使用 Python 通过 Bloomberg 的新数据 API (COM v3) 进行异步数据？
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Asynchronous data through Bloomberg's new data API (COM v3) with Python?
提问by c00kiemonster
Does anyone know how to get asynchronous data through Bloomberg's new data API (COM v3) with Python? I found this code below on wilmott.com and it works just fine, but it's for the old API version.
有谁知道如何使用 Python 通过 Bloomberg 的新数据 API (COM v3) 获取异步数据？我在 wilmott.com 上找到了下面的这段代码，它工作得很好，但它适用于旧的 API 版本。
Does anyone know the corresponding code for the new version?
有谁知道新版本对应的代码吗？
from win32com.client import DispatchWithEvents
from pythoncom import PumpWaitingMessages, Empty, Missing
from time import time
class BBCommEvent:
def OnData(self, Security, cookie, Fields, Data, Status):
print 'OnData: ' + `Data`
def OnStatus(self, Status, SubStatus, StatusDescription):
print 'OnStatus'
class TestAsync:
def __init__(self):
clsid = '{F2303261-4969-11D1-B305-00805F815CBF}'
progid = 'Bloomberg.Data.1'
print 'connecting to BBComm'
blp = DispatchWithEvents(clsid, BBCommEvent)
blp.AutoRelease = False
blp.Subscribe('EUR Curncy', 1, 'LAST_PRICE', Results = Empty)
blp.Flush()
end_time = time() + 5
while 1:
PumpWaitingMessages()
if end_time < time():
print 'timed out'
break
if __name__ == "__main__":
ta = TestAsync()
回答by c00kiemonster
I finally figured it out. I did a fair bit of combrowse.py detective work, and I compared with the JAVA, C, C++, and .NET examples in the BBG API download. Interestingly enough the Bloomberg Helpdesk people knew pretty much null when it came to these things, or perhaps I was just talking to the wrong person.
我终于弄明白了。我做了相当多的 combrowse.py 侦探工作，并与 BBG API 下载中的 JAVA、C、C++ 和 .NET 示例进行了比较。有趣的是，Bloomberg Helpdesk 的人对这些事情几乎一无所知，或者也许我只是在和错误的人交谈。
Here is my code.
这是我的代码。
asynchronousHandler.py:
异步处理程序.py：
import win32com.client
from pythoncom import PumpWaitingMessages
from time import time, strftime
import constants
class EventHandler:
def OnProcessEvent(self, result):
event = win32com.client.gencache.EnsureDispatch(result)
if event.EventType == constants.SUBSCRIPTION_DATA:
self.getData(event)
elif event.EventType == constants.SUBSCRIPTION_STATUS:
self.getStatus(event)
else:
self.getMisc(event)
def getData(self, event):
iterator = event.CreateMessageIterator()
while iterator.Next():
message = iterator.Message
dataString = ''
for fieldIndex, field in enumerate(constants.fields):
if message.AsElement.HasElement(field):
element = message.GetElement(field)
if element.IsNull:
theValue = ''
else:
theValue = ', Value: ' + str(element.Value)
dataString = dataString + ', (Type: ' + element.Name + theValue + ')'
print strftime('%m/%d/%y %H:%M:%S') + ', MessageType: ' + message.MessageTypeAsString + ', CorrelationId: ' + str(message.CorrelationId) + dataString
def getMisc(self, event):
iterator = event.CreateMessageIterator()
while iterator.Next():
message = iterator.Message
print strftime('%m/%d/%y %H:%M:%S') + ', MessageType: ' + message.MessageTypeAsString
def getStatus(self, event):
iterator = event.CreateMessageIterator()
while iterator.Next():
message = iterator.Message
if message.AsElement.HasElement('reason'):
element = message.AsElement.GetElement('reason')
print strftime('%m/%d/%y %H:%M:%S') + ', MessageType: ' + message.MessageTypeAsString + ', CorrelationId: ' + str(message.CorrelationId) + ', Category: ' + element.GetElement('category').Value + ', Description: ' + element.GetElement('description').Value
if message.AsElement.HasElement('exceptions'):
element = message.AsElement.GetElement('exceptions')
exceptionString = ''
