[Python] Flask per-application template folder

I implementing simple site with couple of applications (like blog, code, account, etc). I decided to split one python file to apps due to large size. I do not using blueprints or something else except basic functionality of Flask - I'd like to keep it as simple as it possible. Unfortunately, flask still looking for templates in the

/site
|-> main.py
from flask import Flask

app = Flask(__name__)
app.config.from_pyfile('config.py')

# Import all views
from errors.views import * # Errors hasn't its specific prefix
from blog.views import *
from account.views import *
from mysite.views import *

if __name__ == "__main__":
app.run(debug=True)
|-> templates
...................
|->blog
|-> template
|-> _layout.html
|-> index.html
|-> post.html
|-> __init__.py
from main import app
import blog.views
|-> views
from blog import app
from flask import render_template

@app.route("/blog/", defaults={'post_id': None})
@app.route("/blog/<intost_id>")
def blog_view(post_id):
if post_id:
return "Someday beautiful post will be here with id=%s" % post_id
else:
return "Someday beautiful blog will be here"

@app.route("/blog/tags/")
def tags_view():
pass
..........................

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