参考教程链接：
1.https://dormousehole.readthedocs.io/en/latest/
2.https://www.w3cschool.cn/flask/
前提准备：anaconda（python3），pycharm
from flask import Flask
app = Flask(__name__)
@app.route(‘/‘)
def hello_world():
return‘Hello World’if__name__ == ‘__main__‘:
app.run()
解释：
1.@app.route(‘/‘)说明了下面的hello_world()函数与url‘/‘绑定(http://127.0.0.1:5000/)
运行该hello.py，点击pycharm下的链接http://127.0.0.1:5000/，即会显示字符串Hello World
2.@app.route(‘/hello’)则绑定http：//localhost：5000/hello
二、从url名字传递参数（
@app.route(‘/hello/<name>‘)
from flask import Flask
app = Flask(__name__)
@app.route(‘/hello/<name>‘)
def hello_name(name):
return‘Hello %s!‘ % name
if__name__ == ‘__main__‘:
app.run(debug = True)
输入链接：http:// localhost:5000/hello/Jack
将会显示： Hello Jack！
参考：https://www.w3cschool.cn/flask/flask_variable_rules.html
三、url重定向（return redirect(url_for(‘hello_admin‘))）
url_for（‘‘） #重定向到另外一个函数
from flask import Flask, redirect, url_for
app = Flask(__name__)
@app.route(‘/admin‘)
def hello_admin():
return‘Hello Admin‘
@app.route(‘/guest/<guest>‘)
def hello_guest(guest):
return‘Hello %s as Guest‘ % guest
@app.route(‘/user/<name>‘)
def hello_user(name):
if name ==‘admin‘:
return redirect(url_for(‘hello_admin‘))
else:
return redirect(url_for(‘hello_guest‘,guest = name))
if__name__ == ‘__main__‘:
app.run(debug = True)
打开浏览器并输入URL - http://localhost:5000/user/admin
浏览器中的应用程序响应是：
Hello Admin
在浏览器中输入以下URL - http://localhost:5000/user/mvl
应用程序响应现在更改为：
Hel
lo mvl as Guest
四、结合html和post和get
将以下脚本另存为login.html
<
html
>
<
body
>
<
form
action
= "http://localhost:5000/login"
method
= "post"
>
<
p
>Enter Name:</p><p><input type = "text" name = "nm"/></p><p><input type = "submit" value = "submit"/></p></form></body></html>
hello.py如下：
from flask import Flask, redirect, url_for, request
app = Flask(__name__)
@app.route(‘/success/<name>‘)
def success(name):
return‘welcome %s‘ % name
@app.route(‘/login‘,methods = [‘POST‘, ‘GET‘])
def login():
if request.method == ‘POST‘:
user = request.form[‘nm‘]
return redirect(url_for(‘success‘,name = user))
else:
user = request.args.get(‘nm‘)
return redirect(url_for(‘success‘,name = user))
if__name__ == ‘__main__‘:
app.run(debug = True)
注意到，form表单method是post，input框的name是‘nm‘
<p><input type = "text" name = "nm" /></p>
在本地打开文件login.html
summit以后，网页自动跳转到‘/ success‘ URL，显示：welcome mvl
原文：https://www.cnblogs.com/qiezi-online/p/12859820.html
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