returns:</dt>
<dd>
true, if this item is less than other (boolean)
</dd>
</dl><a NAME="VariableItem.attachDummy" ID="VariableItem.attachDummy"></a>
<h4>VariableItem.attachDummy</h4>
<b>attachDummy</b>(<i></i>)
<p>
        Public method to attach a dummy sub item to allow for lazy population.
</p><a NAME="VariableItem.collapse" ID="VariableItem.collapse"></a>
<h4>VariableItem.collapse</h4>
<b>collapse</b>(<i></i>)
<p>
        Public method to collapse the item.
</p><p>
        Note: This is just a do nothing and should be overwritten.
</p><a NAME="VariableItem.data" ID="VariableItem.data"></a>
<h4>VariableItem.data</h4>
<b>data</b>(<i>column, role</i>)
<p>
        Public method to return the data for the requested role.
</p><p>
        This implementation changes the original behavior in a way, that the
        display data is returned as the tooltip for column 1.
</p><dl>
<dt><i>column</i></dt>
<dd>
column number (integer)
</dd><dt><i>role</i></dt>
<dd>
data role (Qt.ItemDataRole)
</dd>
</dl><dl>
<dt>Returns:</dt>
<dd>
requested data
</dd>
</dl><a NAME="VariableItem.deleteChildren" ID="VariableItem.deleteChildren"></a>
<h4>VariableItem.deleteChildren</h4>
<b>deleteChildren</b>(<i></i>)
<p>
        Public method to delete all children (cleaning the subtree).
</p><a NAME="VariableItem.expand" ID="VariableItem.expand"></a>
<h4>VariableItem.expand</h4>
<b>expand</b>(<i></i>)
<p>
        Public method to expand the item.
</p><p>
        Note: This is just a do nothing and should be overwritten.
</p><a NAME="VariableItem.getValue" ID="VariableItem.getValue"></a>
<h4>VariableItem.getValue</h4>
<b>getValue</b>(<i></i>)
<p>
        Public method to return the value of the item.
</p><dl>
<dt>Returns:</dt>
<dd>
value of the item (string)
</dd>
</dl><a NAME="VariableItem.key" ID="VariableItem.key"></a>
<h4>VariableItem.key</h4>
<b>key</b>(<i>column</i>)
<p>
        Public method generating the key for this item.
</p><dl>
<dt><i>column</i></dt>
<dd>
the column to sort on (integer)
</dd>
</dl><dl>
<dt>Returns:</dt>
<dd>
text of the column (string)
</dd>
</dl>
<div align="right"><a href="#top">Up</a></div>
<hr /><hr />
<a NAME="VariablesViewer" ID="VariablesViewer"></a>
<h2>VariablesViewer</h2>
<p>
    Class implementing the variables viewer widget.
</p><p>
    This widget is used to display the variables of the program being
    debugged in a tree. Compound types will be shown with
    their main entry first. Once the subtree has been expanded, the
    individual entries will be shown. Double clicking an entry will
    popup a dialog showing the variables parameters in a more readable
    form. This is especially useful for lengthy strings.
</p><p>
    This widget has two modes for displaying the global and the local
    variables.
