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reverse_list.py
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56 lines (49 loc) · 1.31 KB
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#!/usr/bin/env python
#-*- coding: utf-8 -*-
class Node(object):
def __init__(self, data, p=0):
self.data = data
self.next = p
class Reverse(object):
def __init__(self):
self.head = 0
def initlist(self):
print "input numbers here. '!' to quit"
try:
data = raw_input()
if data is not '!':
self.head = Node(int(data))
p = self.head
while data != '!':
data = raw_input()
if data == '!':
break
else:
p.next = Node(int(data))
p = p.next
except ValueError:
print "input error!"
finally:z
print "end"
def rever(self):
self.initlist()
p = self.head
nex = self.head.next
pre = Node(0)
while self.head.next != 0:
nex = self.head.next
self.head.next = pre
pre = self.head
self.head = nex
self.head.next = pre
pre = self.head
#debug
print "reverse\t",
while pre.next != 0:
print pre.data,
pre = pre.next
if __name__ == '__main__':
# test data
# data = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15]
l = Reverse()
l.rever()