ModuleNotFoundError: No module named 'covidsimulation.simulation'

[mertozler]

I have an issue. I was testing the codes in the article on Medium, but I had a problem adding modules . I tried to download covidsimulation.simulation with pip but I have an error like this:
"ERROR: Could not find a version that satisfies the requirement covidsimulation.simulation (from versions: none)
ERROR: No matching distribution found for covidsimulation.simulation"
Can you help me for solving this problem?