How to use the rebound.clibrebound._reb_copy_simulation_with_messages function in rebound

def copy(self):
        """
        Returns a deep copy of a REBOUND simulation. You need to reset 
        any function pointers on the copy. 
        
        Returns
        ------- 
        A rebound.Simulation object.
        
        """
        w = c_int(0)
        sim = Simulation()
        clibrebound._reb_copy_simulation_with_messages(byref(sim),byref(self),byref(w))
        for majorerror, value, message in BINARY_WARNINGS:
            if w.value & value:
                if majorerror:
                    raise RuntimeError(message)
                else:  
                    # Just a warning
                    warnings.warn(message, RuntimeWarning)
        return sim