code: def test_dst_fix(self):
      # Daily intervals should start at time 00:00. But for some combinations of date and timezone,
      # Yahoo has time off by few hours (e.g. Brazil 23:00 around Jan-2022). Suspect DST problem.
      # The clue is (a) minutes=0 and (b) hour near 0.
      # Obviously Yahoo meant 00:00, so ensure this doesn't affect date conversion.
  
      # The correction is successful if no days are weekend, and weekly data begins Monday
  
      tkr = "AGRO3.SA"
      dat = yf.Ticker(tkr, session=self.session)
      start = "2021-01-11"
      end = "2022-11-05"
  
      interval = "1d"
      df = dat.history(start=start, end=end, interval=interval)
      self.assertTrue(
          ((df.index.weekday >= 0) & (df.index.weekday <= 4)).all()
      )
  
      interval = "1wk"
      df = dat.history(start=start, end=end, interval=interval)
      try:
          self.assertTrue((df.index.weekday == 0).all())
      except AssertionError:
          print("Weekly data not aligned to Monday")
          raise
  
imports: from .context import yfinance
  from .context import session_gbl
  import unittest
  import os
  import datetime
  import pytz
  import numpy
  import pandas
label_desc: Use image node_id 19 for calling the TestPriceHistory obj's underlying member method code with example usage: obj.test_dst_fix() without return types