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我必须创建一个程序，它读取代码行直到一个“。” 输入后，我必须删除标点符号，全部更改为小写，删除停用词和后缀。除了能够删除后缀之外，我已经完成了所有这一切，我已经尝试过 .strip，如您所见，但它只会接受一个参数，实际上并没有从列表元素中删除后缀。任何建议/指针/帮助？谢谢 

stopWords = [ "a", "i", "it", "am", "at", "on", "in", "to", "too", "very", \
          "of", "from", "here", "even", "the", "but", "and", "is", "my", \
          "them", "then", "this", "that", "than", "though", "so", "are" ]

noStemWords = [ "feed", "sages", "yearling", "mass", "make", "sly", "ring" ]


# -------- Replace with your code - e.g. delete line, add your code here ------------

Text = raw_input("Indexer: Type in lines, that finish with a . at start of line only: ").lower()
while Text != ".":
    LineNo = 0 
    x=0
    y=0
    i= 0

#creates new string, cycles through strint Text and removes puctutaiton 
    PuncRemover = ""
    for c in Text:
        if c in ".,:;!?&'":
            c=""
        PuncRemover += c

    SplitWords = PuncRemover.split()

#loops through SplitWords list, removes value at x if found in StopWords list
    while x < len(SplitWords)-1:
        if SplitWords[x] in stopWords:
            del SplitWords[x]
        else:
            x=x+1

    while y < len(SplitWords)-1:
        if SplitWords[y] in noStemWords:
            y=y+1
        else:
            SplitWords[y].strip("ed")
            y=y+1

    Text = raw_input().lower()

print "lines with stopwords removed:" + str(SplitWords)
print Text
print LineNo
print x
print y
print PuncRemover
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1 回答 1

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以下函数应从任何给定字符串中删除后缀。

from itertools import groupby


def removeSuffixs(sentence):

    suffixList = ["ing", "ation"] #add more as nessecary

    for item in suffixList:
        if item in sentence:

            sentence = sentence.replace(item, "")
            repeatLetters = next((True for char, group in groupby(sentence)
                                  if sum(1 for _ in group) >= 2), False)

            if repeatLetters:

                sentence = sentence[:-1]

    return sentence

例子：

print(removeSuffixs("climbing running")) # 'climb run'
print(removeSuffixs("summation")) # 'sum'

在您的代码中，替换SplitWords[y].strip("ed") 为，

SplitWords[y] = removeSuffixs(SplitWords[y])

于 2016-12-01T19:07:26.603 回答