蓝图（blue print）
类似Django中的不同APP，实现分目录实现业务功能。
目录结构：
|flaskbp
|——flaskbp
|————static
|————templates
|————views
|——————bp1.py
|——————bp2.py
|——————__init__.py
|——————manage.py
manage.py
from flaskbp import create_app
app = create_app()
if __name__ == '__main__':
app.run()
__init__.py
from flask import Flask
from flaskbp.views.bp1 import b1
from flaskbp.views.bp2 import b2
def create_app():
app = Flask(__name__)
app.secret_key = "a1b2c3"
@app.route("/index")
def index():
return "index"
app.register_blueprint(b1)
app.register_blueprint(b2)
app.register_blueprint(b1,url_prefix='web') # 还可以定制前缀
app.register_blueprint(b2,url_prefix='api')
return app
Bp1.py
from flask import Blueprint
b1 = Blueprint("b1",__name__)
@b1.route("/a1")
def a1():
return "a1"
@b1.route("/a2")
def a2():
return "a2"
Bp2.py
from flask import Blueprint
b2 = Blueprint("b2",__name__)
@b2.route("/a3")
def a3():
return "a3"
@b2.route("/a4")
def a4():
return "a4"