Visual Studio Code on mac using python Error "syntax error: invalid syntax" at the line 'cerebro = bt.Cerebro()'

Question

I'm using VSCode with python to do some backtesting using backtrader. I just starting following a tutorial and the first test code seems to comeup with a syntax error when instantiating cerebro. Here is the code:

import backtrader as bt
from datetime import datetime

class LogClass(bt.Strategy):
  def __init__(self):
    self.dataclose = self.datas[0].close

  def log(next, txt, dt=None):
    dt = dt or self.datas[0].datetime.date(0)
    print(f'{dt} {txt}')

  def next(self):
    self.log('Close: {}'.format(self.dataclose[0])

cerebro = bt.Cerebro()

data = bt.feeds.YahooFinanceData(dataname=LogClose.params.ticker,
                             fromdate= LogClose.params.fromDate,
                             todate= LogClose.params.toDate)

cerebro.adddata(data)

cerebro.addstrategy(LogClose)

cerebro.run()

when I run the file using 'Run Python File in Terminal', I get the error

File "log.py", line 16
cerebro = bt.Cerebro()
      ^
SyntaxError: invalid syntax

I tried searching for a solution with no luck. I changed the interpreter to use python3.7, installed pylint, update pip. restarted the laptop, nothing. Help.

Answer 1

in def next() self.log() unmatched ( add a ) to the end of self.log('Close: {}'.format(self.dataclose[0])