飲冰三年-人工智慧-Python-22 Python初始Django
阿新 • • 發佈：2018-12-08
1：一個簡單的web框架
# 導包 from wsgiref.simple_server import make_server #自定義個處理函式 def application(environ,start_response): start_response("200 OK",[('Content-Type','text/html')]) return [b'<h1>Hello,web!</h1>'] httpd = make_server('',8091,application) print('Serving HTTP on port 8091....HelloWorld') httpd.serve_forever()
# 導包 from wsgiref.simple_server import make_server #自定義個處理函式 def application(environ,start_response): # 獲取路徑 path = environ["PATH_INFO"] start_response("200 OK",[('Content-Type','text/html')]) if path=="/yang": return [b'<h1>Hello,yang!</h1>View Code2.0'] elif path=="/Aaron": return [b'<h1>Hello,aaron!</h1>'] else: return [b'<h1>404!</h1>'] httpd = make_server('',8091,application) print('Serving HTTP on port 8091....') httpd.serve_forever()
# 導包 from wsgiref.simple_server import呼叫HTML內容make_server def yang(): f=open("yang.html","rb") data=f.read() return data def aaron(): f=open("aaron.html","rb") data=f.read() return data #自定義個處理函式 def application(environ,start_response): # 獲取路徑 path = environ["PATH_INFO"] start_response("200 OK",[('Content-Type','text/html')]) if path=="/yang": return [yang()] elif path=="/Aaron": return [aaron()] else: return [b'<h1>404!</h1>'] httpd = make_server('',8091,application) print('Serving HTTP on port 8091....') httpd.serve_forever()
# 導包 import time from wsgiref.simple_server import make_server def region(req): pass; def login(req): print(req["QUERY_STRING"]) f=open("login.html",'rb') data=f.read(); return data; def yang(req): f=open("yang.html","rb") data=f.read() return data def aaron(req): f=open("aaron.html","rb") data=f.read() return data def show_time(req): times=time.ctime() # 方法一：通過模板使用 # con=("<h1>time:%s</h1>" %str(times)).encode("utf8") # return con # 方法二：字串替換 f = open("show_time.html", "rb") data = f.read() data=data.decode("utf8") data =data.replace("{{time}}",str(times)) return data.encode("utf8") # 定義路由 def router(): url_patterns=[ ("/login",login), ("/region", region), ("/yang", yang), ("/aaron", aaron), ("/show_time",show_time), ] return url_patterns #自定義個處理函式 def application(environ,start_response): # 獲取路徑 path = environ["PATH_INFO"] start_response("200 OK",[('Content-Type','text/html')]) url_patterns = router() func =None for item in url_patterns: if item[0]==path: func=item[1] break if func: return [func(environ)] else: return [b'404'] httpd = make_server('',8091,application) print('Serving HTTP on port 8091....') httpd.serve_forever()模擬路由
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <style> *{ margin: 0; padding: 0; } </style> </head> <body> <h1>時間：{{time}}}</h1> </body> </html>show_time.html
2：一個簡單的django案例
Django的下載與安裝
如何檢驗是否安裝成功？
2.1 建立django專案的兩種方法
--建立Django專案 django-admin startproject mysite --建立應用 python manage.py startapp blog通過命令建立
方式2：通過Pycharm建立
建立成功
大致分為三步
a：修改urls.py 類似控制器，把想要展示的內容通過地址配置一下
b:在views中設定具體的邏輯
c：在templates中設定要顯示的頁面內容
通過命令列啟動django。
python manage.py runserver 8091
如何引用js
a：新增static檔案，並把js放置到該檔案下
b：在setting檔案中配置
c：在對應的檔案中做引用
URL配置(URLconf)：又叫做路由系統，其本質是提供路徑和檢視函式之間的呼叫對映表。
格式：
urlpatterns=[
url(正在表示式，views檢視函式，引數，別名)
]
例1：匹配 XXX/articles/年份（只能匹配4位數字）
from django.contrib import admin from django.urls import path from django.conf.urls import url from blog import views urlpatterns = [ path('admin/', admin.site.urls), path('show_time/',views.show_time), url(r'^articles/[0-9]{4}/$', views.year_archive), ]urls.py--1.0
from django.shortcuts import render,HttpResponse import time def show_time(request): # return HttpResponse("Hello") return render(request,"index.html",{"time":time.ctime()}) # Create your views here. def year_archive(request): return HttpResponse("2018");Views.py
例2：如何獲取到位址列中的年份（通過路由新增()匹配）
例3：給分組命名
urls中的配置
url(r'^articles/(?P<year>[0-9]{4})/(?P<month>[0-9]{2})$', views.year_archive),
views檢視中的程式碼
return HttpResponse(year+"-"+month)
例四：註冊小練習
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <form action="" method="post"> <p>姓名 <input type="text" name="name"></p> <p>年齡 <input type="text" name="age"></p> <p>愛好 <input type="checkbox" name="hobby" value="1">讀書 <input type="checkbox" name="hobby" value="2">寫字 <input type="checkbox" name="hobby" value="3">看報 </p> <p><input type="submit"></p> </form> </body> </html>Register.html
from django.shortcuts import render,HttpResponse import time def show_time(request): # return HttpResponse("Hello") return render(request,"index.html",{"time":time.ctime()}) # Create your views here. def year_archive(request,month,year): return HttpResponse(year+"-"+month) def Register(request): if request.method=="POST": con="Hello,%s，你的年齡是%s"%(request.POST.get("name"),request.POST.get("age")) return HttpResponse(con) return render(request,"Register.html")Views.py
"""django01 URL Configuration The `urlpatterns` list routes URLs to views. For more information please see: https://docs.djangoproject.com/en/2.1/topics/http/urls/ Examples: Function views 1. Add an import: from my_app import views 2. Add a URL to urlpatterns: path('', views.home, name='home') Class-based views 1. Add an import: from other_app.views import Home 2. Add a URL to urlpatterns: path('', Home.as_view(), name='home') Including another URLconf 1. Import the include() function: from django.urls import include, path 2. Add a URL to urlpatterns: path('blog/', include('blog.urls')) """ from django.contrib import admin from django.urls import path from django.conf.urls import url from blog import views urlpatterns = [ path('admin/', admin.site.urls), path('show_time/',views.show_time), url(r'^articles/(?P<year>[0-9]{4})/(?P<month>[0-9]{2})$', views.year_archive), url(r'^Register/', views.Register), ]urls.py
注意：需要把這句程式碼給註釋掉
效果圖
在url中給地址設定一個別名，這樣後期Register名稱的修改將不影響系統中其他呼叫的功能
URL分發
效果：
