store credit problem resolve

gistfile1.py

#! /usr/bin/env python

import sys, re, os
class Item :
	def __init__(self) :
		self.no = 0
		self.value = 0.0
	def __init__(self, no, value) :
		self.no = no
		self.value = value

	def __str__(self) :
		return "item %d + %d" %(self.no, self.value,)

	def no(self) :
		return self.no

i = Item(10,1)


def load_itens(f) :
	qtd_itens = int(f.readline())
	itens_price = f.readline().split()
	l = []
	for i in range(0, qtd_itens ) :
		l.append(
			Item(i + 1, int(itens_price[i])))
	l = sorted(l, key=lambda item: item.value)
	return l




f = open('A-large-practice.in')

cases = 0
cases = int(f.readline())

for case in range(1, cases + 1) :
	credit = int(f.readline())
	itens = load_itens(f)

	x, y = 0, len(itens) - 1
	while x != y :
		t = itens[x].value + itens[y].value
		if t == credit :
			print "Case #%d: %d %d"%(case, 
				min(itens[x].no, itens[y].no),
				max(itens[x].no, itens[y].no))
			break;
		elif t < credit :
			x += 1
		else :
			y -= 1	
f.close()