flowmachine.features.subscriber.iterative_median_filter

Class IterativeMedianFilter

IterativeMedianFilter(*, query_to_filter: flowmachine.core.query.Query, filter_window_size: int, column_to_filter: str = 'value', partition_column: str = 'subscriber', order_column: str = 'datetime')

Source: flowmachine/features/subscriber/iterative_median_filter.py

Applies an iterative median filter

Attributes

• cache

• column_names

• column_names_as_string_list

• dependencies

• fully_qualified_table_name

• index_cols

• is_stored

• query_id

• query_state

• query_state_str

• table_name

Parameters

• query_to_filter: flowmachine.core.query.Query

  Query to apply iterated median filter to.

• filter_window_size: int

  Size of filter window - must be odd, positive and more than 1.

• column_to_filter: str, default value

  Column to apply the filter to.

• partition_column: str, default subscriber

  Column to use for partitioning. May be none, in which case no partitioning is applied.

• order_column: str, default datetime

  Column to use for ordering within partitions. May be none, in which case no ordering is applied.

Methods

cache

cache

Source: flowmachine/core/query.py

Returns

• bool

  True is caching is switched on.

column_names

column_names

Source: flowmachine/features/subscriber/iterative_median_filter.py

Returns the column names.

Returns

• typing.List[str]

  List of the column names of this query.

column_names_as_string_list

column_names_as_string_list

Source: flowmachine/core/query.py

Get the column names as a comma separated list

Returns

• str

  Comma separated list of column names

dependencies

dependencies

Source: flowmachine/core/query.py

Returns

• set

  The set of queries which this one is directly dependent on.

fully_qualified_table_name

fully_qualified_table_name

Source: flowmachine/core/query.py

Returns a unique fully qualified name for the query to be stored as under the cache schema, based on a hash of the parameters, class, and subqueries.

Returns

• str

  String form of the table's fqn

index_cols

index_cols

Source: flowmachine/core/query.py

A list of columns to use as indexes when storing this query.

Returns

• ixen: list

  By default, returns the location columns if they are present and self.spatial_unit is defined, and the subscriber column.

Examples

daily_location("2016-01-01").index_cols
[['name'], '"subscriber"']

is_stored

is_stored

Source: flowmachine/core/query.py

Returns

• bool

  True if the table is stored, and False otherwise.

query_id

query_id

Source: flowmachine/core/query.py

Generate a uniquely identifying hash of this query, based on the parameters of it and the subqueries it is composed of.

Returns

• str

  query_id hash string

query_state

query_state

Source: flowmachine/core/query.py

Return the current query state.

Returns

• QueryState

  The current query state

query_state_str

query_state_str

Source: flowmachine/core/query.py

Return the current query state as a string

Returns

• str

  The current query state. The possible values are the ones defined in flowmachine.core.query_state.QueryState.

table_name

table_name

Source: flowmachine/core/query.py

Returns a uniquename for the query to be stored as, based on a hash of the parameters, class, and subqueries.

Returns

• str

  String form of the table's fqn