SET ADT Using Students courses example

Example of SET ADT in python 
Two students are taking different course . How a set data structure will help to apply some operations to obtain information.

	# set of two students courses names
	# student 1
	smith = set()
	smith.add( "CSCI-112" )
	smith.add( "MATH-121" )
	smith.add( "HIS-340" )
	smith.add( "ECON-101" )
	# stuendt 2
	roberts = set()
	roberts.add( "POL-101" )
	roberts.add( "ANTH-230" )
	roberts.add( "CSCI-112" )
	roberts.add( "ECON-101" )
	# students have taken exact same or not
	# if not then find same course
	if smith == roberts:
	print("Smith and Roberts are taking the same courses. ")
	else:
	sameCourses = smith.intersection(roberts)
	# print(sameCourses)
	if len(sameCourses) == 0:
	print("Smith and Roberts are not taking any of the same courses. ")
	else:
	print("Smith and Roberts are taking some of the same courses. ")
	# printing same courses
	for course in sameCourses:
	print(course)
	# Courses only smith is taking not roberts
	print("Courses only smith is taking not roberts")
	uniqueCourses = smith.difference(roberts)
	for course in uniqueCourses:
	print(course)

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