<human>:  How to transform a time series pandas dataframe using the index attributes?
<bot>: Here is some code to transform time series `df` into a pivot table aggregated by column 'Close' using column `df.index.date` as index and values of column `df.index.time` as columns

pd.pivot_table(df, index=df.index.date, columns=df.index.time, values='Close')

#Warning: this code generation is experimental. Please inspect the code for any bugs before executing.