Question

I have the following code to query a database using an ADO COMObject in python. This is connecting to a Time series database (OSIPI) and this is the only way we’ve been able to get Python connected to the database.

from win32com.client import Dispatch

oConn = Dispatch('ADODB.Connection')
oRS = Dispatch('ADODB.RecordSet')
oConn.ConnectionString = <my connection string>
oConn.Open()
oRS.ActiveConnection = oConn
if oConn.State == adStateOpen:
    print "Connected to DB"
else:
    raise SystemError('Database Connection Failed')

cmd = """SELECT tag, dataowner FROM pipoint WHERE tag LIKE 'TEST_TAG1%'"""  

self.oRS.Open(cmd)
result = oRS.GetRows(1) 
print result

result2 = oRS.GetRows(2)    
print result2

if oConn.State == adStateOpen: 
    oConn.Close()
oConn = None 

This code returns the following two lines as results to the query:

result ((u'TEST_TAG1.QTY.BLACK',), (u'piadmin',))
result2 = ((u'TEST_TAG1.QTY.BLACK', u'TEST_TAG1.QTY.PINK'), (u'piadmin', u'piuser'))

This is not the expected format. In this case, I was expecting something like this:

result = ((u'TEST_TAG1.QTY.BLACK',u'piadmin'))
result2 = ((u'TEST_TAG1.QTY.BLACK',u'piadmin'), 
            (u'TEST_TAG1.QTY.PINK',u'piuser'))

Is there a way to adjust the results of an ADO query so everything related to row 1 is in the same tuple and everything in row 2 is in the same tuple?

Answer 1

What you’re seeing is not really a Python thing but the output of GetRows(), which returns a two-dimensional array, which is organized by by field and then row.

Fortunately, Python has the zip() function that will make the relevant change for you. Try changing your code from:

result = oRS.GetRows(1)

to:

result = zip(*oRS.GetRows(1))

etc.