How to use a fixture to save temporary data to use in next test using pytest

fixture.py

import pytest


class Asd(object):
 def __init__(self):
  print("initin")
  self.asd = None
  pass
 pass

class Test_SomeClass(object):

 @pytest.fixture(scope="class")
 def changefixtureval(self):
  changingval = {}
  #asd = Asd()
  # return asd
  yield changingval

 

 def test_whatever(self, changefixtureval):
     # pytest.pdb.set_trace()
     print(changefixtureval)
     assert changefixtureval == {} , "We expected a None boi"
     pass


 def test_changedaval(self, changefixtureval):
  assert changefixtureval == {}, "We expected a None boi"
  # BUt now it changes\
  changefixtureval["asd"] = "boi"
  assert True
  pass

 def test_valhaschanged(self, changefixtureval):
  print("\nchangefixtureval")
  print(changefixtureval)
  print(changefixtureval["asd"])
  assert not changefixtureval["asd"] is None, "We expected diff than None"
  assert changefixtureval["asd"] == "boi", "We expected diff than None"
  # That's all folks