When I upgrade Python version by homebrew, pipenv die.

Issue description

First of all, I have Python 3.6 in my mac, this Python was installed by homebrew.

I installed pipenv by this command:

python3 -m pip install pipenv

now, I upgrade Python3 to Python 3.7 by the following command:

brew upgrade python3
brew cleanup

Now, pipenv has dead.

when I run command pipenv, it will raise the error msg：

$ /usr/local/bin/pipenv
zsh: /usr/local/bin/pipenv: bad interpreter: /usr/local/opt/python/bin/python3.6: no such file or directory

Expected result

Pipenv work.

Actual result

$ /usr/local/bin/pipenv
zsh: /usr/local/bin/pipenv: bad interpreter: /usr/local/opt/python/bin/python3.6: no such file or directory

[mAAdhaTTah]

So wait, the first recommendation in the README is not the best way to install pipenv? That seems like a problem.

In any case, I solved this by doing brew install --force pipenv then brew link --overwrite pipenv to do a reinstall.

[m0j0hn]

I fixed this by manually updating my /usr/local/bin/pipenv file.

I met this problem after upgrading from 3.7 to 3.8.

I edited /usr/local/bin/pipenv file and changed #!/usr/local/opt/python/bin/python3.7

to #!/usr/local/opt/python/bin/python3.8

which seemed to fix the issue, for me