刪除python中列表元素的後綴

-1

我必須創建一個程序，它讀取代碼行，直到單個「。」。被輸入，我必須刪除標點符號，全部更改爲小寫字母，刪除停用詞和後綴。除了能夠刪除後綴外，我已經管理了所有這些，我試過.strip，因爲您可以看到它，但它只接受一個參數，並且實際上並未從列表元素中刪除後綴。任何建議/指針/幫助？由於刪除python中列表元素的後綴

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

來源

2016-12-01 Rydooo

您正在閱讀的只是曾經在這裏，看看'raw_input'約 – martianwars

有兩件事情代碼風格第一。你應該看看[Python命名約定]（https://www.python.org/dev/peps/pep-0008/#naming-conventions）。大寫的單詞通常保留給類或類型變量。此外，你的'while'循環應該是'for'循環，因爲你知道你要執行多少次迭代。至於你的問題，你需要實際分配正在改變的列表元素。對於剝離字符序列，請參閱[這個問題]（http://stackoverflow.com/questions/3900054/python-strip-multiple-characters） – danielunderwood

讀入行是爲了添加到字典，這是爲什麼現在它只能讀取一次。 – Rydooo

下面的函數應該從任何特定的字符串中刪除後綴。

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'

在代碼中，替換SplitWords[y].strip("ed") 用，

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

來源

2016-12-01 19:07:26

刪除python中列表元素的後綴

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