student_teacher.py

class Person(object):
	"""
	Returns a '''Person''' object with given name.

	"""
	def __init__(self, name):
		self.name = name

	def get_details(self):
		"Returns a string containing name of the person"
		return self.name


class Student(Person):
	"""
	Returns a '''Student''' object, takes 3 arguments, name, branch, year.

	"""
	def __init__(self, name, branch, year):
		Person.__init__(self, name)
		self.branch = branch
		self.year = year

	def get_details(self):
		"Returns a string containing student's details."
		return "%s studies %s and is in %s year." % (self.name, self.branch, self.year)


class Teacher(Person):
	"""
	Returns a '''Teacher''' object, takes a list of strings (list of papers) as argument.

	"""
	def __init__(self, name, papers):
		Person.__init__(self, name)
		self.papers = papers

	def get_details(self):
		return "%s teaches %s" % (self.name, ', '.join(self.papers))


person1 = Person('Sachin')
student1 = Student('Meet', 'EE:S', 2015)
teacher1 = Teacher('Prashad', ['C', 'C++', 'Python'])

print person1.get_details()
print student1.get_details()
print teacher1.get_details()