Remove/Disable Close Button in PyQt5

Question

I have seen questions asking if they can remove the maximize button, but I want to ask if it is possible to remove/disable the close button?

Answer 1

The answer is the same as the answer in the question you linked to. Only a slight change is necessary.

self.setWindowFlag(QtCore.Qt.WindowCloseButtonHint, False)

Answer 2

The CustomizeWindowHint flag needs to be set first before the WindowCloseButtonHint flag can be changed.

See https://stackoverflow.com/a/27496734