为什么“python setup.py sdist”会在项目根目录中创建不需要的“PROJECT-egg.info”？

When I run

当我跑

  python setup.py sdist

it creates an sdist in my ./dist directory. This includes a "PROJECT-egg.info" file in the zip inside my "dist" folder, which I don't use, but it doesn't hurt me, so I just ignore it.i