oh my bad. That's interesting, but im not sure about utility.

Because everyone literally uses package management to install and maintain bottle.

Bottle has code like this - https://github.com/bottlepy/bottle/blob/master/bottle.py#L81... - which does check for external dependencies (which predicate a package manager)

not really.. it uses ujson if it is installed and falls back to the built in json. Hard to call something a dependency when you don't depend on it.

Those are often called optional dependencies. Which is of course an oxymoron.