给出步骤1,2,3的具体Python实现
时间: 2024-10-02 15:03:34 浏览: 5
对于基于RAG的私有知识库中PDF文件的处理,以下是三个步骤的具体Python实现:
**步骤1:PDF解析(PyPDF2示例)**
```python
import PyPDF2
def extract_text_from_pdf(pdf_file):
with open(pdf_file, 'rb') as file:
pdf_reader = PyPDF2.PdfFileReader(file)
text = ''
for page_num in range(pdf_reader.numPages):
page = pdf_reader.getPage(page_num)
text += page.extractText()
return text
# 使用函数
pdf_content = extract_text_from_pdf('path_to_your_pdf.pdf')
```
**步骤2:结构化数据提取(NLTK或spaCy示例)**
```python
from nltk import word_tokenize, pos_tag
import spacy
nlp = spacy.load('en_core_web_sm')
def extract_keywords_and_entities(text):
doc = nlp(text)
keywords = [token.text for token in doc if token.is_stop != True]
entities = [(ent.text, ent.label_) for ent in doc.ents]
return keywords, entities
# 示例
keywords, entities = extract_keywords_and_entities(pdf_content)
```
**步骤3:整合至知识库(SQLite示例)**
```python
import sqlite3
def insert_into_db(conn, table_name, data):
cursor = conn.cursor()
query = f"INSERT INTO {table_name} VALUES (?, ?)"
cursor.execute(query, (data['keyword'], data['content']))
conn.commit()
# 假设我们有一个名为'text_data'的表,有keyword和text_content两列
conn = sqlite3.connect('knowledge_base.db')
insert_into_db(conn, 'text_data', {'keyword': '...', 'content': pdf_content})
conn.close()
```
以上就是处理PDF文件的三个基本步骤的Python实现。实际应用中可能还需根据具体需求调整和优化。