code: def show_calltip(self, signature, doc='', parameter='', parameter_doc='',
                       color=_DEFAULT_TITLE_COLOR, is_python=False):
          
          # Find position of calltip
          point = self._calculate_position()
  
          # Format text
          tiptext, wrapped_lines = self._format_signature(
              signature,
              doc,
              parameter,
              parameter_doc,
              color,
              is_python,
          )
  
          self._update_stylesheet(self.calltip_widget)
  
          # Show calltip
          self.calltip_widget.show_tip(point, tiptext, wrapped_lines)
docs: Show calltip.
  
          Calltips look like tooltips but will not disappear if mouse hovers
          them. They are useful for displaying signature information on methods
          and functions.