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python - Pandas Melt with Multi Index Data Set and Resetting Index - Why is this working? - Stack Overflow
BUG: MultiIndex set_levels is not symmetrical with get_level_values · Issue #14258 · pandas-dev/pandas · GitHub
Unexpected Behavior when Setting partial row in MultiIndex-columned- Dataframe with Series · Issue #15310 · pandas-dev/pandas · GitHub
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Create pandas DataFrame with Multiindex in Python (Example) | Set Multiple IDs | set_index Function - YouTube
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