backtrader.observers.broker module

Broker Observer Module - Cash and value tracking.

This module provides observers for tracking broker cash and portfolio value.

Classes:

Cash: Observer that tracks current cash level. Value: Observer that tracks portfolio value.

示例

>>> cerebro = bt.Cerebro()
>>> cerebro.addobserver(bt.observers.Broker)

class backtrader.observers.broker.Cash

基类：Observer

This observer keeps track the current amount of cash in the broker

Params: None

plotinfo = <backtrader.metabase.plotinfo_obj object>

next()

Update the cash value for the current period.

Gets current cash amount from the broker.

frompackages = ()

packages = ()

class backtrader.observers.broker.Value

基类：Observer

This observer keeps track of the current portfolio value in the broker including the cash

Params:

• fund (default: None)

  If None, the actual mode of the broker (fundmode - True/False) will be autodetected to decide if the returns are based on the total net asset value or on the fund value. See set_fundmode in the broker documentation

  Set it to True or False for a specific behavior

plotinfo = <backtrader.metabase.plotinfo_obj object>

__init__(*args, **kwargs)

Wrapped __init__ that properly handles observer initialization

start()

Start the Value observer and determine fund mode.

Detects or sets fund mode for value calculation.

next()

Update the portfolio value for the current period.

Gets value from broker based on fund mode setting.

frompackages = ()

packages = ()

class backtrader.observers.broker.Broker

基类：Observer

This observer keeps track of the current cash amount and portfolio value in the broker (including the cash)

Params: None

alias = ('CashValue',)

plotinfo = <backtrader.metabase.plotinfo_obj object>

__init__(*args, **kwargs)

Wrapped __init__ that properly handles observer initialization

start()

Start the Broker observer and configure plotting.

Determines fund mode and configures plot settings.

next()

Update cash and value for the current period.

Gets current cash and portfolio value from the broker.

frompackages = ()

packages = ()

class backtrader.observers.broker.FundValue

基类：Observer

This observer keeps track of the current fund-like value

Params: None

alias = ('FundShareValue', 'FundVal')

plotinfo = <backtrader.metabase.plotinfo_obj object>

next()

Update the fund value for the current period.

Gets current fund value from the broker.

frompackages = ()

packages = ()

class backtrader.observers.broker.FundShares

基类：Observer

This observer keeps track of the current fund-like shares

Params: None

plotinfo = <backtrader.metabase.plotinfo_obj object>

next()

Update the fund shares for the current period.

Gets current fund shares from the broker.

frompackages = ()

packages = ()