NOTICE

The upcoming release of Featuretools 1.0.0 contains several breaking changes. Users are encouraged to test this version prior to release by installing from GitHub:

pip install https://github.com/alteryx/featuretools/archive/woodwork-integration.zip

For details on migrating to the new version, refer to Transitioning to Featuretools Version 1.0. Please report any issues in the Featuretools GitHub repo or by messaging in Alteryx Open Source Slack.

featuretools.primitives.TimeSinceFirst

class featuretools.primitives.TimeSinceFirst(unit='seconds')

Calculates the time elapsed since the first datetime (in seconds).

Description:

Given a list of datetimes, calculate the time elapsed since the first datetime (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_first = TimeSinceFirst()
>>> 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_first(times, time=cutoff_time)
900.0

>>> from datetime import datetime
>>> time_since_first = TimeSinceFirst(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_first(times, time=cutoff_time)
15.0

__init__(unit='seconds')

Initialize self. See help(type(self)) for accurate signature.

Methods

__init__([unit])	Initialize self.
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
default_value
description_template
input_types
max_stack_depth
name
number_output_features
stack_on
stack_on_exclude
stack_on_self
uses_calc_time

featuretools.primitives.TimeSinceLast featuretools.primitives.NumUnique