bt bt.get gives IndexError: tuple index out of range

import bt
data = bt.get('aapl', start='2020-01-01')

Gives the following error:

`---------------------------------------------------------------------------
IndexError                                Traceback (most recent call last)
<ipython-input-12-d7d21c925953> in <module>
      1 # download data
----> 2 data = bt.get('aapl', start='2020-01-01')
      3 
      4 # calculate moving average DataFrame using pandas' rolling_mean
      5 #import pandas as pd

~/anaconda3/envs/stocks/lib/python3.8/site-packages/decorator.py in fun(*args, **kw)
    229             if not kwsyntax:
    230                 args, kw = fix(args, kw, sig)
--> 231             return caller(func, *(extras + args), **kw)
    232     fun.__name__ = func.__name__
    233     fun.__doc__ = func.__doc__

~/anaconda3/envs/stocks/lib/python3.8/site-packages/ffn/utils.py in _memoize(func, *args, **kw)
     18     # kw is not always set - check args
     19     if refresh_kw in func.__code__.co_varnames:
---> 20         if args[func.__code__.co_varnames.index(refresh_kw)]:
     21             refresh = True
     22 

IndexError: tuple index out of range
`

Using Jupyter Notebook, Python 3.8.9, bt 0.2.9, pandas 1.2.4

Any help would be appreciated.

Apr 25 '21 00:04 cgates30

I bumped into the same issue earlier this week. I was able to solve it by upgrading decorator to version 5.0.7.

Apr 25 '21 14:04 samuel-poon

I'm not familiar with updating the decorator, so I will look into that. Thanks for the tip. On another note, I tried the same on a different computer with same versions posted above and it worked. So that indicates there's something else on my installation that is causing the error.

Apr 25 '21 15:04 cgates30

Which version of decorator do you have on the other computer? You should be able to upgrade it using pip3 install decorator --upgrade.

Apr 25 '21 15:04 samuel-poon

I updated from decorator 4.4.2 to 5.0.7, but unfortunately I'm getting the same error.

Apr 25 '21 16:04 cgates30

I uninstalled anaconda3, reinstalled navigator, and pip install bt. Still getting the same error. Using Ubuntu 20.10. Used navigator installer Anaconda3-2020.11-Linux-x86_64.sh

I did notice my decorator is now 5.0.6 after the reinstall, so I will update that again.

pip shows decorator is updated to 5.0.7, but navigator shows 5.0.6

Apr 25 '21 17:04 cgates30

This is strange. What version of ffn do you have? bt.get() should be an alias for ffn.get().

Apr 26 '21 21:04 samuel-poon

I have ffn (0.3.6)

Apr 28 '21 01:04 cgates30

I was having same issue. I solved it updating decorator from 5.0.6 to 5.0.7 using pip3 install decorator --upgrade

Apr 28 '21 13:04 O1dBoy

I have the same issue after updating everything: bt 0.2.9 ffn 0.3.6 decorator 5.0.9

May 17 '21 01:05 ch3st3rt0n

i upgraded the decorator. Still unable to solve. Appreciate troubleshooting suggestions.

May 27 '21 10:05 dhiraj797

I personally don't have this issue while working on a MacOS, but one of my students working on a Windows OS is having this issue. I recommended upgrading the decorator as is discussed in this thread. His decorator went from 5.0.6 to 5.0.9, but he's still getting the same error:

image001-46

Has anyone found a solution?

In the mean time, for anyone interested in getting the same data of bt.get(), you can use the yfinance package like this:

import yfinance as yf

data = yf.download("FB AMZN AAPL NFLX GOOG", start="2019-12-01")
data = data.loc[:,'Adj Close']
data.tail()

Jun 02 '21 03:06 JackDaoud

Are you sure it's the right version of decorator? What happens when you run the following?

import decorator
print(decorator.__version__)

The reason why I ask is because on the most recent version of decorator, return caller(func, *extras + args), **kw) is on line 232, but it appears on line 231 in your error message. This suggests that you're still using an older version.

Jun 02 '21 03:06 samuel-poon

@samuel-poon apologies for the misleading error message. That error was before updating the decorator. He told me he received the same error after updating the decorator.

Jun 02 '21 03:06 JackDaoud

My student got back to me saying that after he ran condo update -all and then restarted his kernel, bt.get() started working normally. Can anyone please test this solution and confirm?

Jun 02 '21 21:06 JackDaoud

The error is gone after upgrading decorator from 5.0.6 to 5.0.9.