Execute Query on SQL Server Analysis Services with Ironpython

Execute query on SQL Server Analysis Services with IronPython

its better use Microsoft.AnalysisServices.AdomdClient.dll and mdx query.
and set query result in Datasets in Ststem.Data assembly
something like this:

clr.AddReference ("Microsoft.AnalysisServices.AdomdClient.dll")
clr.AddReference ("System.Data")

from Microsoft.AnalysisServices.AdomdClient import AdomdConnection , AdomdDataAdapter
from System.Data import DataSet

conn = AdomdConnection("Data Source=0.0.0.0;Catalog=MyCatalog;")
conn.Open()
cmd = conn.CreateCommand()
cmd.CommandText = "your mdx query" # in your case 'select from finance'
adp = AdomdDataAdapter(cmd)
datasetParam =  DataSet()
adp.Fill(datasetParam)
conn.Close();

# datasetParam hold your result as collection a\of tables
# each tables has rows
# and each row has columns
print datasetParam.Tables[0].Rows[0][0]

Python Connect to Microsoft Analysis Service

Well just Googling around it seems that the library IronPython will be useful

Execute query on SQL Server Analysis Services with IronPython

Extracting raw data from a PowerPivot model using Python

Lo and behold, I finally managed to crack the problem - turns out that accessing Power Pivot data using Python is indeed possible! Below's a short recap of what I did - you can find a more detailed description here: Analysis Services (SSAS) on a shoestring. Note: the code has been optimized neither for efficiency nor elegance.

• Install Microsoft Power BI Desktop (comes with free Analysis Services server, so no need for a costly SQL Server license - however, the same approach obviously also works if you have a proper license).
• Fire up the AS engine by first creating the msmdsrv.ini settings file, then restore the database from the ABF file (using AMO.NET), then extract data using ADOMD.NET.

Here's the Python code that illustrates the AS engine + AMO.NET parts:

import psutil, subprocess, random, os, zipfile, shutil, clr, sys, pandas

def initialSetup(pathPowerBI):
    sys.path.append(pathPowerBI)

    #required Analysis Services assemblies
    clr.AddReference("Microsoft.PowerBI.Amo.Core")
    clr.AddReference("Microsoft.PowerBI.Amo")     
    clr.AddReference("Microsoft.PowerBI.AdomdClient")

    global AMO, ADOMD
    import Microsoft.AnalysisServices as AMO
    import Microsoft.AnalysisServices.AdomdClient as ADOMD

def restorePowerPivot(excelName, pathTarget, port, pathPowerBI):   
    #create random folder
    os.chdir(pathTarget)
    folder = os.getcwd()+str(random.randrange(10**6, 10**7))
    os.mkdir(folder)

    #extract PowerPivot model (abf backup)
    archive = zipfile.ZipFile(excelName)
    for member in archive.namelist():
        if ".data" in member:
            filename = os.path.basename(member)
            abfname = os.path.join(folder, filename) + ".abf"
            source = archive.open(member)
            target = file(os.path.join(folder, abfname), 'wb')
            shutil.copyfileobj(source, target)
            del target
    archive.close()

    #start the cmd.exe process to get its PID
    listPIDpre = [proc for proc in psutil.process_iter()]
    process = subprocess.Popen('cmd.exe /k', stdin=subprocess.PIPE)
    listPIDpost = [proc for proc in psutil.process_iter()]
    pid = [proc for proc in listPIDpost if proc not in listPIDpre if "cmd.exe" in str(proc)][0]
    pid = str(pid).split("=")[1].split(",")[0]

