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学生信息管理系统

本系统使用python，pyqt5，数据库使用MySQL，实现windowsGUI应用。

python使用pymysql模块操作数据库代码

import pymysqldef handle_db(cmd, sql):result = None# print(f" sql {sql}")# 连接数据库conn = pymysql.connect(host='localhost',user='xxx',password='xxxxx',database='student_manager_system',port=3306,charset='utf8mb4')# 创建游标cursor = conn.cursor()# 执行 SQL 语句cursor.execute(sql)# 获取查询结果if cmd == "select":result = cursor.fetchall()print(f"result db {result} {type(result)}")elif cmd == "insert":rowcount = cursor.rowcountif rowcount > 0:# print("插入成功！")result = Trueelse:# print("插入失败！")result = False# 提交事务conn.commit()elif cmd == "delete":rowcount = cursor.rowcountif rowcount > 0:result = Trueelse:result = False# 提交事务conn.commit()elif cmd == "update":rowcount = cursor.rowcountif rowcount > 0:result = Trueelse:result = False# 提交事务conn.commit()# 关闭游标和连接cursor.close()conn.close()return resultdef insert_data(arg):lineEdit, lineEdit2, lineEdit3, lineEdit4, lineEdit5, lineEdit6, lineEdit7 = arg# 检查学号是否重复check_sql = f"select * from student_manager where s_number={lineEdit2}"print(f"check sql is : {check_sql}")result = handle_db("select", check_sql)if result:return False, "学号重复"sql = f"insert into student_manager values ('{lineEdit}', '{lineEdit2}', '{lineEdit3}', " \f"'{lineEdit4}', '{lineEdit5}', '{lineEdit6}', '{lineEdit7}')"print(f"insert sql is : {sql}")result = handle_db("insert", sql)print(f"result {result}")if result:return True, ""else:return False, "学生信息插入到数据库失败，请检查数据库"def select_data():sql = "select * from student_manager"print(f"select data sql is : {sql}")result = handle_db("select", sql)# print(f"result {result}")return resultdef delete_data(num):sql = f"delete from student_manager where s_number='{num}'"print(f"delete data sql is : {sql}")result = handle_db("delete", sql)# print(f"result {result}")return resultdef update_data(arg):lineEdit, lineEdit2, lineEdit3, lineEdit4, lineEdit5, lineEdit6, lineEdit7 = arg# 检查学号是否重复check_sql = f"select * from student_manager where s_number={lineEdit2}"print(f"check update sql is : {check_sql}")result = handle_db("select", check_sql)if not result:return False, "该学生学号不存在"sql = f"update student_manager set name='{lineEdit}', sex='{lineEdit3}', age='{lineEdit4}'," \f"grade='{lineEdit5}', class='{lineEdit6}', remark='{lineEdit7}' where s_number='{lineEdit2}'"print(f"update data sql is : {sql}")result = handle_db("update", sql)# print(f"result {result}")if result:return True, ""else:return False, "学生信息修改到数据库失败，请检查数据库"

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