def setStandardButtons(self, buttons):
"""Convenience method to set standard buttons in the button box.
Accepts a sequence of string names from the standardbuttons constant,
or a QDialogButtonBox.StandardButtons value.
"""
if isinstance(buttons, (set, tuple, list)):
buttons = functools.reduce(operator.or_,
map(standardbuttons.get, buttons),
QDialogButtonBox.StandardButtons())
self._buttonBox.setStandardButtons(buttons)
