Python Flask Web + PyQt 前后端分离的项目—学习成绩可视化分析系统

简介

使用工具：

Python，PyQt ，Flask ，MySQL

注：制作重点在网页端，因此网页端的功能更全

WEB界面展示:

系统登录分为管理员，老师，学生3部分

管理员统一管理所有的账号信息以及登录信息

老师管理，添加，修改班级，学生的成绩信息

学生只能查看成绩信息，不能做出修改

PYQT界面展示：

数据库创建：

项目目录

Project-

- PYQT # 存放软件端的代码文件（运行login.py启动程序）

- static # 存放静态资源（图片等）

- templates # 存放网页端的代码

- app.py # 启动网页端系统

- student.sql # 数据库文件

代码

简单放一个登录的代码

from flask import Flask, jsonify, render_template, request, redirect, url_for, session
import mysql.connector
import matplotlib.pyplot as plt
import pandas as pd
import matplotlib
matplotlib.use('agg')
from matplotlib.font_manager import FontProperties
from io import BytesIO
import base64
from flask import render_template_string
import os
from datetime import datetime
from collections import defaultdict# 预设字体格式，并传给rc方法
font = {'family': 'SimHei', "size": 12}
matplotlib.rc('font', **font)  # 一次定义终身使用
# Set font properties for Chinese characters
font_prop = FontProperties(fname=r'C:\Windows\Fonts\simhei.ttf', size=12)app = Flask(__name__)
app.secret_key = 'your_secret_key'  # Change this to a secure secret key# Replace these placeholders with your database connection details
DB_HOST = 'localhost'
DB_USER = 'root'
DB_PASSWORD = '123456'
DB_DATABASE = 'Student'def connect_to_database():try:connection = mysql.connector.connect(host=DB_HOST,user=DB_USER,password=DB_PASSWORD,database=DB_DATABASE)return connectionexcept mysql.connector.Error as err:print(f"Error: {err}")return Nonedef save_login_record(connection, role, account):try:cursor = connection.cursor()login_time = datetime.now().strftime('%Y-%m-%d %H:%M:%S')query = f"INSERT INTO login_record (role, account, login_time) VALUES ('{role}', '{account}', '{login_time}')"cursor.execute(query)connection.commit()except mysql.connector.Error as err:print(f"Error: {err}")finally:cursor.close()def check_admin_login(connection, table_name, account, password, role):try:if role == '管理员':table_name = 'admin'cursor = connection.cursor()print(table_name,account,password,role)query = f"SELECT * FROM {table_name} WHERE Mainid='{account}' AND password='{password}'"# Implement your database query logic herecursor.execute(query)result = cursor.fetchone()elif role == '老师':table_name = 'admin_teachers'# Check administrator logincursor = connection.cursor()print(table_name,account,password,role)query = f"SELECT * FROM {table_name} WHERE Teacherid='{account}' AND password='{password}'"# Implement your database query logic herecursor.execute(query)result = cursor.fetchone()elif role == '学生':table_name = 'admin_students'# Check administrator logincursor = connection.cursor()print(table_name,account,password,role)query = f"SELECT * FROM {table_name} WHERE Studentid='{account}' AND password='{password}'"# Implement your database query logic herecursor.execute(query)result = cursor.fetchone()if result:# Save login record in data_8save_login_record(connection, role, account)return bool(result)except mysql.connector.Error as err:print(f"Error: {err}")return Falsefinally:cursor.close()@app.route('/')
def index():return render_template('login.html')@app.route('/login', methods=['POST'])
def login():account = request.form['account']password = request.form['password']role = request.form['role']connection = connect_to_database()if connection is None:return render_template('login_failed.html', message='Failed to connect to the database.')table_name = get_table_name(role)if check_admin_login(connection, table_name, account, password, role):session['role'] = roleif role == '学生':session['account'] = accountprint("===================",session['account'])return redirect(url_for('admin_dashboard'))else:return render_template('login_failed.html', message='Invalid username or password.')@app.route('/admin/dashboard')
def admin_dashboard():role = session.get('role')if role == '管理员':data = fetch_admin_data()data_1 = fetch_admin_teacher_data()data_2 = fetch_admin_student_data()data_8 = fetch_login_records()data_10 = populate_tree_model_10()return render_template('admin_dashboard.html', role=role, data=data, data_1=data_1, data_2=data_2, data_8 = data_8, data_10 = data_10)elif role == '老师':data_2 = fetch_admin_student_data()data_3 = populate_tree_model_2()data_4 = populate_tree_model_6()data_5 = populate_tree_model_4()data_6 = populate_tree_model_7()data_7 = populate_tree_model_5()data_9 = populate_tree_model_9()scatter_plot_files = show_images()data_10 = populate_tree_model_10()return render_template('teacher_dashboard.html',scatter_plot_files = scatter_plot_files, role=role, data_2=data_2, data_3=data_3, data_4=data_4, data_5=data_5, data_6=data_6, data_7=data_7, data_9=data_9, data_10 = data_10)elif role == '学生':account = session.get('account')data_3 = populate_tree_model_2()data_4 = populate_tree_model_6()data_5 = populate_tree_model_4()data_6 = populate_tree_model_7()data_7 = populate_tree_model_5()data_8 = show_info()print("===================----------------",session['account'])return render_template('student_dashboard.html', studentID=account, data_3=data_3, data_4=data_4, data_5=data_5, data_6=data_6, data_7=data_7, data_8=data_8)else:return redirect(url_for('index'))# Add routes for other pages as neededdef get_table_name(role):# Implement logic to determine the table name based on the roleif role == '管理员':return 'admin'elif role == '老师':return 'admin_teachers'elif role == '学生':return 'admin_students'else:return Nonedef fetch_login_records():data_8 = []try:connection = connect_to_database()if connection is None:return []cursor = connection.cursor()query = "SELECT * FROM login_record"cursor.execute(query)login_records = cursor.fetchall()# Convert rows to a list of dictionariesfor row in login_records:data_8.append({'role': row[0],'account': row[1],'login_time': row[2]})return data_8except mysql.connector.Error as err:print(f"Error: {err}")return []finally:cursor.close()if connection:connection.close()def fetch_admin_data():data = []try:# Connect to the MySQL databaseconnection = mysql.connector.connect(host='localhost',user='root',password='123456',database='Student')cursor = connection.cursor()# Execute a query to fetch data from the admin tablequery = "SELECT Mainid, Username, Password, Name FROM admin"cursor.execute(query)# Fetch all rows from the resultrows = cursor.fetchall()# Convert rows to a list of dictionariesfor row in rows:data.append({'Mainid': row[0],'Username': row[1],'Password': row[2],'Name': row[3]})except mysql.connector.Error as err:print(f"Error: {err}")finally:# Close the cursor and connectioncursor.close()connection.close()return data