如何用pyenv更新Python版本（3.6.2至3.6.5）及操作步骤咨询

Hey there! Your core approach is totally on the right track—let me break this down into a streamlined, error-proof process with some handy tips to make it smoother:

• First, install the new Python version
  Start by installing Python 3.6.5 via pyenv, just as you thought:

  pyenv install 3.6.5
  

  If you want to confirm 3.6.5 is available (in case of any minor delays in the pyenv repo), you can list all available 3.6.x versions with:

  pyenv install --list | grep 3.6
  

• Export your existing package list
  Before switching, grab a snapshot of all packages in your 3.6.2 environment. First activate the old version:

  # Use `pyenv global 3.6.2` if it's your system-wide default
  pyenv local 3.6.2
  

  Then export the packages to a requirements file:

  pip freeze > requirements.txt
  

• Switch to the new environment and install packages
  Activate your freshly installed 3.6.5 version:

  # Use `pyenv global 3.6.5` for system-wide use
  pyenv local 3.6.5
  

  It’s smart to upgrade pip first in the new environment to avoid compatibility hiccups:

  pip install --upgrade pip
  

  Now install all your old packages from the requirements file:

  pip install -r requirements.txt
  

• Verify everything works
  Run your projects, scripts, or tests in the 3.6.5 environment to make sure all dependencies function as expected. Don’t skip this step—better safe than sorry!

• Uninstall the old version (optional)
  Once you’re confident the new environment is stable and you no longer need 3.6.2, you can remove it:

  pyenv uninstall 3.6.2
  

  Just double-check that no existing projects are still configured to use 3.6.2 before deleting it.

Quick note for pyenv-virtualenv users #

If you’re using virtual environments tied to specific Python versions, create a new virtualenv for 3.6.5 first, then repeat the requirements export/import steps into that new virtualenv instead of the base 3.6.5 environment.

内容的提问来源于stack exchange，提问作者adamstueckrath