featuretools.primitives.NumFalseSinceLastTrue

class featuretools.primitives.NumFalseSinceLastTrue

Calculates the number of False values since the last True value.

Description:

From a series of Booleans, find the last record with a True value. Return the count of False values between that record and the end of the series. Return nan if no values are True. Any nan values in the input are ignored. A True value in the last row will result in a count of 0. Inputs are converted too booleans before calculating the result.

Examples

>>> num_false_since_last_true = NumFalseSinceLastTrue()
>>> num_false_since_last_true([True, False, True, False, False])
2

__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
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
stack_on
stack_on_exclude
stack_on_self
uses_calc_time