Pandas 0.23.0 finally introduced a much cleaner solution to this problem: the level
argument to Index.unique()
:
In [3]: df.index.unique(level='co')
Out[3]: Index(['DE', 'FR'], dtype='object', name='co')
This is now the recommended solution. It is far more efficient because it avoids creating a complete representation of the level values in memory, and…
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