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On 1.5.x:
df = pd.DataFrame({'a': [1, 1, 2], 'b': [3, 4, 5]}).set_index(['a', 'b']) print(df.index.isin([])) # [False False False]
On 2.0.x:
TypeError: Cannot infer number of levels from empty list
Seems like an Index consisting of False is the right answer here.