Notes.txt

Different way to get user data:
  There are 3 methods of getting user data from a view to a controller. See the image below.
        URL query parameters
        Forms
        JSON
    URL query parameters:
        URL query parameters are listed as key-value pairs at the end of a URL, preceding a "?" question mark. 
        E.g. www.example.com/hello?my_key=my_value.

    Form data:
        request.form.get('<name>') reads the value from a form input control (text input, number input, password input, etc) by the name attribute on the input HTML element.

Note: defaults

    request.args.get, request.form.get both accept an optional second parameter, e.g. request.args.get('foo', 'my default'), set to a default value, in case the result is empty.

JSON

    request.data retrieves JSON as a string. Then we'd take that string and turn it into python constructs by calling json.loads on the request.data string to turn it into lists and dictionaries in Python.

Three methods of getting user data in Flask (URL query parameters, form input, and request.data)