./panda-test.py --noheaders -> AttributeError: 'numpy.int64' object has no attribute 'lower

Jerzy

the example ./panda-test.py --noheaders in Data-Feed panda section of the documentatioin gives an error:

feeds/pandafeed.py", line 212, in <listcomp>
    colnames = [x.lower() for x in self.p.dataname.columns.values]
AttributeError: 'numpy.int64' object has no attribute 'lower'

without --noheaders works just fine.
What is a problem with --noheaders

run-out

Can you show the code you are trying to run please?

Jerzy

python ./panda-test.py --noheaders
from __future__ import (absolute_import, division, print_function,
                        unicode_literals)

import argparse

import backtrader as bt
import backtrader.feeds as btfeeds

import pandas


def runstrat():
    args = parse_args()

    # Create a cerebro entity
    cerebro = bt.Cerebro(stdstats=False)

    # Add a strategy
    cerebro.addstrategy(bt.Strategy)

    # Get a pandas dataframe
    datapath = ('../../datas/2006-day-001.txt')
# Simulate the header row isn't there if noheaders requested
    skiprows = 1 if args.noheaders else 0
    header = None if args.noheaders else 0

    dataframe = pandas.read_csv(datapath,
                                skiprows=skiprows,
                                header=header,
                                parse_dates=True,
                                index_col=0)

    if not args.noprint:
        print('--------------------------------------------------')
        print(dataframe)
        print('--------------------------------------------------')

    # Pass it to the backtrader datafeed and add it to the cerebro
                                                      
   data = bt.feeds.PandasData(dataname=dataframe)

    cerebro.adddata(data)

    # Run over everything
    cerebro.run()

    # Plot the result
    cerebro.plot(style='bar')


def parse_args():
    parser = argparse.ArgumentParser(
        description='Pandas test script')

    parser.add_argument('--noheaders', action='store_true', default=False,
                        required=False,
                        help='Do not use header rows')

    parser.add_argument('--noprint', action='store_true', default=False,
                        help='Print the dataframe')

    return parser.parse_args()


if __name__ == '__main__':
    runstrat()