for n in range(element.NumValues):
exceptionInfo = element.GetValue(n)
fieldId = exceptionInfo.GetElement('fieldId')
reason = exceptionInfo.GetElement('reason')
exceptionString = exceptionString + ', (Field: ' + fieldId.Value + ', Category: ' + reason.GetElement('category').Value + ', Description: ' + reason.GetElement('description').Value + ') '
print strftime('%m/%d/%y %H:%M:%S') + ', MessageType: ' + message.MessageTypeAsString + ', CorrelationId: ' + str(message.CorrelationId) + exceptionString
class bloombergSource:
def __init__(self):
session = win32com.client.DispatchWithEvents('blpapicom.Session' , EventHandler)
session.Start()
started = session.OpenService('//blp/mktdata')
subscriptions = session.CreateSubscriptionList()
for tickerIndex, ticker in enumerate(constants.tickers):
if len(constants.interval) > 0:
subscriptions.AddEx(ticker, constants.fields, constants.interval, session.CreateCorrelationId(tickerIndex))
else:
subscriptions.Add(ticker, constants.fields, session.CreateCorrelationId(tickerIndex))
session.Subscribe(subscriptions)
endTime = time() + 2
while True:
PumpWaitingMessages()
if endTime < time():
break
if __name__ == "__main__":
aBloombergSource = bloombergSource()
constants.py:
常量.py：
ADMIN = 1
AUTHORIZATION_STATUS = 11
BLPSERVICE_STATUS = 9
PARTIAL_RESPONSE = 6
PUBLISHING_DATA = 13
REQUEST_STATUS = 4
RESOLUTION_STATUS = 12
RESPONSE = 5
SESSION_STATUS = 2
SUBSCRIPTION_DATA = 8
SUBSCRIPTION_STATUS = 3
TIMEOUT = 10
TOKEN_STATUS = 15
TOPIC_STATUS = 14
UNKNOWN = -1
fields = ['BID']
tickers = ['AUD Curncy']
interval = '' #'interval=5.0'
For historical data I used this simple script:
对于历史数据，我使用了这个简单的脚本：
import win32com.client
session = win32com.client.Dispatch('blpapicom.Session')
session.QueueEvents = True
session.Start()
started = session.OpenService('//blp/refdata')
dataService = session.GetService('//blp/refdata')
request = dataService.CreateRequest('HistoricalDataRequest')
request.GetElement('securities').AppendValue('5 HK Equity')
request.GetElement('fields').AppendValue('PX_LAST')
request.Set('periodicitySelection', 'DAILY')
request.Set('startDate', '20090119')
request.Set('endDate', '20090130')
cid = session.SendRequest(request)
ADMIN = 1
AUTHORIZATION_STATUS = 11
BLPSERVICE_STATUS = 9
PARTIAL_RESPONSE = 6
PUBLISHING_DATA = 13
REQUEST_STATUS = 4
RESOLUTION_STATUS = 12
RESPONSE = 5
SESSION_STATUS = 2
SUBSCRIPTION_DATA = 8
SUBSCRIPTION_STATUS = 3
TIMEOUT = 10
TOKEN_STATUS = 15
TOPIC_STATUS = 14
UNKNOWN = -1
stayHere = True
while stayHere:
event = session.NextEvent();
if event.EventType == PARTIAL_RESPONSE or event.EventType == RESPONSE:
iterator = event.CreateMessageIterator()
iterator.Next()
message = iterator.Message
securityData = message.GetElement('securityData')
securityName = securityData.GetElement('security')
fieldData = securityData.GetElement('fieldData')
returnList = [[0 for col in range(fieldData.GetValue(row).NumValues+1)] for row in range(fieldData.NumValues)]
for row in range(fieldData.NumValues):
rowField = fieldData.GetValue(row)
for col in range(rowField.NumValues+1):
colField = rowField.GetElement(col)
returnList[row][col] = colField.Value
stayHere = False
break
element = None
iterator = None
message = None
event = None
session = None
print returnList
回答by VV.
For it to work you need to install Bloomberg Desktop v3 API SDK, I did that, restarted my machine, seems to work. Without the restart it just crashed.
为了让它工作，你需要安装 Bloomberg Desktop v3 API SDK，我这样做了，重新启动了我的机器，似乎可以工作。没有重新启动它就崩溃了。
If you use Com explorer, you will see the bloomberg elements are now present
如果您使用 Com explorer，您将看到现在出现了bloomberg 元素
