python-mocking | Example reference for how to mock various types | Unit Testing library

I would like to simulate inputs from the user in unittest using Python 3.8. I have a function that first asks the user which program to execute and then multiple other inputs to get the required values for the said app. I would like to simulate these inputs (input()) in unittest. I was unable to find an answer from this post, as that answer uses "inputted" text and then plugs it into a function, and does not work seamlessly with input(). I would like a solution that works seamlessly with input(), as if a human was running the program, and returns the values that the function in the program outputs. Using separate functions is very tedious and would mean updating the program twice, which is not ideal. If it the only way, I am willing to deal with it, but I would prefer not to. Here is some code that will need to be tested.

main.py:

I've read a few tutorials on mocking in Python, but I'm still struggling :-/

For example, I have a function wrapping a call to google storage to write a blob.

I'd like to mock the google.storage.Client().bucket(bucket_name) method to return an exceptions.NotFound for a specific non-existent bucket. I'm using side_effect to set the excepted exception

Do you know what I'm doing wrong?

Below is what I tried (I'm using 2 files: main2.py and main2_test.py):