featuretools.primitives.TimeSinceLastTrue

class featuretools.primitives.TimeSinceLastTrue

计算自上次`True`值以来的时间.

Description:

使用一系列日期时间和一系列布尔值,找到最后一个`True`值的记录.返回该记录与实例的截止时间之间经过的秒数.如果没有`True`值,则返回nan.

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)	将嵌套的列模式输入展平成一个列表.
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