Created attachment 18 [details]
Example of lack of setMapping

Qt4 provides the QSignalMapping::setMapping method that works fine with PyQt4,
but PySide lacks that method and uses setMappingBy{Id, Object, String}. This
breaks backward compatibility. I attached a test-case from a previous working
PyQt4 code that returns the following error:

Traceback (most recent call last):
  File "productcontroller-pyside.py", line 81, in nuevo_boton
    self.signalMapper.setMapping(boton, boton.text())
AttributeError: 'QSignalMapper' object has no attribute 'setMapping'

The documentation in 

http://www.pyside.org/docs/pyside/PySide/QtCore/QSignalMapper.html 

is unclear about this, as the API has no reference to setMapping, but to the
methods I menctioned before, and the example provided in the documentation
refers to setMapping:

...
self.connect(SIGNAL("clicked()"), self.signalMapper, SLOT("map()"))
self.signalMapper.setMapping(button, text)
...

I compiled Pyside from source code using git:

git://gitorious.org/pyside/pyside.git