在 Python 中访问特定属性时遇到问题

Question

模块：https ://github.com/yanagisawa-kentaro-777/pybitmex/blob/master/pybitmex/bitmex.py我正在使用ws_open_order_objects_of_account()它，我可以访问：open_orders = bitmex.ws_open_order_objects_of_account()for open_bid in open_orders.bids:    print(open_bid.price)但我想要open_bid.orderID并且我已经尝试过open_bid['orderID']不可下标的。我是否正在阅读它只返回价格的功能？

Answer 1

当您遇到这样的情况时，我建议您使用 Python 内省工具，例如dir(open_bid)和type(open_bid)来找出您正在查看的内容！

基于对源代码的快速阅读，我怀疑您正在查看

class OpenOrder:

    def __init__(self, order_id, client_order_id, side, quantity, price, timestamp):

        self.order_id = order_id

        self.client_order_id = client_order_id

        self.side = side

        self.quantity = quantity

        self.price = price

        self.timestamp = timestamp

    def __str__(self):

        return "Side: {}; Quantity: {:d}; Price: {:.1f}; OrderID: {}; ClOrdID: {}; Timestamp: {}; ".format(

            self.side, self.quantity, self.price, self.order_id, self.client_order_id,

            self.timestamp.strftime("%Y%m%d_%H%M%S")

        )

所以你可能想要open_bid.order_id

https://github.com/yanagisawa-kentaro-777/pybitmex/blob/08e6c4e7ae7bbadd5208ec01fd8d361c3a0ce992/pybitmex/models.py#L33

有关内省 Python 中发生的事情的方法的更多信息：

https://docs.python.org/3/library/functions.html?highlight=dir#dir

https://docs.python.org/3/library/functions.html?highlight=dir#locals

https://docs.python.org/3/library/functions.html?highlight=dir#globals

https://docs.python.org/3/library/functions.html?highlight=dir#vars

https://docs.python.org/3/library/inspect.html

Answer 2

查看函数的文档字符串：

        """

        [{'orderID': '57180f5f-d16a-62d6-ff8d-d1430637a8d9',

        'clOrdID': '', 'clOrdLinkID': '',

        'account': XXXXX, 'symbol': 'XBTUSD', 'side': 'Sell',

        'simpleOrderQty': None,

        'orderQty': 30, 'price': 3968,

        'displayQty': None, 'stopPx': None, 'pegOffsetValue': None,

        'pegPriceType': '', 'currency': 'USD', 'settlCurrency': 'XBt',

        'ordType': 'Limit', 'timeInForce': 'GoodTillCancel',

        'execInst': 'ParticipateDoNotInitiate', 'contingencyType': '',

        'exDestination': 'XBME', 'ordStatus': 'New', 'triggered': '',

        'workingIndicator': True, 'ordRejReason': '', 'simpleLeavesQty': None,

        'leavesQty': 30, 'simpleCumQty': None, 'cumQty': 0, 'avgPx': None,

        'multiLegReportingType': 'SingleSecurity', 'text': 'Submission from www.bitmex.com',

        'transactTime': '2019-03-25T07:10:34.290Z', 'timestamp': '2019-03-25T07:10:34.290Z'}]

        """

这表明它返回一个字典列表，而不是一个对象。没有bids您需要访问的属性。

open_orders = bitmex.ws_open_order_objects_of_account()

for order in open_orders:

    print(order['price'])