pyenv.txt

dependency-------------------------------
sudo apt update
sudo apt install -y \
    make build-essential libssl-dev zlib1g-dev libbz2-dev libreadline-dev \
    libsqlite3-dev wget curl llvm libncursesw5-dev xz-utils tk-dev \
    libxml2-dev libxmlsec1-dev libffi-dev liblzma-dev git \
    libgdbm-dev libc6-dev lzma

install---------------------------------
curl https://pyenv.run | bash

link to bash-----------
add these lines to both at( ~/.bashrc and  ~/.profile ) or (~/.bash_profile if it exists)

new straight-forward------------
# Add pyenv to PATH
export PATH="$HOME/.pyenv/bin:$PATH"
eval "$(pyenv init --path)"
eval "$(pyenv init -)"
eval "$(pyenv virtualenv-init -)"

export --------------
export PYENV_ROOT="$HOME/.pyenv"
export PATH="$PYENV_ROOT/bin:$PATH"
[[ -d "$PYENV_ROOT/bin" ]] && export PATH="$PYENV_ROOT/bin:$PATH"
eval "$(pyenv init --path)"
eval "$(pyenv init -)"
eval "$(pyenv virtualenv-init -)"

reload bash by 
source ~/.bashrc
source ~/.profile 
or 
source ~/.bash_profile

verify------
pyenv --version

already installed versions---
pyenv versions

check supported versions-------
pyenv install --list
--------------------------pyenv installed-------------------
install python with pyenv----------------------------
pyenv install 3.8.12

Installed Python-3.8.12 to /home/irfan/.pyenv/versions/3.8.12-----------

pyenv uninstall 3.11.9/envs/speech_env

----------global/local-------------------------------
Install Python 3.11 and set it as the global version:------------------
pyenv install 3.11
pyenv global 3.11
pip install pip --upgrade
pyenv local 3.11
---------------venv by pyenv---------------
create----------
pyenv virtualenv 3.8.12 dashboard_env
activate----------
pyenv activate dashboard_env
pyenv activate speech_env

check python version---
python --version
or 
pyenv version