Returns the number of weekdays this item has.
        
        :return     <int>

def weekdays(self):
        """
        Returns the number of weekdays this item has.
        
        :return     <int>
        """
        if self.itemStyle() == self.ItemStyle.Group:
            out = 0
            for i in range(self.childCount()):
                out += self.child(i).weekdays()
            return out
        else:
            dstart = self.dateStart().toPyDate()
            dend   = self.dateEnd().toPyDate()
            
            return projex.dates.weekdays(dstart, dend)