python - 如何使用 SELECT COUNT sql 生成一个 int

Question

我在 python 中有这段代码查询现有的数据库:

count = db.execute("SELECT COUNT (player_id) FROM players WHERE user_id 
= :id", id = session["user_id"])

for player in range(count):
    db.execute("INSERT INTO live_players (player_id) VALUES (:filler)", 
filler = 0)

但是，它不会运行，因为“count”不是 int。我希望 SELECT COUNT 返回 2，但它返回 '[{'COUNT (player_id)': 2}]'。我该如何补救？

Answer 1

您正在取回结果字典。只需访问它。为了使这种访问更容易，给它一个别名:

SELECT COUNT(player_id) AS player_count ...

然后:

for player in range(count["player_count"]):
   ...