    #msmdsrv.ini
    msmdsrvText = '''<ConfigurationSettings>
       <DataDir>{0}</DataDir>
       <TempDir>{0}</TempDir>
       <LogDir>{0}</LogDir>
       <BackupDir>{0}</BackupDir>
       <DeploymentMode>2</DeploymentMode>
       <RecoveryModel>1</RecoveryModel>
       <DisklessModeRequested>0</DisklessModeRequested>
       <CleanDataFolderOnStartup>1</CleanDataFolderOnStartup>
       <AutoSetDefaultInitialCatalog>1</AutoSetDefaultInitialCatalog>
       <Network>
          <Requests>
             <EnableBinaryXML>1</EnableBinaryXML>
             <EnableCompression>1</EnableCompression>
          </Requests>
          <Responses>
             <EnableBinaryXML>1</EnableBinaryXML>
             <EnableCompression>1</EnableCompression>
             <CompressionLevel>9</CompressionLevel>
          </Responses>
          <ListenOnlyOnLocalConnections>1</ListenOnlyOnLocalConnections>
       </Network>
       <Port>{1}</Port>
       <PrivateProcess>{2}</PrivateProcess>
       <InstanceVisible>0</InstanceVisible>
       <Language>1033</Language>
       <Debug>
          <CallStackInError>0</CallStackInError>
       </Debug>
       <Log>
          <Exception>
             <CrashReportsFolder>{0}</CrashReportsFolder>
          </Exception>
          <FlightRecorder>
             <Enabled>0</Enabled>
          </FlightRecorder>
       </Log>
       <AllowedBrowsingFolders>{0}</AllowedBrowsingFolders>
       <ResourceGovernance>
          <GovernIMBIScheduler>0</GovernIMBIScheduler>
       </ResourceGovernance>
       <Feature>
          <ManagedCodeEnabled>1</ManagedCodeEnabled>
       </Feature>
       <VertiPaq>
          <EnableDisklessTMImageSave>0</EnableDisklessTMImageSave>
          <EnableProcessingSimplifiedLocks>1</EnableProcessingSimplifiedLocks>
       </VertiPaq>
    </ConfigurationSettings>'''

    #save ini file to disk, fill it with required parameters
    msmdsrvini = open(folder+"\\msmdsrv.ini", "w")
    msmdsrvText = msmdsrvText.format(folder, port, pid) #{0},{1},{2}
    msmdsrvini.write(msmdsrvText)
    msmdsrvini.close()

    #run AS engine inside the cmd.exe process
    initString = "\"{0}\\msmdsrv.exe\" -c -s \"{1}\""
    initString = initString.format(pathPowerBI.replace("/","\\"),folder)
    process.stdin.write(initString + " \n")

    #connect to the AS instance from Python
    AMOServer = AMO.Server()
    AMOServer.Connect("localhost:{0}".format(port))

    #restore database from PowerPivot abf backup, disconnect
    AMORestoreInfo = AMO.RestoreInfo(os.path.join(folder, abfname))
    AMOServer.Restore(AMORestoreInfo)
    AMOServer.Disconnect()

    return process

And the data-extraction part:

def runQuery(query, port, flag):
    #ADOMD assembly
    ADOMDConn = ADOMD.AdomdConnection("Data Source=localhost:{0}".format(port))
    ADOMDConn.Open()
    ADOMDCommand = ADOMDConn.CreateCommand() 
    ADOMDCommand.CommandText = query

    #read data in via AdomdDataReader object
    DataReader = ADOMDCommand.ExecuteReader()

    #get metadata, number of columns
    SchemaTable = DataReader.GetSchemaTable()
    numCol = SchemaTable.Rows.Count #same as DataReader.FieldCount

    #get column names
    columnNames = []
    for i in range(numCol):
        columnNames.append(str(SchemaTable.Rows[i][0]))

    #fill with data
    data = []
    while DataReader.Read()==True:
        row = []
        for j in range(numCol):
            try:
                row.append(DataReader[j].ToString())
            except:
                row.append(DataReader[j])
        data.append(row)
    df = pandas.DataFrame(data)
    df.columns = columnNames 

    if flag==0:
        DataReader.Close()
        ADOMDConn.Close()

        return df     
    else:   
        #metadata table
        metadataColumnNames = []
        for j in range(SchemaTable.Columns.Count):
            metadataColumnNames.append(SchemaTable.Columns[j].ToString())
        metadata = []
        for i in range(numCol):
            row = []
            for j in range(SchemaTable.Columns.Count):
                try:
                    row.append(SchemaTable.Rows[i][j].ToString())
                except:
                    row.append(SchemaTable.Rows[i][j])
            metadata.append(row)
        metadf = pandas.DataFrame(metadata)
        metadf.columns = metadataColumnNames

        DataReader.Close()
        ADOMDConn.Close()

        return df, metadf

The raw data are then extracted via something like this:

pathPowerBI = "C:/Program Files/Microsoft Power BI Desktop/bin"
initialSetup(pathPowerBI)
session = restorePowerPivot("D:/Downloads/PowerPivotTutorialSample.xlsx", "D:/", 60000, pathPowerBI)
df, metadf = runQuery("EVALUATE dbo_DimProduct", 60000, 1)
endSession(session)

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