df = df.reindex(sorted(df.columns), axis=1)

这假定对列名称进行排序将给出所需的顺序.如果您的列名不会按字典顺序排序(例如，如果您希望列Q10.3出现在Q9.1之后)，则需要进行其他排序，但这与熊猫无关.

This assumes that sorting the column names will give the order you want. If your column names won't sort lexicographically (e.g., if you want column Q10.3 to appear after Q9.1), you'll need to sort differently, but that has nothing to do with pandas.