title: Downgrading Python version on Ubuntu
body: <p>Can someone please tell me how to downgrade Python 3.6.9 to 3.6.6 on Ubuntu ? I tried the below commands but didnot work</p>
  
  <p>1) pip install python3.6==3.6.6</p>
  
  <p>2) pip install python3.6.6</p>