pip基本操作
安装：pip install [包名]
删除：pip uninstall []
查找:pip search []
列表安装：pip install -r requirements.txt
导出列表：pip freeze > requirements.txt
安装pip install flask==0.10.1

这本书坑。忽略下面，没什么实际的技能学习

下面直接附代码
创建config.py文件

class Config(object):
    """docstring for Config"""
    def __init__(self, arg):
        super(Config, self).__init__()
        self.arg = arg
        
    pass

class ProdConfig(object):
    """docstring for ProdConfig"""
    def __init__(self, arg):
        super(ProdConfig, self).__init__()
        self.arg = arg

    pass

class DevConfig(object):
    """docstring for DevConfig"""
    def __init__(self, arg):
        super(DevConfig, self).__init__()
        self.arg = arg
        
    pass
        

创建main.py文件

from flask import Flask
from config import DevConfig

app  = Flask(__name__)
app.config.from_object(DevConfig)

@app.route('/')
def home():
    return 'hello'

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

运行main.py文件 浏览器访问127.0.0.1:500就会出现hello
安装：pip install flask-script
创建manage.py

from flask.ext.script import Manager,Server
from main import app

manager = Manager(app)

manager.add_command('server',Server())

@manager.shell
def make_shell_context():
    return dect(app=app)

if __name__=='__main__':
    manager.run()

**运行python manage.py runserver **
还可以实用命令进入shell：
python manage.py shell

第二章

这里新手会遇到坑，我做笔记的不讲解错误

安装pip install flask-sqlalcheny
前提安装了python的mysql库
修改config.py

class DevConfig(object):
    debug= True
    SQLALCHEMY_DATABASE_URI= 'mysql+pymysql://用户名:密码@ip地址:端口/数据库名'
    

修改main.py

#coding=utf-8
from flask import Flask
from config import DevConfig
from flask.ext.sqlalchemy import SQLAlchemy

app  = Flask(__name__)
app.config.from_object(DevConfig)
db = SQLAlchemy(app)

@app.route('/')
def home():
    return 'hello'

class User(db.Model):
    __tablename__ = 'user' #数据库中创建的表名
    id = db.Column(db.Integer(),primary_key=True)
    username = db.Column(db.String(255))
    password = db.Column(db.String(255))

    def __init__(self,username):
        self.username=username

    def __repr__(self):
        return "User '{}'".format(self.username)
#希望现实sql语句的在devconfig中加入SQLALCHEMY_ECHO=True

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

修改manage.py

from flask.ext.script import Manager,Server
from main import app,db,User

manager = Manager(app)

manager.add_command('server',Server())

@manager.shell
def make_shell_context():
    return dict(app=app,db=db,User=User)

if __name__=='__main__':
    manager.run()

运行,并添加一个用户：

python manage.py shell
db.create_all()
user = User(username='fake_name')
db.session.add(user)
db.session.commit()

修改main.py

#coding=utf-8
from flask import Flask
from config import DevConfig
from flask.ext.sqlalchemy import SQLAlchemy

app  = Flask(__name__)
app.config.from_object(DevConfig)
db = SQLAlchemy(app)

@app.route('/')
def home():
    return 'hello'

class User(db.Model):
    __tablename__ ='user' #数据库中创建的表名
    id = db.Column(db.Integer(),primary_key=True)
    username = db.Column(db.String(255))
    password = db.Column(db.String(255))

    def __init__(self,username):
        self.username=username

    def __repr__(self):
        return "User '{}'".format(self.username)
#希望现实sql语句的在devconfig中加入SQLALCHEMY_ECHO=True

#文章
class Post(db.Model):
    id = db.Column(db.Integer,primary_key=True)
    title = db.Column(db.String(255))
    text = db.Column(db.Text())
    publish_date = db.Column(db.DateTime())
    user_id = db.Column(db.Integer()) #不喜欢用外链 这样比较自由  

    def __init__(self,title):
        self.title= title

    def __repr__(self):
        return "<post '{}'>".format(self.title)
＃标签
class Tag(db.Model):
    id = db.Column(db.Integer(),primary_key=True)
    title = db.Column(db.String(255))

    def __init__(self,title):
        self.title=title
    def __repr__(self):
        return "<Tag :{}>".format(self.title)


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

添加数据：

python manger.py shell
user = User.query.get(1)
from main import Post
post = Post(title='title post',text ='',publish='2017-12-10')
post.user_id = user.id

db.session.add(post)
db.session.commit()