Basic Click Application
$ pip install click
$ python click_hello.py Jeff
Hello Jeff!
$ python click_hello.py Alice
Hello Alice!
Test It
$ pip install pytest
$ pytest test_click_hello.py
====== test session starts ========
platform linux -- Python 3.8.16, pytest-7.2.1, pluggy-1.0.0
rootdir: ...
collected 1 item
test_click_hello.py . [100%]
======= 1 passed in 0.02s =======