如何交换两个DataFrame列? [英] How to swap two DataFrame columns?

问题描述

在MATLAB中，要交换表A的第一和第二列，可以这样做 ¹

In MATLAB, to swap the first and second columns of a table A, one would do this¹

A = A(:, [2 1 3:end]);

如果A是大熊猫DataFrame，还有类似的便捷方法吗?

Is there a similarly convenient way to do this if A were a pandas DataFrame instead?

_{¹ MATLAB使用基于1的索引.}

_{¹ MATLAB uses 1-based indexing.}

推荐答案

pandas具有执行此操作的reindex方法.您只需要按所需顺序提供一个列名列表:

pandas has reindex method that does it. You just need to give a list with the column names in the order you wish:

columns_titles = ["B","A"]
df=df.reindex(columns=columns_titles)

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