I'd say a MOOC certificate in Python is unlikely to impress professional programmers. It may impress ordinary business persons. So in terms of hiring, it might be useful in terms of working for a business whose primary business is not programming. It probably won't directly eliminate a candidate from a job in a business whose primary business is programming.

However, there are not vast numbers of "employers of entry level developers" relative to the vast number of potential entry level developers. A job as an entry level developer is most likely to be found by job hunting not taking a MOOC. More importantly, taking a MOOC is a lot easier for many people than actively job hunting because active job hunts are hard, involve a lot of rejection and being ignored, and often take much longer than a MOOC. The key to getting an entry level Python job is to find someone who is hiring entry level Python developers.

Good luck.