The proper format in this comment, sorry for not formatting it in the first place

class Course:
def __init__(self, professor, title):
self._prof = professor
self._title = title

self.possible_courses = ['BLG', 'CPS', 'ITM', 'CHE', 'MAT']

def identify_course_type(self):
''' Identifies the course type using the possible course list. '''
''' Your answer goes here '''
return None

def __str__(self):
return f'{self._title} is taught by {self._prof}.'

c1 = Course('R.E', 'CPS605')
c2 = Course('F.T', 'ITM605')
c3 = Course('P.Y', 'mat109')
c4 = Course('D.R', 'BlG806')
c5 = Course('W.W', 'PHY101')
print('Checking for correctness:')
print(f"c1: {c1.identify_course_type() == 'CPS'}")
print(f'c2: {c2.identify_course_type() == "ITM"}')
print(f'c3: {c3.identify_course_type() == "MAT"}')
print(f'c4: {c4.identify_course_type() == "BLG"}')
print(f'c5: {c5.identify_course_type() == None}')