StringIO Object to DataFeed

*Jenel Videos*

I have a csv file containing data from multiple symbols. I extracted them one by one from the main csv file and saved it to memory using StringIO. Does anyone know how I can add the StringIO object to the datafeed?

d={}
reader = csv.reader(open("a.csv"))
for row in reader:
    if(not (row[0] in d.keys())):
        d[row[0]] = StringIO()
        csv.writer(d[row[0]]).writerow(row)
    else:
        csv.writer(d[row[0]]).writerow(row)

data = btfeed.GenericCSVData(
    dataname=d["FETBTC"].getvalue(),

    nullvalue=0.0,

    dtformat=('%Y-%m-%d'),

    datetime=0,
    high=1,
    low=2,
    open=3,
    close=4,
    volume=5,
    openinterest=-1
)

*Jenel Videos*

See below for the error I came across above code. I also tried the StringIO Object itself but I also got an error TypeError: expected str, bytes or os.PathLike object, not _io.StringIO.

OSError: [Errno 22] Invalid argument: 'FETBTC,2020-01-13,23:00:00,0.00000507,0.00000511,0.00000503,0.00000504,2515111.00000000\r\nFETBTC,2020-01-14,00:00:00,0.00000503,0.00000506,0.00000498,0.00000503,3023068.00000000\r\nFETBTC,2020-01-14,01:00:00,0.00000504,0.00000505,0.00000498,0.00000502,1640454.00000000

ab_trader

Probably write new data feed class which reads StringIO objects.

backtrader

@Jenel-Videos said in StringIO Object to DataFeed:

data = btfeed.GenericCSVData(
dataname=d["FETBTC"].getvalue(),

After creating file (a pseudo-file) actually, why do you pass a string instead of the file-like object which you have already created?

The documentation says it:

    Specific parameters (or specific meaning):

      - ``dataname``: The filename to parse or a file-like object