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    Cerebro.run() error

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    • Cameron Piccone
      Cameron Piccone last edited by Cameron Piccone

      I am new to backtrader and have been using the Quickstart guide. Although, I can never get the Cerebro.run() function to work, I always get the error message as shown in the attached image(https://imgur.com/a/ykvDlpq). I directly copied and pasted the quick starter code, so I do not know why I keep getting this message. Here is my code:

                              unicode_literals)
      
      import datetime  # For datetime objects
      import os.path  # To manage paths
      import sys  # To find out the script name (in argv[0])
      
      # Import the backtrader platform
      import backtrader as bt
      
      
      # Create a Stratey
      class TestStrategy(bt.Strategy):
          def log(self, txt, dt=None):
              '''Logging function for this strategy'''
              dt = dt or self.datas[0].datetime.date(0)
              print('%s %s' % (dt.isoformat(),txt))
          def __init__(self):
              self.dataclose = self.datas[0].close
          def next(self):
              # Simply log the closing price of the series from the reference
              self.log('Close, %.2f' % self.dataclose[0])
      
              if self.dataclose[0] < self.dataclose[-1]:
                  # current close less than previous close
      
                  if self.dataclose[-1] < self.dataclose[-2]:
                      # previous close less than the previous close
      
                      # BUY, BUY, BUY!!! (with all possible default parameters)
                      self.log('BUY CREATE, %.2f' % self.dataclose[0])
                      self.buy()
      
      
      if __name__ == '__main__':
          # Create a cerebro entity
          cerebro = bt.Cerebro()
      
          # Add a strategy
          cerebro.addstrategy(TestStrategy)
      
          # Datas are in a subfolder of the samples. Need to find where the script is
          # because it could have been called from anywhere
          datapath = os.path.join('../data/raw/demo/orcl-1995-2014.txt')
      
          # Create a Data Feed
          data = bt.feeds.YahooFinanceCSVData(
              dataname=datapath,
              # Do not pass values before this date
              fromdate=datetime.datetime(2000, 1, 1),
              # Do not pass values before this date
              todate=datetime.datetime(2000, 12, 31),
              # Do not pass values after this date
              reverse=False)
      
          # Add the Data Feed to Cerebro
          cerebro.adddata(data)
      
          # Set our desired cash start
          cerebro.broker.setcash(100000.0)
      
          # Print out the starting conditions
          print('Starting Portfolio Value: %.2f' % cerebro.broker.getvalue())
      
          # Run over everything
          bt.Cerebro().run()
      
          # Print out the final result
          print('Final Portfolio Value: %.2f' % cerebro.broker.getvalue())
      from __future__ import (absolute_import, division, print_function,
                              unicode_literals)
      
      import datetime  # For datetime objects
      import os.path  # To manage paths
      import sys  # To find out the script name (in argv[0])
      
      # Import the backtrader platform
      import backtrader as bt
      
      
      # Create a Stratey
      class TestStrategy(bt.Strategy):
          def log(self, txt, dt=None):
              '''Logging function for this strategy'''
              dt = dt or self.datas[0].datetime.date(0)
              print('%s %s' % (dt.isoformat(),txt))
          def __init__(self):
              self.dataclose = self.datas[0].close
          def next(self):
              # Simply log the closing price of the series from the reference
              self.log('Close, %.2f' % self.dataclose[0])
      
              if self.dataclose[0] < self.dataclose[-1]:
                  # current close less than previous close
      
                  if self.dataclose[-1] < self.dataclose[-2]:
                      # previous close less than the previous close
      
                      # BUY, BUY, BUY!!! (with all possible default parameters)
                      self.log('BUY CREATE, %.2f' % self.dataclose[0])
                      self.buy()
      
      
      if __name__ == '__main__':
          # Create a cerebro entity
          cerebro = bt.Cerebro()
      
          # Add a strategy
          cerebro.addstrategy(TestStrategy)
      
          # Datas are in a subfolder of the samples. Need to find where the script is
          # because it could have been called from anywhere
          datapath = os.path.join('../data/raw/demo/orcl-1995-2014.txt')
      
          # Create a Data Feed
          data = bt.feeds.YahooFinanceCSVData(
              dataname=datapath,
              # Do not pass values before this date
              fromdate=datetime.datetime(2000, 1, 1),
              # Do not pass values before this date
              todate=datetime.datetime(2000, 12, 31),
              # Do not pass values after this date
              reverse=False)
      
          # Add the Data Feed to Cerebro
          cerebro.adddata(data)
      
          # Set our desired cash start
          cerebro.broker.setcash(100000.0)
      
          # Print out the starting conditions
          print('Starting Portfolio Value: %.2f' % cerebro.broker.getvalue())
      
          # Run over everything
          bt.Cerebro().run()
      
          # Print out the final result
          print('Final Portfolio Value: %.2f' % cerebro.broker.getvalue())
      
      1 Reply Last reply Reply Quote 0
      • B
        backtrader administrators last edited by

        Images ... (and those in external servers even less) don't help when the complete stack trace is text and the most relevant information is at the bottom (which is missing)

        In any case ... a very reasonable guess: you have not gotten the data files from the repository.

        1 Reply Last reply Reply Quote 0
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