[PyQt] Docs on how pylupdate4 finds strings?

[Dave Peterson]

I'm having trouble getting pylupdate4 (version 4.5.1) to detect strings 
that need translation in my python files.   And after numerous searches, 
I can't seem to find any docs explaining how the tool goes about finding 
strings that need translation, so I'm not even sure how to go about 
debugging things.

Ideally, I'd like my project to have a util.py module containing a tr() 
function that I can then use throughout the rest of my code.   This 
module might look something like:

    from PyQt4 import QtGui
    def tr(context, text):
       return QtGui.QApplication.translate(context, text, None, 
QtGui.QApplication.UnicodeUTF8)

And then in any other project module I could simply do:

    from util import tr
    CONTEXT='MainMenu'
    menu1 = Menu(name=tr(CONTEXT, u'File'), ....)
    menu2 = Menu(name=tr(CONTEXT, u'View'), ....)

    etc.

However, for the life of me, I can't get pylupdate4 to detect the 
strings 'File' and 'View'.   I've even tried "inlining" by doing 
something like:

    menu1 = Menu(name=QtGui.QApplication.translate('MainMenu', u'File'), 
...)

but that doesn't work either.


Can anyone offer advice or point me at some docs for how pylupdate4 does 
it's scanning?


-- Dave