一个用Python编写的管理系统代码
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2023-01-09
16:11:50
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import sqlite3
def create_user(username, password):
# 使用 sqlite3 模块连接数据库
conn = sqlite3.connect('system.db')
c = conn.cursor()
# 执行 INSERT 操作
c.execute('INSERT INTO users (username, password) VALUES (?, ?)', (username, password))
conn.commit()
conn.close()
def update_user(user_id, username, password):
conn = sqlite3.connect('system.db')
c = conn.cursor()
# 执行 UPDATE 操作
c.execute('UPDATE users SET username = ?, password = ? WHERE id = ?', (username,
password, user_id))
conn.commit()
conn.close()
def delete_user(user_id):
conn = sqlite3.connect('system.db')
c = conn.cursor()
# 执行 DELETE 操作
c.execute('DELETE FROM users WHERE id = ?', (user_id,))
conn.commit()
conn.close()
def get_user(user_id):
conn = sqlite3.connect('system.db')
c = conn.cursor()
# 执行 SELECT 操作
c.execute('SELECT * FROM users WHERE id = ?', (user_id,))
user = c.fetchone()
conn.close()
return user
def list_users():
conn = sqlite3.connect('system.db')
c = conn.cursor()
c.execute('SELECT * FROM users')
users = c.
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