Python connecting to MS SQL Server 2008

def adodbapi_connection (server, database, username, password):
import adodbapi
connectors = ["Provider=SQLOLEDB"]
connectors.append ("Data Source=%s" % server)
connectors.append ("Initial Catalog=%s" % database)
if username:
connectors.append ("User Id=%s" % username)
connectors.append ("Password=%s" % password)
else:
connectors.append("Integrated Security=SSPI")
return adodbapi.connect (";".join (connectors))

def pymssql_connection (server, database, username, password):
import pymssql
if not username:
raise RuntimeError, "Unable to use NT authentication for pymssql"
return pymssql.connect (user=username, password=password,
host=server, database=database)

def pyodbc_connection (server, database, username, password):
import pyodbc
connectors = ["Driver={SQL Server}"]
connectors.append ("Server=%s" % server)
connectors.append ("Database=%s" % database)
if username:
connectors.append ("UID=%s" % username)
connectors.append ("PWD=%s" % password)
else:
connectors.append ("TrustedConnection=Yes")
return pyodbc.connect (";".join (connectors))