flask学习笔记一

简单的flask实例

hello world

from flask import Flask

app=Flask(__name__)

@app.route('/')
def hello_world():
    return "flask is running"

if __name__ == "__main__":
    app.run()

* Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)

关于路由与变量

from flask import Flask

app=Flask(__name__)

@app.route('/')
def hello_world():
    return "flask is running"

@app.route('/user/<username>/')  #这里的username是一个路由上的变量
def show_user_name(username):
    return "User:%s" % username

if __name__ == '__main__':
    app.run(debug=True)

get post方法判断

from flask import Flask
from flask import request

app=Flask(__name__)

@app.route('/')
def hello_world():
    return "flask is running"

@app.route('/project/',methods=['GET','POST'])
def method():
    if request.method == 'POST':
        return 'method : post'
    else:
        return 'method : get'

if __name__ == '__main__':
    app.run(debug=True)

模版的使用

@app.route('/hello/<name>/')
def hello_world(name=None):
    return render_template('first.html',name=name)

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>flask</title>
</head>
<body>
{% if name %}
    <h1>Hello {{name}}!</h1>
{% else %}
    <h1>on name</h1>
{% endif %}
</body>
</html>

路由重定向

@app.route('/hello/<name>/')
def hello_world(name=None):
    return render_template('first.html',name=name)

@app.route('/a')
def refirect():
    return redirect('/hello/admin')

post／get方法获取返回值

@app.route('/project/',methods=['GET','POST'])
def project():
    if request.method=='POST':
        name=request.form.get('name','aa')
        age=request.form.get('age','bb')
        return name+'is'+age
    else:
        shots=request.args.get('string','test_string')
        return str(shots)

import requests

a=requests.get('http://127.0.0.1:5000/project/')
print(a.text)

data={'name':'admin','age':'24'}
b=requests.post('http://127.0.0.1:5000/project/',data=data)
print(b.text)

test_string
adminis24

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