backtrader.bokeh.live package¶

Live functionality module.

Provides real-time data processing and client management functionality.

class backtrader.bokeh.live.LiveClient[source]¶

Bases: object

Live client.

Provides real-time plotting functionality, including: - Data filtering - Navigation controls (pause/play/forward/backward) - Data updates

doc¶: Bokeh document instance

model¶: Bokeh root model

lookback¶: Historical data retention

fill_gaps¶: Whether to fill data gaps

plotgroup¶: Plot group for filtering

NAV_BUTTON_WIDTH = 38¶

__init__(doc, app, strategy, lookback)[source]¶

Initialize live client.

Parameters:

doc – Bokeh document instance
app – BacktraderBokeh application instance
strategy – Strategy instance
lookback – Historical data retention

updatemodel()[source]¶: Update model.

next()[source]¶

Receive new data and update.

Called by LivePlotAnalyzer.next()

stop()[source]¶: Stop client.

class backtrader.bokeh.live.LiveDataHandler[source]¶

Bases: object

Live data handler.

Responsible for receiving, storing and pushing real-time data.

_doc¶: Bokeh document

_app¶: BacktraderBokeh application

_figid¶: Figure page ID

_lookback¶: Historical data retention

_fill_gaps¶: Whether to fill data gaps

__init__(doc, app, figid, lookback, fill_gaps=True, timeout=1)[source]¶

Initialize data handler.

Parameters:

doc – Bokeh document
app – BacktraderBokeh application
figid – Figure page ID
lookback – Historical data retention
fill_gaps – Whether to fill data gaps
timeout – Thread timeout

get_last_idx()[source]¶

Get last data index.

Returns:: Last index, returns -1 if no data
Return type:: int

set(df)[source]¶

Set new DataFrame and push.

Parameters:: df – New DataFrame

update()[source]¶: Notify that new data is available.

stop()[source]¶: Stop data handler.