如何在保存的html文件中查找字符串的出现次数？

Question

我有一个已保存的html文件，我想从这个文件中找出某个字符串被找到的次数。例如

string= 'Beautiful days'
text = "those beautiful days were unforgettable. I wish every day was a beautiful day"

output expected = 2 (beautiful days, beautiful day)

尝试了以下方法：我试过使用spacy，但无法做到，谁能告诉我这其中的逻辑？

Answer 1

你可以使用 stemmer。它可能是多余的，但它也能找到最接近的词。

import nltk
nltk.download('punkt')

from nltk.stem import PorterStemmer 
from nltk.tokenize import word_tokenize 

ps = PorterStemmer() 

sentence = "those beautiful days were unforgettable. I wish every day was a beautiful day"
words = word_tokenize(sentence) 
sentence = ""
for w in words: 
    sentence += (ps.stem(w.lower()) + " ")
query = 'Beautiful days' 
words = word_tokenize(query) 
query = ""
for w in words: 
    query += (ps.stem(w.lower()) + " ")
print(sentence)
print(query)
print(sentence.count(query))

those beauti day were unforgett . i wish everi day wa a beauti day 
beauti day 
2

Answer 2

您也可以使用。

import re

with open("count_string_in_file.txt") as f:
    html = f.read()

to_match = "beautiful day"
matches = re.findall(to_match, html, re.IGNORECASE)
print(len(matches), matches)
# 2 ['beautiful day', 'beautiful day']

演示