Flask 的扩张结构是在诞生的时候就确定了的。存在各种各样好用的扩张。
这里整理了一些常用的扩张：
1 Flask-script
给flask提供命令行选项，可以在shell里进行调试，测试工作。
pip install flask-scripts
from flask.ext.script import Manager
manager = Manager(app)
manager.run()

python test.py —help
python test.py shell
python test.py runserver -h 0.0.0.0 -p 5000

2 Flask-Bootstrap
pip install flask-bootstrap

from flask.ext.bootstrap import Bootstrap

bootstrap = Bootstrap(app)

user.html

3 Flask-Moment 时间日期本地格式化
pip install flask-moment

from flask.ext.moment import Moment
moment = Moment(app)

index.html

4 Flask-WTF Form表单
pip install falsk-wtf

Form Classes 继承自Form
from flask.ext.wtf import Form
from wtforms import StringField,SubmitField
from wtform.validators import Rrquired

class NameForm(Form):
name = StringField(‘What is your name?’,validators=[Required()])
submit = SubmitField(‘Submit’)

StringField
TextAreaField
PasswordField
HiddenField
DateField
DateTimeField
IntegerField
DecimalField
FloatField
BooleanField
RadioField
SelectField
SelectMultipleField
FielField
SubmitField
FormField
FieldList

5 数据库
pip install flask-sqlalchemy
MySQL mysql://username:password@hostname/database

2 Login
3 Form