flask环境

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1、安装pip

wget https://bootstrap.pypa.io/get-pip.py

python get-pip.py

2、安装 virtualenv

pip install virtualenv

3、激活环境

$ mkdir myproject
$ cd myproject
$ virtualenv venv
New python executable in env/bin/python
Installing setuptools............done.

source venv/bin/activate

或

. venv/bin/activate

4、退出环境
deactivate

5、安装flask

pip install flask

6、hello.py

from flask import Flask
app = Flask(__name__)
@app.route('/')
def index():
return 'Index Page'
if __name__ == '__main__':
app.run(
host="0.0.0.0"
)

7、url参数

from flask import Flask
app = Flask(__name__)
@app.route('/')
def index():
return 'Index Page'
@app.route('/hello/<username>')
def hello(username):
return 'Hello %s' % username
@app.route('/t/<int:userid>')
def tt(userid):
return 'Hello %d' % userid
if __name__ == '__main__':
app.run(
host="0.0.0.0",
debug=True
)

url_for('static', filename='style.css')

8、渲染模板

from flask import Flask,url_for
from flask import render_template
app = Flask(__name__)

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

if __name__ == '__main__':
app.run(
host="0.0.0.0",
debug=True
)

9、处理404请求

@app.errorhandler(404)
def not_found(error):
return render_template('error.html'), 404

10、认证插件

https://pythonhosted.org/Flask-Security/

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