Pandas和Django的示例Demo

以下是一个结合Pandas和Django的示例Demo，展示如何在Django项目中读取、处理和展示Pandas数据。

Pandas和Django的示例Demo

前置条件：

安装python

基础设置

确保已安装Django和Pandas：

pip install django pandas

Installing collected packages: sqlparse, asgiref, django
Successfully installed asgiref-3.8.1 django-5.2.2 sqlparse-0.5.3

创建一个Django项目和应用：

django-admin startproject pandas_django_demo
cd pandas_django_demo
python manage.py startapp data_app

建立后django会生成下面目录

模型与数据处理

在data_app/models.py中定义一个简单模型：

from django.db import models

class DataRecord(models.Model):
    name = models.CharField(max_length=100)
    value = models.FloatField()
    timestamp = models.DateTimeField(auto_now_add=True)

在data_app/views.py中使用Pandas处理数据：

import pandas as pd
from django.shortcuts import render
from .models import DataRecord

def data_view(request):
    # 从数据库获取数据并转为DataFrame
    queryset = DataRecord.objects.all().values()
    df = pd.DataFrame.from_records(queryset)

    # 示例操作：计算统计值
    stats = {
        'mean': df['value'].mean(),
        'max': df['value'].max(),
        'min': df['value'].min()
    }

    # 将DataFrame转为HTML表格
    html_table = df.to_html(classes='table table-striped', index=False)

    return render(request, 'data_display.html', {
        'stats': stats,
        'html_table': html_table
    })

模板展示

创建templates/data_app/data_display.html：

<!DOCTYPE html>
<html>
<head>
    <title>Pandas + Django Demo</title>
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
    <div class="container mt-4">
        <h3>数据统计</h3>
        <ul>
            <li>平均值: {{ stats.mean }}</li>
            <li>最大值: {{ stats.max }}</li>
            <li>最小值: {{ stats.min }}</li>
        </ul>

        <h3 class="mt-4">原始数据</h3>
        {{ html_table|safe }}
    </div>
</body>
</html>

URL配置

在项目urls.py中添加路由：

from django.contrib import admin
from django.urls import path
from data_app import views

urlpatterns = [
    path('admin/', admin.site.urls),
    path('', views.data_view, name='data_view'),
]

或者用手工得方式添加测试记录

运行步骤

1. 迁移数据库：

   python manage.py makemigrations
   python manage.py migrate

创建admin用户

python mange.py createsuperuser

输入admin，输入admin@qq.com,输入密码admin123

后台登录输入admin/admin123

1. 启动开发服务器：

   python manage.py runserver

2. 访问http://127.0.0.1:8000查看结果。

数据导入示例

在Django shell中生成测试数据：

import random
from data_app.models import DataRecord
from django.utils import timezone

for i in range(10):
    DataRecord.objects.create(
        name=f"Item_{i}",
        value=random.uniform(10, 100),
        timestamp=timezone.now()
    )

或者手工输入dataRecord得记录

运行结果

python manage.py runserver

June 05, 2025 - 20:05:00
Django version 5.2.2, using settings 'pandas_django_demo.settings'
Starting development server at http://127.0.0.1:8000/
Quit the server with CTRL-BREAK.

WARNING: This is a development server. Do not use it in a production setting. Use a production WSGI or ASGI server instead.
For more information on production servers see: https://docs.djangoproject.com/en/5.2/howto/deployment/
[05/Jun/2025 20:05:07] "GET /data_app/ HTTP/1.1" 200 460
[05/Jun/2025 20:05:08] "GET /data_app/ HTTP/1.1" 200 460
[05/Jun/2025 20:05:09] "GET /data_app/ HTTP/1.1" 200 460
[05/Jun/2025 20:05:09] "GET /data_app/ HTTP/1.1" 200 460
[05/Jun/2025 20:05:09] "GET /data_app/ HTTP/1.1" 200 460
[05/Jun/2025 20:05:09] "GET /data_app/ HTTP/1.1" 200 460
[05/Jun/2025 20:05:10] "GET /data_app/ HTTP/1.1" 200 460
[05/Jun/2025 20:05:10] "GET /data_app/ HTTP/1.1" 200 460
[05/Jun/2025 20:05:10] "GET /data_app/ HTTP/1.1" 200 460
[05/Jun/2025 20:05:10] "GET /data_app/ HTTP/1.1" 200 460
[05/Jun/2025 20:05:10] "GET /data_app/ HTTP/1.1" 200 460
[05/Jun/2025 20:05:16] "GET / HTTP/1.1" 200 3493

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