python开发学习-day15(前端部分知识、web框架、Django创建项目)

s12-20160430-day15

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-->

pytho自动化开发 day15

Date:2016.04.30

    @南非波波

课程大纲：

http://www.cnblogs.com/wupeiqi/articles/4491246.html http://www.cnblogs.com/wupeiqi/articles/4508271.html

一、前端设计

1.实现图片轮播

js下载地址：
    http://bxslider.com/
引入
    <!-- jQuery library (served from Google) -->
    <script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script>
    <!-- bxSlider Javascript file -->
    <script src="/js/jquery.bxslider.min.js"></script>
    <!-- bxSlider CSS file -->
    <link href="/lib/jquery.bxslider.css" rel="stylesheet" />
加载图片：
    <ul class="bxslider">
      <li><img src="/images/pic1.jpg" /></li>
      <li><img src="/images/pic2.jpg" /></li>
      <li><img src="/images/pic3.jpg" /></li>
      <li><img src="/images/pic4.jpg" /></li>
    </ul>

调用：
    $(document).ready(function(){
      $('.bxslider').bxSlider();
    });

2.图标资源

Font Awesome
    http://fontawesome.io/
    a、图片，自己找图片，挖洞
    b、现成的图标
        css
        使用样式
        --以前版本
            css
            图片库
            使用样式
        -- 现在
            css
            字体文件
            使用样式
    c、css
        字体文件
        样式
    =====》 大图片

3.伪类

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>响应式</title>
    <style>
        @media (min-width: 768px) {
            .lead {
                background-color: red;
            }
        }
        .c1 {
            background-color: green;
            }
        .clearfix:after {
            content: ".";
            clear: both;
            visibility: hidden;
        }
    </style>
</head>
<body>

    <dev class="lead">
        我们都是中国人
    </dev>

    <div class="c1 clearfix">
        <div style="float: right;">
            你好
        </div>
         <div style="float: right;">
             china
        </div>
         <!--<div style="clear: both"></div>-->
    </div>

</body>
</html>

二、web框架

1.python web框架分类

#!/usr/bin/env python
#coding:utf-8

import socket

def handle_request(client):
    buf = client.recv(1024)
    client.send("HTTP/1.1 200 OK\r\n\r\n")
    client.send("Hello, Seven")

def main():
    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    sock.bind(('localhost',8000))
    sock.listen(5)

    while True:
        connection, address = sock.accept()
        handle_request(connection)
        connection.close()

if __name__ == '__main__':
    main()

2.MVC web框架

MVC：Models  Views Controllers

        数据库操作 模板  处理请求的函数
代码块的归类结构

MTV：Models Templates Views

    数据库操作 模板  处理请求的函数

3.Django基础

Django框架属于MTV框架。程序需要的操作的：
    1.models
    2.Templates
    3.Views
    4.urls

三、Django

1.安装

pip install django 1.9.5

2.创建Django程序框架

使用命令创建
    django-admin startproject demo 创建projects
    cd demo
    python manage.py startapp app0 创建应用
使用pycharm进行创建项目和应用

3.执行程序

进入项目， python manage.py runserver 127.0.0.1：8000

4.创建数据表

python manage.py makemigrations #生成配置文件
python manage.py migrate       #根据配置文件创建数据库相关 表

5.django默认后台管理

创建超级用户名 python manage.py createsuperuser

6.路由系统

静态路由
动态路由
    安照顺序，第n个匹配的数据交给函数的第n个参数，严格按照顺序
        url(r'^page/（\d+)/(\d+)',views.page)
    模板的方法，将匹配的参数，传给指定的形式参数
        url(r'^page/(?P<n1>\d+)/(?P<n2>\d+)',views.page)
二级路由
    app01
        urls.py
    project name
        URL：app01 ->include（"app01.urls"）

7.基本数据库操作

ORM框架
    code first
        自己写类 -->数据库表
    db first
        自己写命令操作数据库-->更新类
    使用类进行数据操作

创建类
    from django.db import models
    class UserInfo(models.Model):
        username = models.CharField(max_length=32)
        password = models.CharField(max_length=32)
        age = models.IntegerField()

配置
    setting
        INSTALLED_APPS = [
            'django.contrib.admin',
            'django.contrib.auth',
            'django.contrib.contenttypes',
            'django.contrib.sessions',
            'django.contrib.messages',
            'django.contrib.staticfiles',
            'app01',
        ]
使用命令根据类创建表
    python manage.py makemigrations #生成配置文件
    python manage.py migrate       #根据配置文件创建数据库相关 表
默认表名：
    appname_classname

d.
    views中导入models

e.
    POST提交数据
        settings里操作：
            MIDDLEWARE_CLASSES = [
                'django.middleware.security.SecurityMiddleware',
                'django.contrib.sessions.middleware.SessionMiddleware',
                'django.middleware.common.CommonMiddleware',
               # 'django.middleware.csrf.CsrfViewMiddleware',
                'django.contrib.auth.middleware.AuthenticationMiddleware',
                'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
                'django.contrib.messages.middleware.MessageMiddleware',
                'django.middleware.clickjacking.XFrameOptionsMiddleware',
            ]