how to activate virtualenv created by pyenv in bash script?

Question

I need to write a script to start gunicorn + django site which developed with pyenv the script is something like

#!/bin/bash
                                                                                
pyenv activate .ve
pyenv exec gunicorn config.wsgi:application --name mini2 --workers 8 \
--workers 8 --bind=unix:/tmp/run/mini2.socket \
--log-level=debug --log-file=-

and the error message

2021-12-06 14:09:00 [mini2@s017 mini2]$ ./prodution.sh 

Failed to activate virtualenv.

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

2021-12-06 14:09:55 [mini2@s017 mini2]$ 

I can run the script line by line. so there must be something wrong in the script , but I have no clue what's going wrong.

I had already append couple lines about pyenv in my bashrc

export PYENV_ROOT="$HOME/.pyenv"
export PATH="$PYENV_ROOT/bin:$PATH"
if command -v pyenv 1>/dev/null 2>&1; then
 eval "$(pyenv init -)"
fi

so is there anyway to activate virtualenv create by pyenv in bash script ? any suggestions ??

update:

according to Failed to activate virtualenv with pyenv

I update my .bashrc

export PYENV_ROOT="$HOME/.pyenv"
export PATH="$PYENV_ROOT/bin:$PATH"
eval "$(pyenv init -)"
eval "$(pyenv virtualenv-init -)"
#if command -v pyenv 1>/dev/null 2>&1; then
# eval "$(pyenv init -)"
#fi

but still not working.

my test script
#!/bin/bash

pyenv activate .ve

and the error 

Failed to activate virtualenv.

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

Answer 1

There is no need to pyenv activate the virtual environment in your script. Because of how virtual environments work [1], you need only use the absolute path to the Python interpreter binary. You can confirm this path using $ pyenv which python whilst your environment is activated. The most substantive thing that pyenv activate does is prepend the interpreter binary to your PATH such that python, python3, etc. will resolve to it [2]. The pyenv initialization commands in your .bashrc only serve enable shell auto-completion, rehash shims, and define a pyenv shell function [3].

TLDR:

"${PYENV_ROOT}/versions/<venv name>/bin/python" script.py