Simulate a combination of Python keypresses, for controlling a game

Question

I am trying to figure out how to send not one, but a combination of python keypresses to a game. For example, let's say I want to use the SHIFT or CTRL modifier, in combination with another key. How would I accomplish this?

There are answers on how to do this for a single keypress, but not a combination. Here is an example of a single keypress solution:

Simulate Python keypresses for controlling a game