pkg_resources ドキュメントメモ
#pkg_resources
Legacy Namespace Package にも出てくる
https://setuptools.pypa.io/en/latest/userguide/package_discovery.html#legacy-namespace-packages
Historically, there were two methods to create namespace packages.
One is the pkg_resources style supported by setuptools and the other one being pkgutils style offered by pkgutils module in Python.
Basic Resource Access メモ
pkg_resource.resource_filename
resource_stringを使う例：package dataの参照方法