stack module for py4th

[Nick Seidenman]

Here's the stack module for py4th.

nick

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#!/usr/Util/bin/python
#
# @(#)stack.py 1.1
#
# stack.py
# generic stack class.

class Stack:
def __init__(self):
self.__heap = []

def push (self, word):
self.__heap.append (word)

def pop (self):
if len(self.__heap) == 0:
raise InnerInterpreterError, "stack underflow"

result = self.__heap[-1]
del self.__heap[-1]
return result

def __repr__(self):
return `self.__heap`

def __str__(self):
return `self.__heap`

def flush (self):
self.__heap = []