我使用PEP440中建议的本地版本标签，并且打包了两个版本：turicreate-6.2和turicreate-6.2+minimal。
我首先安装turicreate 6.2+minimal，
$ pip install target/turicreate-6.2+minimal-cp36-cp36m-macosx_10_12_intel.macosx_10_12_x86_64.macosx_10_13_intel.macosx_10_13_x86_64.macosx_10_14_intel.macosx_10_14_x86_64.whl
然后我尝试安装6.2，希望pip可以卸载6.2+minimal，但它说
pip install turicreate==6.2
Requirement already satisfied: turicreate==6.2 in ./env36/lib/python3.6/site-packages (6.2+minimal)
我很困惑。它将版本6.2和本地版本（重新分发版本）6.2+minimal视为相同。但是为什么呢？
如果我按照相反的顺序进行操作，请先安装6.2，然后再安装6.2+minimal，pip将首先卸载6.2。 pip似乎对这两个版本的处理方式有所不同。
$ pip install target/turicreate-6.2+minimal-cp36-cp36m-macosx_10_12_intel.macosx_10_12_x86_64.macosx_10_13_intel.macosx_10_13_x86_64.macosx_10_14_intel.macosx_10_14_x86_64.whl
Processing ./target/turicreate-6.2+minimal-cp36-cp36m-macosx_10_12_intel.macosx_10_12_x86_64.macosx_10_13_intel.macosx_10_13_x86_64.macosx_10_14_intel.macosx_10_14_x86_64.whl
...
Requirement already satisfied: chardet<4,>=3.0.2 in ./env36/lib/python3.6/site-packages (from requests>=2.9.1->turicreate==6.2+minimal) (3.0.4)
Installing collected packages: turicreate
Attempting uninstall: turicreate
Found existing installation: turicreate 6.2
Uninstalling turicreate-6.2:
Successfully uninstalled turicreate-6.2
Successfully installed turicreate-6.2+minimal