python - MySQLdb executemany 使用列表作为输入？

Question

我想在我的程序中使用 executemany 一次存储 20 条记录，这是文档中的内容...

c.executemany(
  """INSERT INTO breakfast (name, spam, eggs, sausage, price)
  VALUES (%s, %s, %s, %s, %s)""",
  [
  ("Spam and Sausage Lover's Plate", 5, 1, 8, 7.95 ),
  ("Not So Much Spam Plate", 3, 2, 0, 3.95 ),
  ("Don't Wany ANY SPAM! Plate", 0, 4, 3, 5.95 )
  ] )

但是，我在一个列表中有我的值，并且宁愿不使用列表中的索引来执行上述 18 个版本。

下面是我的代码...

db = connect_to_db()
cursor = db.cursor()
sql = "INSERT INTO gkey (keyword, date, time, position) VALUES (%s, %s, %s, %s)"
params = [(str(keywords[0]), date, time, position[0])]
cursor.executemany(sql, params)
db.commit()

这很好用，它会提交列表中的第一个关键字，以及日期、时间和位置，我不想像下面那样重复参数 19 次...

db = connect_to_db()
cursor = db.cursor()
sql = "INSERT INTO gkey (keyword, date, time, position) VALUES (%s, %s, %s, %s)"
params = [
(str(keywords[0]), date, time, position[0])
(str(keywords[0]), date, time, position[0])
(str(keywords[0]), date, time, position[0])
(str(keywords[0]), date, time, position[0])
(str(keywords[0]), date, time, position[0])
(str(keywords[0]), date, time, position[0])
(str(keywords[0]), date, time, position[0])
(str(keywords[0]), date, time, position[0])
(str(keywords[0]), date, time, position[0])
(str(keywords[0]), date, time, position[0])
(str(keywords[0]), date, time, position[0])
(str(keywords[0]), date, time, position[0])
(str(keywords[0]), date, time, position[0])
(str(keywords[0]), date, time, position[0])
(str(keywords[0]), date, time, position[0])
(str(keywords[0]), date, time, position[0])
(str(keywords[0]), date, time, position[0])    
(str(keywords[0]), date, time, position[0])
(str(keywords[0]), date, time, position[0])

]
cursor.executemany(sql, params)
db.commit()

以上是我试图避免的示例(我知道索引需要递增才能正常工作!;))

当我尝试将整个列表作为值传递时出现错误，我需要一次传递一个，有什么想法吗？可以执行很多吗，还是我应该循环并一次更新它们？但我很确定我试过了，但我遇到了类似的错误？不过我没有记下来。

Answer 1

params = [(str(keywords[i]), date, time, position[i]) for i in range(20)]