zsh auto activate deactivate .venv environment if found in a folder. make sure this is added to your `~/.alias` file and it is sourced in your `.zshrc` via e.g. `source ~/.alias`.

.alias

# NOTE auto activate .venv - https://stackoverflow.com/a/63955939
autoload -Uz add-zsh-hook
add-zsh-hook precmd automatically_activate_python_venv

function automatically_activate_python_venv() {
  if [[ -z $VIRTUAL_ENV ]] ; then
    activate_venv
  else
    parentdir="$(dirname ${VIRTUAL_ENV})"
    if [[ "$PWD"/ != "$parentdir"/* ]] ; then
      deactivate
      activate_venv
    fi
  fi
}

function activate_venv() {  
  local d n
  d=$PWD
  
  until false 
  do 
  if [[ -f $d/.venv/bin/activate ]] ; then 
    source $d/.venv/bin/activate
    break
  fi
    d=${d%/*}
    # d="$(dirname "$d")"
    [[ $d = *\/* ]] || break
  done
}