Python：E1136：值“self.exchange.get_portfolio”是不可訂閱的

Question

def get_portfolio(self):
        contracts = settings.CONTRACTS
        portfolio = {}
        for symbol in contracts:
            position = self.bitmex.position(symbol=symbol)
            instrument = self.bitmex.instrument(symbol=symbol)

        if instrument['isQuanto']:
            future_type = "Quanto"
        elif instrument['isInverse']:
            future_type = "Inverse"
        elif not instrument['isQuanto'] and not instrument['isInverse']:
            future_type = "Linear"
        else:
            raise NotImplementedError("Unknown future type; not quanto or inverse: %s" % instrument['symbol'])

        if instrument['underlyingToSettleMultiplier'] is None:
            multiplier = float(instrument['multiplier']) / float(instrument['quoteToSettleMultiplier'])
        else:
            multiplier = float(instrument['multiplier']) / float(instrument['underlyingToSettleMultiplier'])

        portfolio[symbol] = {
            "currentQty": float(position['currentQty']),
            "futureType": future_type,
            "multiplier": multiplier,
            "markPrice": float(instrument['markPrice']),
            "spot": float(instrument['indicativeSettlePrice'])
        }

    return portfolio



qty = self.exchange.get_portfolio['currentQty']()

有人知道我在調用 get_portfolio 函數時做錯了什么，因為我不斷收到以下錯誤消息：

E1136:Value 'self.exchange.get_portfolio' is unsubscriptable

Answer 1

您在通話中有一個小錯誤：

self.exchange.get_portfolio是一個函數，因此您首先必須調用它， 然后才能引用返回的dict中的條目。

哦，我剛剛看到，您還必須在前面插入symbol ：

qty = self.exchange.get_portfolio()[<YOUR_SYMBOL>]['currentQty']

如果您不知道這些符號，則可以使用keys函數，該函數列出了字典的所有鍵：

port = self.exchange.get_portfolio()
port_keys = port.keys()
qty = port[port_keys[<SOME KEY NUMBER>]]['currentQty']

Answer 2

您應該按照以下步驟進行操作：

qty = self.exchange.get_portfolio()
qty = qty[qty.keys()[0]]['currentQty']

或單行：

qty = self.exchange.get_portfolio()[self.exchange.get_portfolio().keys()[0]]['currentQty']

Answer 3

如何調用函數？ 嘗試了各種各樣的排列，但沒有到達任何地方