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我有一个数据框如下:
Neighborhood, City, State, Country
Westside, Boston, MA,USA
South District, New York,NY,USA
Business Town,,OR,USA
Shopping District,,Wellington,New Zealand
Big Mountain,,,Australia
现在我想遍历成对的非空列
C0,C1 C1,C2 C2,C3
并创建如下所示的数据框。但是 如果 C1 为空或 null,则将 C0 与 C2 配对,依此类推
Root Child
OR Business Town
USA OR
New Zealand Wellington
Wellington. Shopping District
Boston Westside
MA Boston
USA MA
New York South District
NY New York
USA NY
Australia Big Mountain