python插入sql错误

当我试图通过SQL将python代码中收集的一些值插入数据库时,我在下面的python代码中遇到了一个SQL错误。我在用粗体突出显示的代码上发现了一个SQL错误。感谢您的帮助!

def add_ingredients(cursor) :
    while True:
      ingredient = raw_input("Name of ingredient (q to quit):")
      if ingredient.lower() !='q':
          num = raw_input("Number in storage: ")
          description = raw_input("description: ")
          sql = '''insert into ingredients 
             (title, amount, description)
            values
             **(:title, :amount, :description)'''**
          cursor.execute(sql,
           {"title":ingredient, "amount":num, "description":description})
          print "Added!"
      else:
          print "Okay, quitting."
          break