1、使用步骤：

创建蓝图

blue = Blueprint("myblue01", __name__)

使用蓝图装饰视图函数

@blue.route('/')
def index():return 'index'

将蓝图注册到app中

from appdemo_blueprint import blue
app.register_blueprint(blue)

2、以包的形式使用蓝图

 <1>user包之__init__.py：

from flask import BlueprintuserBlueprint = Blueprint('user', __name__)from user import views

<2>user包之views.py:

from user import userBlueprint@userBlueprint.route('/user')
def user_fun():return 'user'

<3>appdemo.py：

from flask import Flask
from user import userBlueprintapp = Flask(__name__)
app.register_blueprint(userBlueprint)if __name__ == "__main__":print(app.url_map)app.run(debug=True)