NOTICE

The upcoming release of Featuretools 1.0.0 contains several breaking changes. Users are encouraged to test this version prior to release by installing from GitHub:

pip install https://github.com/alteryx/featuretools/archive/woodwork-integration.zip

For details on migrating to the new version, refer to Transitioning to Featuretools Version 1.0. Please report any issues in the Featuretools GitHub repo or by messaging in Alteryx Open Source Slack.


featuretools.EntitySet.add_last_time_indexes

EntitySet.add_last_time_indexes(updated_dataframes=None)[source]

Calculates the last time index values for each dataframe (the last time an instance or children of that instance were observed). Used when calculating features using training windows. Adds the last time index as a series named _ft_last_time on the dataframe.

Parameters

updated_dataframes (list[str]) – List of dataframe names to update last_time_index for (will update all parents of those dataframes as well)