@sdevaux

I got the same error by using the following code.

import pandas as pd
import backtrader as bt
import datetime
import refinitiv.dataplatform.eikon as ek


ek.set_app_key('DEFAULT_CODE_BOOK_APP_KEY') 
 
df_price = ek.get_timeseries('IBM.N')
cerebro = bt.Cerebro()
feed = bt.feeds.PandasData(dataname=df_price)
cerebro.adddata(feed)
cerebro.addanalyzer(bt.analyzers.AnnualReturn, _name='areturn')
cerebro.run()
cerebro.plot()

The error is:

/opt/conda/lib/python3.8/site-packages/backtrader/plot/locator.py in <module>
     33 from matplotlib.dates import AutoDateFormatter as ADFormatter
     34 
---> 35 from matplotlib.dates import (HOURS_PER_DAY, MIN_PER_HOUR, SEC_PER_MIN,
     36                               MONTHS_PER_YEAR, DAYS_PER_WEEK,
     37                               SEC_PER_HOUR, SEC_PER_DAY,

ImportError: cannot import name 'warnings' from 'matplotlib.dates' (/opt/conda/lib/python3.8/site-packages/matplotlib/dates.py)

The same code runs fine on my Jupyter Notebook environment.

I searched this error on Google and found that it could be the matplotlib or backtrader installation problem.

Please try to contact Eikon or Refinitiv Workspace support team via MyRefinitiv to verify this issue in Codebook.

hi @sdevaux ,

Could you post the full code for an investigation, please?

Hi @raksina.samasiri ,

Thanks for your reply, here is my code :

import pandas as pd
import backtrader as bt
import datetime



cerebro = bt.Cerebro()
feed = bt.feeds.PandasData(dataname=df_price)
cerebro.adddata(feed)
cerebro.addanalyzer(bt.analyzers.AnnualReturn, _name='areturn')
cerebro.run()
cerebro.plot()

df_price is just a DataFrame with the price of one stock.

It works outside of CodeBook because I change the import in BackTrader of 'warnings'. (cf https://community.backtrader.com/topic/2784/cannot-import-name-warnings-from-matplotlib-dates/5)

Unfortuattly I can't do it in Codebook.

Thanks,

Samuel