Update python 3

[qasema]

Did:

updating the Python version from 2.7 to 3.7 and above and updating all the related libraries and syntax error

To Test:

• clone this Repo
• make sure you have a Python version 3.7 or above installed. To check: run "python --version"
• Checkout the branch update_python3
• run 'source setup.sh' and make sure nothing breaks
• reset the database run 'python reset-db.py'
• run 'python run.py" and check the application on your browser running.
• chick all the taps, add and delete chemicals and nothing breaks and see if they are being saved in the database
• check any syntax errors from Python 2 such as print statements

[AndersonStettner]

You have a few places of commented out code blocks, why?

[AndersonStettner]

We should not be using virtualenv anymore you should just be able to use python -m venv