I am looking for something like uWSGI + django autoreload mode for Flask.
I am afraid that Flask is really too bare bones to have an implementation like this bundled by default.
Dynamically reloading code in production is generally a bad thing, but if you are concerned about a dev environment, take a look at this bash shell script http://aplawrence.com/Unixart/watchdir.html
Just change the sleep interval to whatever suits your needs and substitute the echo command with whatever you use to reload uwsgi. I run uwsgi un master mode and just send a killall uwsgi command.