text: #Student checks grade of course that he is not in. 
  import pytest
  import System
  
  @pytest.fixture
  def grading_system():
      gradingSystem = System.System()
      gradingSystem.load_data()
      return gradingSystem
  
  def test_check_grades_wrong_course(grading_system):
      name = 'akend3'
      password = '123454321'
      grading_system.login(name, password)
      course='software_engineering'
      grades=grading_system.usr.check_grades(course)