在Mac OS更新到Mojave 10.14.3（可能不相关）之后，所有的pipenv命令现在都可以使用了（几天前，它运行良好）。
seohuns-MBP-2:sparse_tutorial seohun$ pipenv --version
Traceback (most recent call last):
File "/usr/local/Cellar/pipenv/2018.11.26/libexec/bin/pipenv", line 6, in <module>
from pkg_resources import load_entry_point
ModuleNotFoundError: No module named 'pkg_resources'
seohuns-MBP-2:sparse_tutorial seohun$ pipenv --python 3.6
Traceback (most recent call last):
File "/usr/local/Cellar/pipenv/2018.11.26/libexec/bin/pipenv", line 6, in <module>
from pkg_resources import load_entry_point
ModuleNotFoundError: No module named 'pkg_resources'
seohuns-MBP-2:sparse_tutorial seohun$ python --version
Python 3.6.8 :: Anaconda custom (64-bit)
搜索此问题时，我发现setuptools中有pkg_resources软件包。因此，我更新了设置工具，
seohuns-MBP-2:sparse_tutorial seohun$ pip install --upgrade setuptools
Collecting setuptools
Downloading https://files.pythonhosted.org/packages/d1/6a/4b2fcefd2ea0868810e92d519dacac1ddc64a2e53ba9e3422c3b62b378a6/setuptools-40.8.0-py2.py3-none-any.whl (575kB)
100% |████████████████████████████████| 583kB 12.6MB/s
Installing collected packages: setuptools
Found existing installation: setuptools 40.6.2
Uninstalling setuptools-40.6.2:
Successfully uninstalled setuptools-40.6.2
Successfully installed setuptools-40.8.0
但“ pipenv --version”结果相同。
所以我尝试卸载并安装setuptools ，
seohuns-MBP-2:sparse_tutorial seohun$ pip uninstall setuptools
Uninstalling setuptools-40.8.0:
Would remove:
/anaconda3/bin/easy_install
/anaconda3/bin/easy_install-3.6
/anaconda3/lib/python3.6/site-packages/easy_install.py
/anaconda3/lib/python3.6/site-packages/pkg_resources/*
/anaconda3/lib/python3.6/site-packages/setuptools-40.8.0.dist-info/*
/anaconda3/lib/python3.6/site-packages/setuptools/*
Proceed (y/n)? y
Successfully uninstalled setuptools-40.8.0
seohuns-MBP-2:sparse_tutorial seohun$ pip install setuptools
Requirement already satisfied: setuptools in /anaconda3/lib/python3.6/site-packages/setuptools-40.8.0-py3.6.egg (40.8.0)
为什么“我已经卸载了setuptools”，但“已经满足要求：/anaconda3/lib/python3.6/site-packages/setuptools-40.8.0-py3.6.egg（40.8.0）中的setuptools”？因此，我尝试在Finder中删除setuptools-40.8.0-py3.6.egg目录，但是我无法删除它，因为它受到了保护。我怀疑这可能是pkg_resources错误的原因。
我还尝试了 pipenv run pip install --force-reinstall setuptools ，
Traceback (most recent call last):
File "/usr/local/Cellar/pipenv/2018.11.26/libexec/bin/pipenv", line 6, in <module>
from pkg_resources import load_entry_point
ModuleNotFoundError: No module named 'pkg_resources'
但不起作用，因为所有pipenv命令均已失效。
所以我卸载并安装pipenv，
seohuns-MBP-2:sparse_tutorial seohun$ pip uninstall pipenv
Uninstalling pipenv-2018.11.26:
Would remove:
/Users/seohun/.local/bin/pipenv
/Users/seohun/.local/bin/pipenv-resolver
/Users/seohun/.local/lib/python3.6/site-packages/pipenv-2018.11.26.dist-info/*
/Users/seohun/.local/lib/python3.6/site-packages/pipenv/*
Proceed (y/n)? y
Successfully uninstalled pipenv-2018.11.26
seohuns-MBP-2:sparse_tutorial seohun$ pip install pipenv
Collecting pipenv
Using cached https://files.pythonhosted.org/packages/13/b4/3ffa55f77161cff9a5220f162670f7c5eb00df52e00939e203f601b0f579/pipenv-2018.11.26-py3-none-any.whl
Requirement already satisfied: virtualenv-clone>=0.2.5 in /Users/seohun/.local/lib/python3.6/site-packages (from pipenv) (0.4.0)
Requirement already satisfied: setuptools>=36.2.1 in /anaconda3/lib/python3.6/site-packages (from pipenv) (40.8.0)
Requirement already satisfied: virtualenv in /Users/seohun/.local/lib/python3.6/site-packages (from pipenv) (16.4.0)
Requirement already satisfied: pip>=9.0.1 in /anaconda3/lib/python3.6/site-packages (from pipenv) (19.0.2)
Requirement already satisfied: certifi in /anaconda3/lib/python3.6/site-packages (from pipenv) (2018.10.15)
Installing collected packages: pipenv
Successfully installed pipenv-2018.11.26
，但是pipenv命令仍然不起作用。我尝试了“ sudo chown seohun easy-install.pth ”，但是
chown: easy-install.pth: No such file or directory
接下来，我按照堆栈溢出答案尝试了 pip install ez_setup，pip installly，easy_install -U setuptools，pip3 install --upgrade virtualenv ，它们都可以正常工作，但是pipenv命令仍然不起作用。 BTW pipenv已连接到Python3。
seohuns-MBP-2：sparse_tutorial seohun $其中python / anaconda3 / bin / python
有什么可以尝试的吗？