</p>
<h3>Derived from</h3>
QTreeWidget
<h3>Class Attributes</h3>
<table>
<tr><td>None</td></tr>
</table>
<h3>Class Methods</h3>
<table>
<tr><td>None</td></tr>
</table>
<h3>Methods</h3>
<table>
<tr>
<td><a href="#VariablesViewer.__init__">VariablesViewer</a></td>
<td>Constructor</td>
</tr><tr>
<td><a href="#VariablesViewer.__addItem">__addItem</a></td>
<td>Private method used to add an item to the list.</td>
</tr><tr>
<td><a href="#VariablesViewer.__buildTreePath">__buildTreePath</a></td>
<td>Private method to build up a path from the top to an item.</td>
</tr><tr>
<td><a href="#VariablesViewer.__configure">__configure</a></td>
<td>Private method to open the configuration dialog.</td>
</tr><tr>
<td><a href="#VariablesViewer.__createPopupMenus">__createPopupMenus</a></td>
<td>Private method to generate the popup menus.</td>
</tr><tr>
<td><a href="#VariablesViewer.__expandItemSignal">__expandItemSignal</a></td>
<td>Private slot to handle the expanded signal.</td>
</tr><tr>
<td><a href="#VariablesViewer.__findItem">__findItem</a></td>
<td>Private method to search for an item.</td>
</tr><tr>
<td><a href="#VariablesViewer.__generateItem">__generateItem</a></td>
<td>Private method used to generate a VariableItem.</td>
</tr><tr>
<td><a href="#VariablesViewer.__getDispType">__getDispType</a></td>
<td>Private method used to get the display string for type vtype.</td>
</tr><tr>
<td><a href="#VariablesViewer.__resort">__resort</a></td>
<td>Private method to resort the tree.</td>
</tr><tr>
<td><a href="#VariablesViewer.__showContextMenu">__showContextMenu</a></td>
<td>Private slot to show the context menu.</td>
</tr><tr>
<td><a href="#VariablesViewer.__showDetails">__showDetails</a></td>
<td>Private slot to show details about the selected variable.</td>
</tr><tr>
<td><a href="#VariablesViewer.__showVariableDetails">__showVariableDetails</a></td>
<td>Private method to show details about a variable.</td>
</tr><tr>
<td><a href="#VariablesViewer.collapseItem">collapseItem</a></td>
<td>Public slot to handle the collapsed signal.</td>
</tr><tr>
<td><a href="#VariablesViewer.expandItem">expandItem</a></td>
<td>Public slot to handle the expanded signal.</td>
</tr><tr>
<td><a href="#VariablesViewer.handleResetUI">handleResetUI</a></td>
<td>Public method to reset the VariablesViewer.</td>
</tr><tr>
<td><a href="#VariablesViewer.mouseDoubleClickEvent">mouseDoubleClickEvent</a></td>
<td>Protected method of QAbstractItemView.</td>
</tr><tr>
<td><a href="#VariablesViewer.showVariable">showVariable</a></td>
<td>Public method to show variables in a list.</td>
</tr><tr>
<td><a href="#VariablesViewer.showVariables">showVariables</a></td>
<td>Public method to show variables in a list.</td>
</tr>
</table>
<h3>Static Methods</h3>
<table>
<tr><td>None</td></tr>
</table>
<a NAME="VariablesViewer.__init__" ID="VariablesViewer.__init__"></a>
<h4>VariablesViewer (Constructor)</h4>
<b>VariablesViewer</b>(<i>parent=None, scope=1</i>)
<p>
        Constructor
</p><dl>
<dt><i>parent</i></dt>
<dd>
the parent (QWidget)
</dd><dt><i>scope</i></dt>
<dd>
flag indicating global (1) or local (0) variables
</dd>
</dl><a NAME="VariablesViewer.__addItem" ID="VariablesViewer.__addItem"></a>
<h4>VariablesViewer.__addItem</h4>
<b>__addItem</b>(<i>parent, vtype, var, value</i>)
<p>
        Private method used to add an item to the list.
</p><p>
        If the item is of a type with subelements (i.e. list, dictionary,
        tuple), these subelements are added by calling this method recursively.
</p><dl>
<dt><i>parent</i></dt>
<dd>
the parent of the item to be added
            (QTreeWidgetItem or None)
</dd><dt><i>vtype</i></dt>
<dd>
the type of the item to be added
            (string)
</dd><dt><i>var</i></dt>
<dd>
the variable name (string)
</dd><dt><i>value</i></dt>
<dd>
the value string (string)
</dd>
</dl><dl>
<dt>Returns:</dt>
<dd>
The item that was added to the listview (QTreeWidgetItem).
