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Python: How to fix "pyenv: bash: command not found"

I use pyenv to manage my Python environments and I get the following when simply running bash.

$ bash
pyenv: bash: command not found

I was trying to troubleshoot why pipenv shell failed with the above error, which is how I found out even bash wasn't working. I tried updating pipenv via brew and ran pyenv rehash to regenerate the shims. And bash is definitely present.

$ which bash
/bin/bash

I expected that if pyenv doesn't find a command, the subsequent paths specified by the PATH environment variable will be searched. Interestingly if I execute some non-existant command I don't get a pyenv error.

$ someboguscommand
-bash: someboguscommand: command not found

This suggests to me that pyenv doesn't even search for a matching command in this case and the subsequent paths in PATH are searched, so there must be some special handling with bash.

Solution

  • The issue was that I had the following line in my .bashrc, which was being invoked when running bash. It's a line that I no longer need:

    . virtualenvwrapper.sh

    This was in turn invoking pyenv's virtualwrapper shim:

    $ which virtualenvwrapper.sh
/Users/greg/.pyenv/shims/virtualenvwrapper.sh

    That's what caused the failure. I was able to identify this by running a debug trace with bash:

    $ bash -x
+ . virtualenvwrapper.sh
++ set -e
++ '[' -n '' ']'
++ program=bash
++ [[ bash = \p\y\t\h\o\n* ]]
++ export PYENV_ROOT=/Users/greg/.pyenv
++ PYENV_ROOT=/Users/greg/.pyenv
++ exec /usr/local/Cellar/pyenv/1.2.13_1/libexec/pyenv exec bash
pyenv: bash: command not found

    Thank you for the useful comments "that other guy", Charles Duffy, and rje!