Python 2.5.4 (r254:67916, Dec 23 2008, 15:10:54) [MSC v.1310 32 bit (Intel)] on
win32
Type "help", "copyright", "credits" or "license" for more information.
>>> from point5 import Point
>>> p1 = Point(1, 2)
>>> p2 = Point(3, 4)
>>> p1 + p2
<point5.Point object at 0x00AAF4B0>
>>> print p1 + p2
(4, 6)
>>> print p1
(1, 2)
>>> print p2
(3, 4)
>>> p3 = p1 + p2
>>> print p3
(4, 6)
>>> class C(object):
...   x = 5
...
>>> a = C()
>>> C.x, a.x
(5, 5)
>>> C.x = 9
>>> C.x, a.x
(9, 9)
>>> a.x = 45
>>> C.x, a.x
(9, 45)
>>> C.x = 12
>>> C.x, a.x
(12, 45)
>>> b = C()
>>> b.x
12
>>> C.x = 99
>>> C.x, b.x
(99, 99)
>>> a.x
45
>>> b.x = 4000
>>> C.x, b.x
(99, 4000)
>>> C.x = -5
>>> C.x, b.x
(-5, 4000)
>>> from polygon import Polygon
>>> poly = Polygon ([Point(0, 0), Point(0, 2), Point(2, 2), Point(2, 0)])
>>> poly.perimeter() # slow
8.0
>>> from rectangle import Rectangle
>>> rect = Rectangle ([Point(0, 0), Point(0, 2), Point(2, 2), Point(2, 0)])
>>> rect.perimeter() # faster
8.0
>>> rect.s1
2.0
>>> poly.s1 # arbitrary polys don't have s1
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'Polygon' object has no attribute 's1'
>>> from stack import Stack
>>> s = Stack()
>>> s.push (2)
>>> s.push(3)
>>> s.is_empty()
False
>>> s.size()
2
>>> s.pop()
3
>>> s.pop()
2
>>> s.pop()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "stack.py", line 10, in pop
    return self.items.pop()
IndexError: pop from empty list
>>>