Help With YahooFinance Data

[rishabmah5]

I am trying to get some YahooFinance Data to backtest my strategy. Below is the code that I am running.

import backtrader as bt
import backtrader.feeds as btfeeds
from datetime import datetime

cerebro = bt.Cerebro()
cerebro.broker.setcash(100000)
data = btfeeds.YahooFinanceData(dataname="MSFT", fromdate=datetime(2016, 6, 25), todate=datetime(2021, 6, 25))
cerebro.adddata(data)
cerebro.run()

This is the error that I am getting:

Traceback (most recent call last):
  File "c:\Users\risha\PycharmProjects\PythonDataScience\BacktraderBacktesting\TestingData.py", line 10, in <module>
    cerebro.run()
  File "C:\Users\risha\anaconda3\lib\site-packages\backtrader\cerebro.py", line 1127, in run
    runstrat = self.runstrategies(iterstrat)
  File "C:\Users\risha\anaconda3\lib\site-packages\backtrader\cerebro.py", line 1210, in runstrategies
    data._start()
  File "C:\Users\risha\anaconda3\lib\site-packages\backtrader\feed.py", line 203, in _start
    self.start()
  File "C:\Users\risha\anaconda3\lib\site-packages\backtrader\feeds\yahoo.py", line 355, in start
    super(YahooFinanceData, self).start()
  File "C:\Users\risha\anaconda3\lib\site-packages\backtrader\feeds\yahoo.py", line 94, in start
    super(YahooFinanceCSVData, self).start()
  File "C:\Users\risha\anaconda3\lib\site-packages\backtrader\feed.py", line 674, in start
    self.f = io.open(self.p.dataname, 'r')
FileNotFoundError: [Errno 2] No such file or directory: 'MSFT'

Could someone please help me solve this?

[Dim Trader]

@rishabmah5 Please use yfinance to download data from yahoo finance.

pip install yfinance

And use this code

import yfinance as yf
import backtrader as bt

data = bt.feeds.PandasData(dataname=yf.download('TSLA', '2018-01-01', '2019-01-01'))

cerebro = bt.Cerebro()
cerebro.adddata(data)

[rishabmah5]

@dim-trader
Thank you soo much

[run-out]

@rishabmah5 This is a known error that was just fixed on Backtrader2 today. See here for the fix. You can install backtrader two, or just add the one line in to your backtrader library in feeds/yahoo.py

[Madhoon]

@dim-trader

from datetime import datetime
import backtrader as bt
from backtrader import plot
import yfinance as yf
# Create a subclass of Strategy to define the indicators and logic

class SmaCross(bt.Strategy):
    # list of parameters which are configurable for the strategy
    params = dict(
        pfast=50,  # period for the fast moving average
        pslow=200   # period for the slow moving average
    )

    def __init__(self):
        sma1 = bt.ind.SMA(period=self.p.pfast)  # fast moving average
        sma2 = bt.ind.SMA(period=self.p.pslow)  # slow moving average
        self.crossover = bt.ind.CrossOver(sma1, sma2)  # crossover signal

    def next(self):
        if not self.position:  # not in the market
            if self.crossover > 0:  # if fast crosses slow to the upside
                self.buy()  # enter long

        elif self.crossover < 0:  # in the market & cross to the downside
            self.close()  # close long position


cerebro = bt.Cerebro()  # create a "Cerebro" engine instance
cerebro.broker.setcash(100000)
# Create a data feed
data = bt.feeds.PandasData(dataname=yf.download('KPITTECH.NS', '2019-01-01', '2021-07-06'))

cerebro.adddata(data)  # Add the data feed

cerebro.addstrategy(SmaCross)  # Add the trading strategy
cerebro.run()  # run it all
cerebro.plot()  # and plot it with a single command




this is my code⬆️ and this is the error⬇️


Traceback (most recent call last):
  File "/Users/madhurjodhwani/Desktop/python/hey.py", line 37, in <module>
    cerebro.plot()  # and plot it with a single command
  File "/opt/homebrew/lib/python3.9/site-packages/backtrader/cerebro.py", line 974, in plot
    from . import plot
  File "/opt/homebrew/lib/python3.9/site-packages/backtrader/plot/__init__.py", line 42, in <module>
    from .plot import Plot, Plot_OldSync
  File "/opt/homebrew/lib/python3.9/site-packages/backtrader/plot/plot.py", line 44, in <module>
    from . import locator as loc
  File "/opt/homebrew/lib/python3.9/site-packages/backtrader/plot/locator.py", line 35, in <module>
    from matplotlib.dates import (HOURS_PER_DAY, MIN_PER_HOUR, SEC_PER_MIN,
ImportError: cannot import name 'warnings' from 'matplotlib.dates' (/opt/homebrew/lib/python3.9/site-packages/matplotlib/dates.py)

I am trying to run cerebro.plot() and it is giving this error, also I am new to finance and wnant to learn this bactrader,is there any course or any videos to help me with this?

[run-out]

@madhoon Google: backtrader https://stackoverflow.com/questions/63471764/importerror-cannot-import-name-warnings-from-matplotlib-dates

First response: Stack Overflow

[run-out]

@run-out Correction:

Google: ImportError: cannot import name 'warnings' from 'matplotlib.dates'

[rishabmah5]

@madhoon said in Help With YahooFinance Data:

I actually had the same issue myself. For some reason, the cerebro.plot() only works with a specific version of matplotlib. Go to your terminal and run

pip install matplotlib==3.2.2.

That will allow you to plot the graphs.

[Madhoon]

@run-out Got it,thank you, hey, I am looking for a detailed course on studying the backtrader, any help?

[run-out]

@madhoon I haven't heard of any courses. Docs, community and our old pal google. Good luck!

[DIGITAL MARKETING 0]

It seems like the issue you're encountering is due to Backtrader not being able to find the data file 'MSFT'. To resolve this, you can try using the Yahoo Finance API to fetch data dynamically instead of reading it from a local file. Here's a modified version of your code:

import backtrader as bt
import backtrader.feeds as btfeeds
from datetime import datetime

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

def next(self):
    if self.dataclose[0] < self.dataclose[-1]:
        # Buy logic here
        pass
    elif self.dataclose[0] > self.dataclose[-1]:
        # Sell logic here
        pass

cerebro = bt.Cerebro()
cerebro.broker.setcash(100000)

data = btfeeds.YahooFinanceData(dataname="MSFT", fromdate=datetime(2016, 6, 25), todate=datetime(2021, 6, 25))

cerebro.adddata(data)
cerebro.addstrategy(MyStrategy)

cerebro.run()

This code sets up a simple Backtrader strategy and fetches the data directly from Yahoo Finance using the YahooFinanceData feed. Make sure you have an active internet connection when running this code.

Your Backtrader issue is a bit like having an unexpected glitch during Christmas preparations. Just as you troubleshoot and find solutions to ensure your strategy runs smoothly, during Christmas, we often encounter unforeseen challenges and adapt to create a joyful and memorable holiday experience. Both require patience, problem-solving, and a positive spirit.

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