How to use pipenv on mac?

Question

When install it by pip(pip install pipenv), on zsh shell can't find the command pipenv.

If install it by brew: brew install pipenv, then run pipenv shell, got error

Loading .env environment variables...
Launching subshell in virtual environment...
Traceback (most recent call last):
  File "/usr/local/Cellar/pipenv/2020.11.15/libexec/bin/pipenv", line 8, in <module>
    sys.exit(cli())
  File "/usr/local/Cellar/pipenv/2020.11.15/libexec/lib/python3.9/site-packages/pipenv/vendor/click/core.py", line 829, in __call__
    return self.main(*args, **kwargs)
  File "/usr/local/Cellar/pipenv/2020.11.15/libexec/lib/python3.9/site-packages/pipenv/vendor/click/core.py", line 782, in main
    rv = self.invoke(ctx)
  File "/usr/local/Cellar/pipenv/2020.11.15/libexec/lib/python3.9/site-packages/pipenv/vendor/click/core.py", line 1259, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/usr/local/Cellar/pipenv/2020.11.15/libexec/lib/python3.9/site-packages/pipenv/vendor/click/core.py", line 1066, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/usr/local/Cellar/pipenv/2020.11.15/libexec/lib/python3.9/site-packages/pipenv/vendor/click/core.py", line 610, in invoke
    return callback(*args, **kwargs)
  File "/usr/local/Cellar/pipenv/2020.11.15/libexec/lib/python3.9/site-packages/pipenv/vendor/click/decorators.py", line 73, in new_func
    return ctx.invoke(f, obj, *args, **kwargs)
  File "/usr/local/Cellar/pipenv/2020.11.15/libexec/lib/python3.9/site-packages/pipenv/vendor/click/core.py", line 610, in invoke
    return callback(*args, **kwargs)
  File "/usr/local/Cellar/pipenv/2020.11.15/libexec/lib/python3.9/site-packages/pipenv/cli/command.py", line 429, in shell
    do_shell(
  File "/usr/local/Cellar/pipenv/2020.11.15/libexec/lib/python3.9/site-packages/pipenv/core.py", line 2387, in do_shell
    shell.fork_compat(*fork_args)
  File "/usr/local/Cellar/pipenv/2020.11.15/libexec/lib/python3.9/site-packages/pipenv/shells.py", line 106, in fork_compat
    c = pexpect.spawn(self.cmd, ["-i"], dimensions=(dims.lines, dims.columns))
  File "/usr/local/Cellar/pipenv/2020.11.15/libexec/lib/python3.9/site-packages/pipenv/vendor/pexpect/pty_spawn.py", line 205, in __init__
    self._spawn(command, args, preexec_fn, dimensions)
  File "/usr/local/Cellar/pipenv/2020.11.15/libexec/lib/python3.9/site-packages/pipenv/vendor/pexpect/pty_spawn.py", line 276, in _spawn
    raise ExceptionPexpect('The command was not found or was not ' +
pipenv.vendor.pexpect.exceptions.ExceptionPexpect: The command was not found or was not executable: /use/bin/zsh.

There isn't a path naming /use/bin/zsh. Why it's unstable?

The shell path is

echo $SHELL
/bin/zsh

Answer 1

You're asking two questions, really. I'll answer each in a separate section:

How to fix that error

Loading .env environment variables...
...
The command was not found or was not executable: /use/bin/zsh.

Looks like in your .env file, you have PIPENV_SHELL=/use/bin/zsh. That's incorrect. Instead,

• it should be

  PIPENV_SHELL=/bin/zsh
  

• or simply

  PIPENV_SHELL=zsh
  

• or you can just remove it. Then pipenv shell will automatically use the same shell as from which you invoked it.

How to properly install pipenv on macOS

The right way to install pipenv on macOS is convoluted, but it's the only way to avoid running into trouble whenever you upgrade Python:

1. Undo what you've done so far:

   % pip uninstall pipenv
   % brew uninstall pipenv
   

2. Add to your .zshrc file:

   eval "$( brew shellenv )"
   
   # Set your preferred python version.
   # If you just want the latest release, you don't need to
   # specify anything more than the major version number.
   export PYENV_VERSION=3
   
   # Tell pyenv where to keep your python installations.
   export PYENV_ROOT=~/.pyenv
   
   # Tell pipx where to install executables.
   # pipx is like brew, but for python.
   export PIPX_BIN_DIR=~/.local/bin
   
   # -U eliminates duplicates.
   export -U PATH path
   path=(
     $PIPX_BIN_DIR
     $PYENV_ROOT/{bin,shims}
     $path
   )
   
   # Installs/updates pipenv and all of its dependencies.
   pybake() {
     # If any commands fail, exit the function.
     setopt LOCAL_OPTIONS ERR_RETURN
   
     # We use a namespace prefix in our function's name to make sure we 
     # don't accidentally overwrite another function with the same name.
     .pybake.install-or-upgrade() {
       if command -v $1 &>/dev/null; then
         print -n "upgrade $1"
       else
         print -n "install $1"
       fi
     }
   
     # A trap on EXIT set inside a function is executed after the function 
     # completes in the environment of the caller. See
     # https://zsh.sourceforge.io/Doc/Release/Functions.html
     trap "unfunction .pybake.install-or-upgrade" EXIT
   
     brew $( .pybake.install-or-upgrade pyenv )
     pyenv install --skip-existing $PYENV_VERSION
     pip install --upgrade pip
   
     # `--user` installs to ~/.local/bin
     pip install --upgrade --user pipx
   
     pipx $( .pybake.install-or-upgrade pipenv )
   }
   

3. Run:

   % exec zsh  # Restart your shell.
   % pybake
   

4. Add to your .zshrc file:

   eval "$( pyenv init - )"
   eval "$( pip completion --zsh )"
   eval "$( register-python-argcomplete pipx )"
   

5. Run exec zsh again or open a new terminal tab.

Updating pipenv

After following the steps above, to update pipenv, all you need to do is run:

```shell
% pybake && exec zsh
```