title: How to make Python 3.8.7 and Python 3.9.1 coexist in order to run different Python packages such as Pickle5 and Tensorflow
body: <p>I am learning to build Chatbot in Python. The tutorial requires tensorflow, keras, pickle and nltk packages.</p>
  <p>For installing tensorflow, keras and nltk. They only can be installed using Python 3.8 or earlier version</p>
  <p>For Pickle5, it requires Python 3.9 or latest. I tried Pickle5 version 0.0.1. It can't be installed</p>
  <p>How to make Python 3.8.7 and Python 3.9.1 coexist in order to run all packages (tensorflow, keras, pickle and nltk)?</p>
  <p>Or how to install a pickle version, which can run on Python 3.8.7?</p>
  <p>Thank you</p>