</dd>
</dl><a NAME="VariablesViewer.__buildTreePath" ID="VariablesViewer.__buildTreePath"></a>
<h4>VariablesViewer.__buildTreePath</h4>
<b>__buildTreePath</b>(<i>itm</i>)
<p>
        Private method to build up a path from the top to an item.
</p><dl>
<dt><i>itm</i></dt>
<dd>
item to build the path for (QTreeWidgetItem)
</dd>
</dl><dl>
<dt>Returns:</dt>
<dd>
list of names denoting the path from the top (list of strings)
</dd>
</dl><a NAME="VariablesViewer.__configure" ID="VariablesViewer.__configure"></a>
<h4>VariablesViewer.__configure</h4>
<b>__configure</b>(<i></i>)
<p>
        Private method to open the configuration dialog.
</p><a NAME="VariablesViewer.__createPopupMenus" ID="VariablesViewer.__createPopupMenus"></a>
<h4>VariablesViewer.__createPopupMenus</h4>
<b>__createPopupMenus</b>(<i></i>)
<p>
        Private method to generate the popup menus.
</p><a NAME="VariablesViewer.__expandItemSignal" ID="VariablesViewer.__expandItemSignal"></a>
<h4>VariablesViewer.__expandItemSignal</h4>
<b>__expandItemSignal</b>(<i>parentItem</i>)
<p>
        Private slot to handle the expanded signal.
</p><dl>
<dt><i>parentItem</i></dt>
<dd>
reference to the item being expanded
            (QTreeWidgetItem)
</dd>
</dl><a NAME="VariablesViewer.__findItem" ID="VariablesViewer.__findItem"></a>
<h4>VariablesViewer.__findItem</h4>
<b>__findItem</b>(<i>slist, column, node=None</i>)
<p>
        Private method to search for an item.
</p><p>
        It is used to find a specific item in column,
        that is a child of node. If node is None, a child of the
        QTreeWidget is searched.
</p><dl>
<dt><i>slist</i></dt>
<dd>
searchlist (list of strings)
</dd><dt><i>column</i></dt>
<dd>
index of column to search in (int)
</dd><dt><i>node</i></dt>
<dd>
start point of the search
</dd>
</dl><dl>
<dt>Returns:</dt>
<dd>
the found item or None
</dd>
</dl><a NAME="VariablesViewer.__generateItem" ID="VariablesViewer.__generateItem"></a>
<h4>VariablesViewer.__generateItem</h4>
<b>__generateItem</b>(<i>parent, dvar, dvalue, dtype, isSpecial=False</i>)
<p>
        Private method used to generate a VariableItem.
</p><dl>
<dt><i>parent</i></dt>
<dd>
parent of the item to be generated
</dd><dt><i>dvar</i></dt>
<dd>
variable name (string)
</dd><dt><i>dvalue</i></dt>
<dd>
value string (string)
</dd><dt><i>dtype</i></dt>
<dd>
type string (string)
</dd><dt><i>isSpecial</i></dt>
<dd>
flag indicating that a special node should be
            generated (boolean)
</dd>
</dl><dl>
<dt>Returns:</dt>
<dd>
The item that was generated (VariableItem).
</dd>
</dl><a NAME="VariablesViewer.__getDispType" ID="VariablesViewer.__getDispType"></a>
<h4>VariablesViewer.__getDispType</h4>
<b>__getDispType</b>(<i>vtype</i>)
<p>
        Private method used to get the display string for type vtype.
</p><dl>
<dt><i>vtype</i></dt>
<dd>
the type, the display string should be looked up for
              (string)
</dd>
</dl><dl>
<dt>Returns:</dt>
<dd>
displaystring (string)
</dd>
</dl><a NAME="VariablesViewer.__resort" ID="VariablesViewer.__resort"></a>
<h4>VariablesViewer.__resort</h4>
<b>__resort</b>(<i></i>)
<p>
        Private method to resort the tree.
