LearnPython笔记:ex48 代码

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