import pymssql
conn = pymssql.connect(host='szs',server='SZS\SQLEXPRESS',port='51091', user='python', password='python', database='python',charset='utf8',autocommit=True)
cur = conn.cursor()
sql = "insert into [novals] values ('python','python','python','python');COMMIT "
try:
  cur.execute(sql)
except:
  conn.rollback()
cur.close()
conn.close()

conn.execute("insert into ....; commit")