They definitely see Go as direct competition, or did at various points. Some of the work that was done in Python 15 years ago is now done in Go, mostly because of its superior support for highly-parallel workloads; so Python developers have reacted and improved the parallelization story in various ways (yes, it's still not as good as it could be, but it's undoubtedly better than it was when Go took a significant bite off the ecosystem).
As for Java and C#, it is a fact that all of them joustle for the backend market together with Python. Java and C# were there first and have massive commercial backing pushing them, but Python has slowly carved a larger and larger role on the back of technical merit. As long as it continues to do that, I don't think you need to worry.
I don’t see Python having a lot to offer in terms of technical merit really. Python’s strength is language ergonomics and fun factor. I hope they keep it that way.
