@gregoh This error was fixed in this file : https://github.com/mementum/backtrader/blob/master/backtrader/plot/locator.py
with PR #418
Before fix :
from matplotlib.dates import (HOURS_PER_DAY, MIN_PER_HOUR, SEC_PER_MIN, MONTHS_PER_YEAR, DAYS_PER_WEEK, SEC_PER_HOUR, SEC_PER_DAY, num2date, rrulewrapper, YearLocator, MicrosecondLocator, warnings)After fix :
import warnings (...) from matplotlib.dates import (HOURS_PER_DAY, MIN_PER_HOUR, SEC_PER_MIN, MONTHS_PER_YEAR, DAYS_PER_WEEK, SEC_PER_HOUR, SEC_PER_DAY, num2date, rrulewrapper, YearLocator, MicrosecondLocator)You can either install backtrader from its github sources or apply @sistemaon solution