写这个程序的时候，我已学习Python将近有一百个小时，在CSDN上看到有人求助使用Python如何写一个自动售饮料的程序，我一想，试试写一个实用的售货程序。当然，只是实现基本功能，欢迎高手指点，新手学习参考。

运行环境：Python 2.7

# encoding=UTF-8
loop=True
money=0
while loop:
    x = raw_input(\'提示：请投入金币,结束投币请按\"q\"键\')
    if x==\'q\':
        if money==0:
            print \'错误：您未投入过纸币，请至少投入一张纸币后才能选购商品\'
        else:
            print \'提示：您已结束投币，将进入购买商品操作界面\'
            loop = False
    else:
        try:
            x = int(x)
            money+=x
            print \'提示：您此次投币\',x,\'元人民币，您一共投币\',money,\'元人民币\'
        except Exception,e:
            print \'错误：您的金币系统不识别，请重新投币，谢谢！\'
 
GoodList = {
    \'可口可乐\':2.5,
    \'果粒橙\':3,
    \'奶茶\':1.5,
    \'加多宝\':4
}
 
i=0
print \'请选择商品：\'
for x in GoodList:
    i+=1
    print \'编号\',i,\'商品名称\',x,\'价格\',GoodList[x]
print
 
fanwei = range(len(GoodList))
loop = True
while loop:
    o = raw_input(\'提示：请输入您要购买的商品编号，按\"q\"键结束购买\')
    if o==\'q\':
        loop = False
    else:
        try:
            o = int(o)
            if o>=1 and o<=len(GoodList):
                i=0
                for x in GoodList:
                    i+=1
                    if i==o:
                        if money>=GoodList[x]:
                            money -= GoodList[x]
                            print \'提示：您购买的商品是:\',x,\'，价格:\',GoodList[x],\'，您还剩余：\',money,\'元人民币\'
                            if money==0:
                                loop = False
                        else:
                            print \'错误：您的余额\',money,\'元已不足购买此商品\',x,\'[\',GoodList[x],\'元]\'
            else:
                print \'错误：您输入的商品编号不存在，请重新输入\'
        except Exception,e:
            print \'错误：请输入正确的产品编号，谢谢合作！\'
 
if money>0:       
    print \'提示：系统将找您，\',money,\'元人民币，欢迎下次光临\'
else:
    print \'提示：您的余额已用完，欢迎下次光临\'