Skip to content

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

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