How to check if a limit order is filled?

[vuanhduy]

My current temporary solution is to compare the size and price of the order with one in trades and closed_trades. A sample code is:

class MyStrategy(Strategy):
    position = 0
    tp_order = None
    tp_price = 0.0
   
    def next(self):
         if self.position > 0:
             if tp_order is not None:
                 # check if tp order if filled?
                 if (self.trades[-1].size = -self.position and self.trades[-1].entry_price == tp_price) or (self.closed_trades[-1].size = -self.position and self.closed_trades[-1].entry_price == tp_price):
                     position = 0
                     tp_order = None
             else:
                 # place tp_order
                 tp_order = self.sell(size = self.position, limit=self.tp_price)
        else:
            # calculate the entry price
            entry_price = ....
            qty=..
            buy_order = self.buy(qty, limit=entry_price)
            ...

Is there any better way to check if the limit order (i.e., tp_order in my example) is filled?
I suggest to have __eq__ function in Order class..