Python 2.4 (#60, Nov 30 2004, 11:49:19) [MSC v.1310 32 bit (Intel)] on win32
Type "copyright", "credits" or "license()" for more information.

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IDLE 1.1      
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>>> 

Traceback (most recent call last):
  File "C:/Python24/feb15.py", line 9, in -toplevel-
    s.push(1)
TypeError: push() takes exactly 1 argument (2 given)
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>>> 

Traceback (most recent call last):
  File "C:/Python24/feb15.py", line 9, in -toplevel-
    s.push(1)
  File "C:/Python24/feb15.py", line 6, in push
    self.items = item + self.items
TypeError: unsupported operand type(s) for +: 'int' and 'list'
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>>> 
>>> s
<__main__.Stack instance at 0x00B456C0>
>>> print s
<__main__.Stack instance at 0x00B456C0>
>>> str(s)
'<__main__.Stack instance at 0x00B456C0>'
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>>> 
>>> s
<__main__.Stack instance at 0x00B45670>
>>> print s
[1, 3, 4]
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>>> 
>>> print s
[1, 3, 4]
>>> s.top()
1
>>> s.pop()
>>> print s
[3, 4]
>>> s.pop()
>>> prin s
SyntaxError: invalid syntax
>>> print s
[4]
>>> s.top()
4
>>> print s
[4]
>>> s.pop()
>>> print s
[]
>>> s.top()

Traceback (most recent call last):
  File "<pyshell#16>", line 1, in -toplevel-
    s.top()
  File "C:/Python24/feb15.py", line 15, in top
    return self.items[0]
IndexError: list index out of range
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>>> 
>>> s.isEmpty()
False
>>> s.pop()
>>> s.pop()
>>> s.isEmpty()
False
>>> print s
[4]
>>> s.pop()
>>> s.isEmpty()
True
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>>> 
>>> s.pop(
	)
>>> s.pop()
>>> s.pop()
>>> s.pop()
>>> print

s
>>> print s
[]
>>> s.pop()
>>> ================================ RESTART ================================
>>> 
>>> s.pop()
>>> s.pop()
>>> s.pop()
>>> print s
[]
>>> s.pop()
>>> s.top()

Traceback (most recent call last):
  File "<pyshell#37>", line 1, in -toplevel-
    s.top()
  File "C:/Python24/feb15.py", line 20, in top
    raise IndexError
IndexError
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>>> 
>>> s.pop()
>>> s.pop()
>>> s.pop()
>>> s.pop()

Traceback (most recent call last):
  File "<pyshell#41>", line 1, in -toplevel-
    s.pop()
  File "C:/Python24/feb15.py", line 14, in pop
    raise IndexError
IndexError
>>> s.push(4)
>>> print s
[4]
>>> s.push("alkjhfd")
>>> print s
['alkjhfd', 4]
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>>> 
>>> s.push(4)
>>> print s
[4, 1, 3, 4]
>>> s.push("ksdnf")

Traceback (most recent call last):
  File "<pyshell#48>", line 1, in -toplevel-
    s.push("ksdnf")
  File "C:/Python24/feb15.py", line 10, in push
    raise TypeError
TypeError
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>>> 
>>> s.push(4)
>>> s.push("lkshg")

Traceback (most recent call last):
  File "<pyshell#50>", line 1, in -toplevel-
    s.push("lkshg")
  File "C:/Python24/feb15.py", line 10, in push
    raise TypeError
TypeError
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>>> 

Traceback (most recent call last):
  File "C:/Python24/feb15.py", line 63, in -toplevel-
    q.push(8)
  File "C:/Python24/feb15.py", line 40, in push
    self.items = [item] + self.items
TypeError: can only concatenate list (not "NoneType") to list
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>>> 
>>> print q
[10, 8]
>>> q.pop()
>>> print q
[10]
>>> q.push(8)
>>> print q
[8, 10]
>>> q.top()
10
>>> ================================ RESTART ================================
>>> 
>>> node1 = Node(15)
>>> node2 = Node(5)
>>> node3 = Node(25)
>>> node4 = Node(30)
>>> node1.left = node2
>>> node1.right = node3
>>> node3.right = node4
>>> print_tree(node1)
15
5
25
30
>>>