pandas.DataFrame.stack

Stack the prescribed level(s) from columns to index.

Return a reshaped DataFrame or Series having a multi-level index with one or more new inner-most levels compared to the current DataFrame. The new inner-most levels are created by pivoting the columns of the current dataframe:

• if the columns have a single level, the output is a Series;

• if the columns have multiple levels, the new index

  level(s) is (are) taken from the prescribed level(s) and the output is a DataFrame.

The new index levels are sorted.

param level

int, str, list, default -1

Level(s) to stack from the column axis onto the index axis, defined as one index or label, or a list of indices or labels.

param dropna

bool, default True

Whether to drop rows in the resulting Frame/Series with missing values. Stacking a column level onto the index axis can create combinations of index and column values that are missing from the original dataframe. See Examples section.

return

DataFrame or Series Stacked dataframe or series.

Warning

This feature is currently unsupported by Intel Scalable Dataframe Compiler