</p><a NAME="VariablesViewer.__showContextMenu" ID="VariablesViewer.__showContextMenu"></a>
<h4>VariablesViewer.__showContextMenu</h4>
<b>__showContextMenu</b>(<i>coord</i>)
<p>
        Private slot to show the context menu.
</p><dl>
<dt><i>coord</i></dt>
<dd>
the position of the mouse pointer (QPoint)
</dd>
</dl><a NAME="VariablesViewer.__showDetails" ID="VariablesViewer.__showDetails"></a>
<h4>VariablesViewer.__showDetails</h4>
<b>__showDetails</b>(<i></i>)
<p>
        Private slot to show details about the selected variable.
</p><a NAME="VariablesViewer.__showVariableDetails" ID="VariablesViewer.__showVariableDetails"></a>
<h4>VariablesViewer.__showVariableDetails</h4>
<b>__showVariableDetails</b>(<i>itm</i>)
<p>
        Private method to show details about a variable.
</p><dl>
<dt><i>itm</i></dt>
<dd>
reference to the variable item
</dd>
</dl><a NAME="VariablesViewer.collapseItem" ID="VariablesViewer.collapseItem"></a>
<h4>VariablesViewer.collapseItem</h4>
<b>collapseItem</b>(<i>parentItem</i>)
<p>
        Public slot to handle the collapsed signal.
</p><dl>
<dt><i>parentItem</i></dt>
<dd>
reference to the item being collapsed
            (QTreeWidgetItem)
</dd>
</dl><a NAME="VariablesViewer.expandItem" ID="VariablesViewer.expandItem"></a>
<h4>VariablesViewer.expandItem</h4>
<b>expandItem</b>(<i>parentItem</i>)
<p>
        Public slot to handle the expanded signal.
</p><dl>
<dt><i>parentItem</i></dt>
<dd>
reference to the item being expanded
            (QTreeWidgetItem)
</dd>
</dl><a NAME="VariablesViewer.handleResetUI" ID="VariablesViewer.handleResetUI"></a>
<h4>VariablesViewer.handleResetUI</h4>
<b>handleResetUI</b>(<i></i>)
<p>
        Public method to reset the VariablesViewer.
</p><a NAME="VariablesViewer.mouseDoubleClickEvent" ID="VariablesViewer.mouseDoubleClickEvent"></a>
<h4>VariablesViewer.mouseDoubleClickEvent</h4>
<b>mouseDoubleClickEvent</b>(<i>mouseEvent</i>)
<p>
        Protected method of QAbstractItemView.
</p><p>
        Reimplemented to disable expanding/collapsing of items when
        double-clicking. Instead the double-clicked entry is opened.
</p><dl>
<dt><i>mouseEvent</i></dt>
<dd>
the mouse event object (QMouseEvent)
</dd>
</dl><a NAME="VariablesViewer.showVariable" ID="VariablesViewer.showVariable"></a>
<h4>VariablesViewer.showVariable</h4>
<b>showVariable</b>(<i>vlist</i>)
<p>
        Public method to show variables in a list.
</p><dl>
<dt><i>vlist</i></dt>
<dd>
the list of subitems to be displayed.
                The first element gives the path of the
                parent variable. Each other listentry is
                a tuple of three values.
                <ul>
                <li>the variable name (string)</li>
                <li>the variables type (string)</li>
                <li>the variables value (string)</li>
                </ul>
</dd>
</dl><a NAME="VariablesViewer.showVariables" ID="VariablesViewer.showVariables"></a>
<h4>VariablesViewer.showVariables</h4>
<b>showVariables</b>(<i>vlist, frmnr</i>)
<p>
        Public method to show variables in a list.
</p><dl>
<dt><i>vlist</i></dt>
<dd>
the list of variables to be displayed. Each
                listentry is a tuple of three values.
                <ul>
                <li>the variable name (string)</li>
                <li>the variables type (string)</li>
                <li>the variables value (string)</li>
                </ul>
</dd><dt><i>frmnr</i></dt>
<dd>
frame number (0 is the current frame) (int)
</dd>
</dl>
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