如果大小调整模式设置为gtk.TREE_VIEW_COLUMN_AUTOSIZE，是否有办法获得gtk.TreeViewColumn想要的宽度（以像素为单位），即使当前为gtk.TREE_VIEW _COLUMN_FIXED？
我认为gtk.TreeViewColumn.cell_get_size（）将完成此任务。
示例代码：
def show_size(treeview):
col = treeview.get_column(0)
cell = col.get_cell_renderers()[0]
size = col.cell_get_position(cell)
print current size: position=%s, width=%s % size
size = col.cell_get_size()
print autosize: %s, x=%s, y=%s, w=%s, h=%s % size
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