删除python中的单词扩展名
我有一篇有几个单词的课文。我想删除单词的所有派生扩展。例如,我想删除扩展名-ed-ing并保留初始动词。如果我使用了Verification或verified来保持Verification f.e.,我在python中找到了一个方法strip,它从字符串的开头或结尾删除了一个特定的字符串,但这并不是我想要的。例如,有没有在python中实现这种功能的库 我试着执行建议帖子中的代码,我注意到几个词中有一个奇怪的修饰。例如,我有下面的文本删除python中的单词扩展名,python,string,Python,String,我有一篇有几个单词的课文。我想删除单词的所有派生扩展。例如,我想删除扩展名-ed-ing并保留初始动词。如果我使用了Verification或verified来保持Verification f.e.,我在python中找到了一个方法strip,它从字符串的开头或结尾删除了一个特定的字符串,但这并不是我想要的。例如,有没有在python中实现这种功能的库 我试着执行建议帖子中的代码,我注意到几个词中有一个奇怪的修饰。例如,我有下面的文本 We goin all the way βπƒβ΅οΈβ΅
We goin all the way βπƒβ΅οΈβ΅οΈ
Think ive caught on to a really good song ! Im writing π
Lookin back on the stuff i did when i was lil makes me laughh π‚
I sneezed on the beat and the beat got sicka
#nashnewvideo http://t.co/10cbUQswHR
Homee βοΈβοΈβοΈπ΄
So much respect for this man , truly amazing guy βοΈ @edsheeran
http://t.co/DGxvXpo1OM"
What a day ..
RT @edsheeran: Having some food with @ShawnMendes
#VoiceSave christina π
Im gunna make the βοΈ sign my signature pose
You all are so beautiful .. π soooo beautiful
Thought that was a really awesome quote
Beautiful things don't ask for attention"""
在使用以下代码之后(我还删除了非拉丁字符和URL)
例如,它对beauti来说是美丽的,对realli来说是真实的。我的代码如下:
reader = csv.reader(f)
print doc
for row in reader:
text = re.sub(r"(?:\@|https?\://)\S+", "", row[2])
filter(lambda x: x in string.printable, text)
out = text.translate(string.maketrans("",""), string.punctuation)
out = re.sub("[\W\d]", " ", out.strip())
word_list = out.split()
str1 = ""
for verb in word_list:
verb = verb.lower()
verb = nltk.stem.porter.PorterStemmer().stem_word(verb)
str1 = str1+" "+verb+" "
list.append(str1)
str1 = "\n"
相反,您可以使用
lemmatizer
。下面是python NLTK的一个示例:
from nltk.stem import WordNetLemmatizer
s = """
You all are so beautiful soooo beautiful
Thought that was a really awesome quote
Beautiful things don't ask for attention
"""
wnl = WordNetLemmatizer()
print " ".join([wnl.lemmatize(i) for i in s.split()]) #You all are so beautiful soooo beautiful Thought that wa a really awesome quote Beautiful thing don't ask for attention
在某些情况下,它可能无法实现您的期望:
print wnl.lemmatize('going') #going
然后您可以将这两种方法结合起来:
词干分析
和柠檬化
您的问题有点笼统,但是如果您已经定义了静态文本,最好的方法是编写自己的词干分析器
。因为Porter
和Lancaster
词干分析器遵循自己的规则来剥离词缀,而WordNet lemmatizer
仅在生成的单词在其词典中时删除词缀
你可以这样写:
import re
def stem(word):
for suffix in ['ing', 'ly', 'ed', 'ious', 'ies', 'ive', 'es', 's', 'ment']:
if word.endswith(suffix):
return word[:-len(suffix)]
return word
def stemmer(phrase):
for word in phrase:
if stem(word):
print re.findall(r'^(.*)(ing|ly|ed|ious|ies|ive|es|s|ment)$', word)
因此,对于“处理过程”,您将有:
>> stemmer('processing processes')
[('process', 'ing'),('process', 'es')]
是的,stem是我要找的词。我试过这篇文章的例子,但我注意到一个严重的词修剪。我在lemmatizer上得到了以下结果:你们都很漂亮,所以我觉得这是一个非常棒的引语,美丽的东西,不需要注意,首先使用lemmatization,然后使用词干是明智的吗?
>> stemmer('processing processes')
[('process', 'ing'),('process', 'es')]