Since you can't change mp3 "Open with" "Default application" from Audacious to fx VLC under Properties in Ubuntu 16.04, and it is annoying to get your playlist deleted every time you open a single mp3-file, here is a work-around.
Go to File > Settings > Playlist and uncheck "Clear the playlist when opening files".
With Scrapy you can crawl web sites and get their content, mainly text and images. Since it isn't possible to install Scrapy with sudo apt-get install scrapy, the recommended way is to install it inside a virtual Python environment called Anaconda.
With these commands you can get Scrapy up and running on Ubuntu 16.04: