featuretools.primitives.TimeSinceLastTrue#

class featuretools.primitives.TimeSinceLastTrue[source]#

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