Flask文件目录----- db文件

import sqlite3

import click

from flask import current_app, g

from flask.cli import with_appcontext

def get_db():

if 'db' not in g:

g.db = sqlite3.connect(

current_app.config['DATABASE'],

detect_types = sqlite3.PARSE_DECLTYPES

)

g.db.row_factory = sqlite3.Row

return g.db

def close_db(e=None):

db = g.pop('db', None)

if db is not None:
    db.close()

def init_db():

db = get_db()

with current_app.open_resource('schema.sql') as f:
    db.executescript(f.read().decode('utf8'))

@click.command('init-db')

@with_appcontext

def init_db_command():

"""Clear the existing data and create new tables."""

init_db()

click.echo('Initialized the database.')

def init_app(app):

app.teardown_appcontext(close_db)

app.cli.add_command(init_db_command)