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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def show_calltip(self, signature, doc='', parameter='', parameter_doc='',
 color=_DEFAULT_TITLE_COLOR, is_python=False):

 """
 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.
 """

        # 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)