פייתון/מחלקות

>>> a=3; type(a)
<type 'int'>
>>> b=3.0; type(b)
<type 'float'>
>>> c=[3,0]; type(c)
<type 'list'>

class student:
	pass

def make_student(id):
	s = student()
 
	s.id = id
	s.grades = {}
 
	return s;

def update_student_grade(s, subject, grade):
	s.grades[subject] = grade

def failing_student(s):
	return len( [(s, g) for (s, g) in s.grades.iteritems() if g < 60] ) > 0

class student:
	def __init__(self, id):
		self._id = id
		self._grades = {}

s = student('233445598')

class student:
	def __init__(self, id):
		self._id = id
		self._grades = {}
 
	def update_grade(self, subject, grade):
		self._grades[subject] = grade

class student:
	def __init__(self, id):
		self._id = id
		self._grades = {}
 
	def update_grade(self, subject, grade):
		self._grades[subject] = grade
 
	def failing(self):
		return len( [(s, g) for (s, g) in self._grades.iteritems() if g < 60] ) > 0

s = student('233445598')
 
s.update_grade('heshbon', 80)
s.update_grade('handasa', 49)

class Point:
	def __init__(self,x,y):
		self.x=x
		self.y=y
 
# Main:
p=Point(3.0,4.0)
print p.x,p.y

class Line:
	def __init__(self,p1,p2):
		self.p1=p1
		self.p2=p2
 
	def Length(self):
		return sqrt((self.p1.x-self.p2.x)**2 + (self.p1.y-self.p2.y)**2)
 
class Triangle:
	def __init__(self,p1,p2,p3):
		self.p1=p1
		self.p2=p2
		self.p3=p3
		l1 = Line(self.p1,self.p2)
		l2 = Line(self.p2,self.p3)
		l3 = Line(self.p3,self.p1)
		self.a = l1.Length()
		self.b = l2.Length()
		self.c = l3.Length()
 
	def Perimeter(self):
		return self.a+self.b+self.c
 
	def Area(self):
		p = 0.5*self.Perimeter()	# Semiperimeter
		# Heron's formula:
		return sqrt(p*(p-self.a)*(p-self.b)*(p-self.c))
 
>>> from math import sqrt
>>> x=Point(0.0,0.0)
>>> y=Point(3.0,0.0)
>>> z=Point(3.0,4.0)
>>> T=Triangle(x,y,z)
>>> print T.Area()
6.0