Due to my lack of knowledge I saw:
Quote:
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calibre.gui2.dialogs.tweak_epub_ui import Ui_Dialog
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and I wrongly assumed that this refered to gui2/dialogs/tweak_epub_ui.py, which I couldn't find!
Kovid confirmed that this actually refers to gui2/dialogs/tweak_epub.ui which I do have.
(I don't know exactly how these .ui files work but I guess there is a help document somewhere.)
I downloaded calibre source some months ago so I'm not sure which version it is. How do I find out and should I update it? I am not running from source but simply using it as a means of learning calibre/Python programming.