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REGR: MultiIndex.isin with an empty iterable raises #51599

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@rhshadrach

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@rhshadrach

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.

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    BugMultiIndexRegressionFunctionality that used to work in a prior pandas versionisinisin method

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