featuretools.primitives.TimeSinceLastTrue

class featuretools.primitives.TimeSinceLastTrue

Calculates the time since the last True value.

Description:

Using a series of Datetimes and a series of Booleans, find the last record with a True value. Return the seconds elapsed between that record and the instance’s cutoff time. Return nan if no values are True.

Examples

>>> from datetime import datetime
>>> time_since_last_true = TimeSinceLastTrue()
>>> cutoff_time = datetime(2010, 1, 1, 12, 0, 0)
>>> times = [datetime(2010, 1, 1, 11, 45, 0),
...          datetime(2010, 1, 1, 11, 55, 15),
...          datetime(2010, 1, 1, 11, 57, 30)]
>>> booleans = [True, True, False]
>>> time_since_last_true(times, booleans, time=cutoff_time)
285.0

__init__()

Methods

__init__()
flatten_nested_input_types(input_types)	Flattens nested column schema inputs into a single list.
generate_name(base_feature_names, ...)
generate_names(base_feature_names, ...)
get_args_string()
get_arguments()
get_description(input_column_descriptions[, ...])
get_filepath(filename)
get_function()

Attributes

base_of
base_of_exclude
commutative
compatibility	Additional compatible libraries
default_value	Default value this feature returns if no data found.
description_template
input_types	woodwork.ColumnSchema types of inputs
max_stack_depth
name	Name of the primitive
number_output_features	Number of columns in feature matrix associated with this feature
return_type	ColumnSchema type of return
series_library
stack_on
stack_on_exclude
stack_on_self
uses_calc_time