featuretools.primitives.TimeSinceLast¶
- class featuretools.primitives.TimeSinceLast(unit='seconds')[source]¶
Calculates the time elapsed since the last datetime (default in seconds).
- Description:
Given a list of datetimes, calculate the time elapsed since the last datetime (default in seconds). Uses the instance’s cutoff time.
- Parameters
unit (str) – Defines the unit of time to count from. Defaults to seconds. Acceptable values: years, months, days, hours, minutes, seconds, milliseconds, nanoseconds
Examples
>>> from datetime import datetime >>> time_since_last = TimeSinceLast() >>> 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)] >>> time_since_last(times, time=cutoff_time) 150.0
>>> from datetime import datetime >>> time_since_last = TimeSinceLast(unit = "minutes") >>> 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)] >>> time_since_last(times, time=cutoff_time) 2.5
Methods
__init__
([unit])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
([agg_type])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
stack_on
stack_on_exclude
stack_on_self
uses_calc_time