pyodbc nextset issue

import traceback
import pyodbc

db = pyodbc.connect (r"Driver={SQL Server};Server=SVR17;Database=TDI;TrustedConnection=Yes")

def test_sql (sql):
  q = db.cursor ()
  try:
    q.execute (sql)
    print q.fetchall ()
    print q.nextset ()
    print q.fetchall ()
  except pyodbc.Error:
    print "ERROR:", traceback.format_exc ()
  finally:
    q.close ()

print
print "SELECT-SELECT"
test_sql ("""
SELECT 1
SELECT 2
""")

print
print "SELECT-INSERT-SELECT"
test_sql ("""
DECLARE @t TABLE (i INT)
SELECT 1
INSERT INTO @t VALUES (1)
SELECT 2
""")

print
print "SELECT-INSERT-SELECT NOCOUNT"
test_sql ("""
SET NOCOUNT ON
DECLARE @t TABLE (i INT)
SELECT 1
INSERT INTO @t VALUES (1)
SELECT 2
""")

print
print "SELECT-PRINT-SELECT"
test_sql ("""
SELECT 1
PRINT 'Hello'
SELECT 2
""")

print
print "SELECT-RAISERROR-SELECT"
test_sql ("""
SELECT 1
RAISERROR ('ERROR', 16, 1)
SELECT 2
""")