python 如何将两个嵌套列表转换为数据库数据

x33g5p2x  于 2023-03-28  发布在  Python
关注(0)|答案(1)|浏览(114)

如何从两个python嵌套列表或列表元组转换数据(即:usernamesscores)插入名为'testdatabase_1_1'的数据库的两个表(usersgame)中,因此一个表(users)的第一列(id)将是primary key,另一个表(game)的第一列(userID)将是foreign key
我想用cursor.executemany方法而不是cursor.lastrowid方法执行代码。

import mysql.connector

db= mysql.connector.connect(host= 'localhost', user='root',password='',database='testdatabase_1_1')
mycursor=db.cursor()
Table1='CREATE TABLE users (id int AUTO_INCREMENT PRIMARY KEY , name VARCHAR(50), passwd VARCHAR (50))'
Table2='CREATE TABLE game (userID int PRIMARY KEY , foreign key (userID) REFERENCES users(id), game1 int default 0 , game2 int default 0)'

# mycursor.execute(Table1)
# mycursor.execute(Table2)

usernames=[('tim','techwithwim'),
           ('joei','joy123'),
           ('sara','sara1234')
           ]

scores=[(45,100),
        (30,200),
        (46,124)
        ]

mycursor.executemany('INSERT INTO users (name, passwd) values (%s,%s)' ,usernames)
mycursor.executemany('INSERT INTO game (userID, game1, game2) VALUES (%s, %s, %s)', scores)
db.commit()

当我想在executemany方法中执行这些请求时,我得到了这个错误:
raise InterfaceError(f“执行操作失败;{err}”)from None mysql.connector.errors.InterfaceError:执行操作失败;SQL语句的参数不足
当我修改这部分代码时:

mycursor.executemany('INSERT INTO game (userID, game1, game2) VALUES (%s, %s, %s)', scores)

mycursor.executemany('INSERT INTO game (userID, game1, game2) VALUES (%s, %s, %s)', *scores)

它提出:
executemmany()接受3个位置参数,但给出了5个

注意,我知道使用for loop方法和lastrowid方法是可能的,没有任何错误,就像这样:

import mysql.connector

db= mysql.connector.connect(host= 'localhost', user='root',password='',database='testdatabase_1_1')
mycursor=db.cursor()
Table1='CREATE TABLE users (id int AUTO_INCREMENT PRIMARY KEY , name VARCHAR(50), passwd VARCHAR (50))'
Table2='CREATE TABLE game (userID int PRIMARY KEY , foreign key (userID) REFERENCES users(id), game1 int default 0 , game2 int default 0)'

# mycursor.execute(Table1)
# mycursor.execute(Table2)

usernames=[('tim','techwithwim'),
           ('joei','joy123'),
           ('sara','sara1234')
           ]

scores=[(45,100),
        (30,200),
        (46,124)
        ]

Q3= 'insert into users (name, passwd)  values (%s,%s)'
Q4='insert into game(userID,game1,game2) values (%s,%s,%s)'

for x, user in enumerate(usernames):
    mycursor.execute(Q3,user)
    last_id= mycursor.lastrowid
    mycursor.execute(Q4 ,(last_id,) + scores[x] )
db.commit()
zkure5ic

zkure5ic1#


https://chat.openai.com/chat
给了我这个答案

import mysql.connector

db = mysql.connector.connect(host='localhost', user='root', password='', 
database='testdatabase_1_1')
mycursor = db.cursor()

Table1 = 'CREATE TABLE users (id int AUTO_INCREMENT PRIMARY KEY, name 
VARCHAR(50), passwd VARCHAR (50))'
Table2 = 'CREATE TABLE game (userID int PRIMARY KEY, foreign key (userID) 
REFERENCES users(id), game1 int default 0, game2 int default 0)'

# mycursor.execute(Table1)
# mycursor.execute(Table2)

 usernames = [('tim', 'techwithwim'),             ('joei', 'joy123'),             
 ('sara', 'sara1234')]

scores = [(1, 45, 100),          (2, 30, 200),          (3, 46, 124)]

mycursor.executemany('INSERT INTO users (name, passwd) values (%s,%s)', 
usernames)
mycursor.executemany('INSERT INTO game (userID, game1, game2) VALUES (%s, %s, 
%s)', scores)
db.commit()

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