- pivots a level of MultiIndex in the rows to become a new level in columns, effectively reshaping the data to be wider.
Example:
Alice and Bob log their mood every day. The columns are
Date|Person|Mood Dec17|Alice|80 Dec17|Bob|20 Dec18|Bob|40 Dec18|Alice|100
df.unstack()
Person|Alice|Bob Date Dec17| 75|82 Dec18|68|91 Dec19|79|85
It unstacks the innermost index.
lost? ~ Index - Data Engineering