词形化 txt 文件并仅替换词形化的单词

Question

无法弄清楚如何对 txt 文件中的单词进行词形还原。我已经列出了这些词，但我不知道事后如何对它们进行词形还原。

这是我所拥有的：

import nltk, re
nltk.download('wordnet')
from nltk.stem.wordnet import WordNetLemmatizer

def lemfile():
    f = open('1865-Lincoln.txt', 'r')
    text = f.read().lower()
    f.close()
    text = re.sub('[^a-z\ \']+', " ", text)
    words = list(text.split())

Answer 1

Lemmatizing txt 文件并仅替换词形化的单词可以作为 --`

import nltk
from nltk.corpus import stopwords
from nltk.stem import PorterStemmer
from nltk.tokenize import word_tokenize
from nltk.stem import WordNetLemmatizer
from pywsd.utils import lemmatize_sentence

lmm = WordNetLemmatizer()
ps = PorterStemmer()

new_data= []

with open('/home/rahul/Desktop/align.txt','r') as f:
f1 = f.read()
f2 = f1.split()
en_stops = set(stopwords.words('english'))
hu_stops = set(stopwords.words('hungarian'))

all_words = f2 
punctuations = '''!()-[]{};:'"\,<>./?@#$%^&*_~[<p>]'''
#if lemmatization of one string is required then uncomment below line
#data='this is coming rahul  schooling met happiness making'
print ()
for line in all_words:
    new_data=' '.join(lemmatize_sentence(line))
    print (new_data)

---

PS- 根据您的需要进行识别。 希望这会有所帮助！！！

Answer 2

您还可以尝试在 pywsd 包中围绕 NLTK 的WordNetLemmatizer 进行包装，具体来说，https://github.com/alvations/pywsd/blob/master/pywsd/utils.py#L129

安装：

pip install -U nltk
python -m nltk.downloader popular
pip install -U pywsd

代码：

>>> from pywsd.utils import lemmatize_sentence
>>> lemmatize_sentence('These are foo bar sentences.')
['these', 'be', 'foo', 'bar', 'sentence', '.']
>>> lemmatize_sentence('These are foo bar sentences running.')
['these', 'be', 'foo', 'bar', 'sentence', 'run', '.']

特别针对您的问题：

from __future__ import print_function
from pywsd.util import lemmatize_sentence 

with open('file.txt') as fin, open('outputfile.txt', 'w') as fout
    for line in fin:
        print(' '.join(lemmatize_sentence(line.strip()), file=fout, end='\n')

Answer 3

初始化一个WordNetLemmatizer 对象，并对行中的每个单词进行词形还原。您可以使用 fileinput 模块执行就地文件 I/O。

# https://stackoverflow.com/a/5463419/4909087
import fileinput

lemmatizer = WordNetLemmatizer()
for line in fileinput.input('1865-Lincoln.txt', inplace=True, backup='.bak'):
    line = ' '.join(
        [lemmatizer.lemmatize(w) for w in line.rstrip().split()]
    )
    # overwrites current `line` in file
    print(line)

fileinput.input 在使用时将标准输出重定向到打开的文件。