upgrade python version

1brew install python3
2brew update && brew upgrade python
3alias python=/usr/local/bin/python3

1sudo apt-get update && sudo apt-get upgrade
2sudo apt-get install python3.7

1$ sudo apt update -y
2$ sudo apt install python3.7
3

1The explanation would be too long for a grepper answer.
2So here is a link to a stackoverflow question:
3
4https://stackoverflow.com/questions/45137395/how-do-i-upgrade-the-python-installation-in-windows-10

1conda update python

1sudo update-alternatives --config python3 #Omar