Failed to activate virtualenv with pyenv

I run:

pyenv activate new_app

And I get:

Failed to activate virtualenv.
Perhaps pyenv-virtualenv has not been loaded into your shell properly.
Please restart current shell and try again.

I am trying to follow this tutorial:

Other info:

bash-3.2$ python --version
Python 3.6.0
bash-3.2$ pyenv version
3.6.0 (set by /Users/me/Projects/flask_api/.python-version)
bash-3.2$ pwd
/Users/me/Projects/flask_api
bash-3.2$ pyenv versions system 3.5.1 3.5.1/envs/my_env_3_5_1
* 3.6.0 (set by /Users/me/Projects/flask_api/.python-version) 3.6.0/envs/new_app flask_app my_env_3_5_1 new_app
bash-3.2$ virtualenv --version
15.1.0
bash-3.2$ pyenv virtualenvs
3.5.1/envs/my_env_3_5_1 (created from /Users/me/.pyenv/versions/3.5.1) 3.6.0/envs/new_app (created from /Users/me/.pyenv/versions/3.6.0) flask_app (created from /System/Library/Frameworks/) my_env_3_5_1 (created from /Users/me/.pyenv/versions/3.5.1) new_app (created from /Users/me/.pyenv/versions/3.6.0)

I recently made my .bash_profile it contains:

bash-3.2$ cat ~/.bash_profile
eval "$(pyenv init -)"
eval "$(pyenv virtualenv-init -)"
exec "$SHELL"
if which pyenv-virtualenv-init > /dev/null; then eval "$(pyenv virtualenv-init -)"; fi

What should I do to properly start virtualenv?

5 Answers

That

eval "$(pyenv init -)"
eval "$(pyenv virtualenv-init -)"

should be in .bashrc, not .bash_profile. The latter is executed only by login shells, the former by all interactive shells.

5

Within ~/.zshrc file:

export PYENV_ROOT="$HOME/.pyenv"
export PATH="$PYENV_ROOT/bin:$PATH"
export PYENV_VIRTUALENV_DISABLE_PROMPT=1
eval "$(pyenv init --path)"
eval "$(pyenv init -)"
eval "$(pyenv virtualenv-init -)"

Sadly the eval lines alone (as mentioned in the pyenv and pyenv-virtualenv instructions) did not work for me.

8

1. Add the lines below to your ~/.bash_profile or ~/.zprofile

eval "$(pyenv init -)"
eval "$(pyenv virtualenv-init -)"

2. Restart shell or run the command:

source ~/.bash_profile

Note:

If you are using zsh shell (default for macOS Catalina and/or Big Sur) you have to use ~/.zprofile file rather than ~/.bash_profile

1

For me the below fixed my problem. I am using MacBook Pro thanks @Kalanos

eval "$(pyenv init --path)"
eval "$(pyenv init -)"
eval "$(pyenv virtualenv-init -)"

For mac users!

Make sure you have installed pyenv and pyenv-virtualenv using brew

If you're default shell is set to bash, add the following lines to your .bashrc by opening shell and enter,

nano ~/.bashrc

then add :

export PATH="$HOME/.pyenv/bin:$PATH"
eval "$(pyenv init --path)"
eval "$(pyenv virtualenv-init -)"

then pressCtrl + O and Enter and Ctrl + X to save changes!

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