赶紧写上 ，一定有人着急要看，啊哈哈哈哈，嘻嘻 哈哈
不枉我起了个大早
利用什么碎片时间啊，真正能深入学习的，是需要大段大段不被打断的时间
1. 完全实现了如下几种输入数据；
2. 遗留：最后一个elif，而不是else，不知道咋写，先庆功；
directions = ('north', 'south', 'east', 'west', 'down', 'up', 'left', 'right', 'back')
verbs = ('go', 'stop', 'kill', 'eat', 'open')
stop_words = ('the', 'in', 'of', 'from', 'at', 'it','the', 'The', 'tHe', 'thE')
nouns = ('door', 'bear', 'princess', 'cabinet')def scan(sentence):a= sentence.split()direction = ('direction')verb = ('verb')stop = ('stop')noun = ('noun')stop = ('stop')senten = []for x in a:if x in directions:senten.append((direction,x))elif x in verbs:senten.append((verb,x))elif x in stop_words:senten.append((stop,x))elif x in nouns:senten.append((noun, x))elif x.isupper():senten.append(('error',x))elif x not in (directions, stop_words, nouns):try:senten.append(('number', int(x)))except ValueError:senten.append(('error', x))return senten
