A reference to a Python object by name using a string, in the form
path.to.modulename:attributename.
hapis
A collection of python packages.
includeme
importmyappconfig.include(myapp)
For this to work properly, the myapp module must contain a callable
with the special name includeme, which should perform package
configuration.
plugin
Package that could be integrated by the framework in a sensible,
structured way into an arbitrarily-written application or project
created by a third-party developer.