<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def create_current_pb(self, ):
 """Create a push button and place it in the corner of the tabwidget :returns: the created button :rtype: :class:`QtGui.QPushButton` :raises: None """

        pb = QtGui.QPushButton("Select current")
        self.selection_tabw.setCornerWidget(pb)
        return pb