lux.executor package¶

Submodules¶

lux.executor.Executor module¶

class lux.executor.Executor.Executor[source]¶

Bases: object

Abstract class for the execution engine that fetches data for a given vis on a LuxDataFrame

static compute_data_model(self)[source]¶

static compute_data_type(self)[source]¶

static compute_stats(self)[source]¶

static execute(vis_collection: lux.vis.VisList.VisList, ldf)[source]¶

static execute_aggregate(vis, ldf)[source]¶

static execute_binning(vis, ldf)[source]¶

static execute_filter(vis, ldf)[source]¶

mapping(rmap)[source]¶

reverseMapping(map)[source]¶

lux.executor.PandasExecutor module¶

class lux.executor.PandasExecutor.PandasExecutor[source]¶

Bases: lux.executor.Executor.Executor

Given a Vis objects with complete specifications, fetch and process data using Pandas dataframe operations.

static apply_filter(df: lux.core.frame.LuxDataFrame, attribute: str, op: str, val: object) → lux.core.frame.LuxDataFrame[source]¶

Helper function for applying filter to a dataframe

Parameters:	df (pandas.DataFrame) – Dataframe to filter on attribute (str) – Filter attribute op (str) – Filter operation, ‘=’, ‘<’, ‘>’, ‘<=’, ‘>=’, ‘!=’ val (object) – Filter value
Returns:	df – Dataframe resulting from the filter operation
Return type:	pandas.DataFrame

compute_data_model(ldf: lux.core.frame.LuxDataFrame)[source]¶

compute_data_type(ldf: lux.core.frame.LuxDataFrame)[source]¶

compute_dataset_metadata(ldf: lux.core.frame.LuxDataFrame)[source]¶

compute_stats(ldf: lux.core.frame.LuxDataFrame)[source]¶

static execute(vislist: lux.vis.VisList.VisList, ldf: lux.core.frame.LuxDataFrame)[source]¶

Given a VisList, fetch the data required to render the vis. 1) Apply filters 2) Retrieve relevant attribute 3) Perform vis-related processing (aggregation, binning) 4) return a DataFrame with relevant results

Parameters:	vislist (list[lux.Vis]) – vis list that contains lux.Vis objects for visualization. ldf (lux.core.frame) – LuxDataFrame with specified intent.
Returns:
Return type:	None

static execute_2D_binning(vis: lux.vis.Vis.Vis)[source]¶

static execute_aggregate(vis: lux.vis.Vis.Vis, isFiltered=True)[source]¶

Aggregate data points on an axis for bar or line charts

Parameters:	vis (lux.Vis) – lux.Vis object that represents a visualization ldf (lux.core.frame) – LuxDataFrame with specified intent.
Returns:
Return type:	None

static execute_binning(vis: lux.vis.Vis.Vis)[source]¶

Binning of data points for generating histograms

Parameters:	vis (lux.Vis) – lux.Vis object that represents a visualization ldf (lux.core.frame) – LuxDataFrame with specified intent.
Returns:
Return type:	None

static execute_filter(vis: lux.vis.Vis.Vis)[source]¶

static execute_sampling(ldf: lux.core.frame.LuxDataFrame)[source]¶

mapping(rmap)¶

reverseMapping(map)¶

lux.executor.SQLExecutor module¶

class lux.executor.SQLExecutor.SQLExecutor[source]¶