code: def width(self, width=None):
          
  
          if width is None:
              return self._width
          else:
              if not is_numeric(width):
                  raise TypeError("width must be numeric, not '%s'" % str(width))
              self._width = width
docs: Returns or sets (if a value is provided) the chart's width.
  
          :param width: If given, the chart's width will be set to this.