How to use VWR

[Russell Turner]

I am new to backtrader and a novice at python. I was trying to figure out how to use the "VWR" analyzer.

from __future__ import (absolute_import, division, print_function,
                    unicode_literals)

from datetime import datetime
import backtrader as bt
import backtrader.analyzers as btanalyzers

cerebro = bt.Cerebro()

data = bt.feeds.YahooFinanceData(dataname='SPY', fromdate=datetime(2019, 1, 1),
                              todate=datetime(2019, 12, 31))
cerebro.adddata(data)

# Analyzer
cerebro.addanalyzer(btanalyzers.VWR, _name='myvwr')

thestrats = cerebro.run()
thestrat = thestrats[0]

print('VWR: ', thestrat.analyzers.myvwr.get_analysis())

I get this as a result:

VWR: OrderedDict([('vwr', 0.0)])

I think the result shouldn't be 0.0 so i think i did something wrong. Or maybe I need to show more decimal places? But i couldn't figure out how to do that?

[ab_trader]

You have no strategies to back test in your code, so it should be zero.