+ clean_cut_top = lambda self: self.cleaned_data.get('cut_top') or 0
+ clean_cut_bottom = lambda self: self.cleaned_data.get('cut_bottom') or 0
+ clean_cut_left = lambda self: self.cleaned_data.get('cut_left') or 0
+ clean_cut_right = lambda self: self.cleaned_data.get('cut_right') or 0
+