li = ['手机','电脑','鼠标垫','键盘','鼠标'] print('欢迎光临!') dic = {} for x in li: print('{}\t{}'.format(li.index(x),x)) dic.setdefault(li.index(x),x) while 1: num = input('>>>/输入Q退出') if num.upper() == 'Q': break if num.isdigit(): num = int(num) if num >= 0 and num < len(li): print(dic.get(num,None)) break else:print('请输入有效的序号!') else: print('输入的不是商品序号,请重新输入!') continue
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转载自www.cnblogs.com/chengoudan/p/10389729.html
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