实现文本文件“corpus.txt”内容的读取,结合jieba实现关键词提取(top20),并对提取的关键词进行向量化: 要求: 1. 使用jieba库 2. 使用sk-learn库 3. 需要加载停用词表“stopword.txt”
时间: 2024-10-15 16:20:44 浏览: 41
要实现这个功能,你可以按照以下步骤操作:
1. **安装依赖库**:
- 如果还没有安装`jieba`,可以使用`pip install jieba`。
- 对于文本处理和向量化,需要`sklearn`,已经包含了`TfidfVectorizer`等工具,如果你还没安装,可以运行`pip install scikit-learn`。
2. **读取文件内容**:
```python
with open('corpus.txt', 'r', encoding='utf-8') as file:
text_content = file.read()
```
3. **关键词提取(使用jieba)**:
```python
import jieba.analyse
stop_words = set() # 加载停用词表
with open('stopword.txt', 'r', encoding='utf-8') as stopwords_file:
for word in stopwords_file:
stop_words.add(word.strip())
keywords = jieba.analyse.extract_tags(text_content, topK=20, withWeight=True, stop_words=stop_words)
```
4. **转换关键词到向量(使用sk-learn)**:
```python
from sklearn.feature_extraction.text import TfidfVectorizer
vectorizer = TfidfVectorizer()
keyword_vectors = vectorizer.fit_transform([' '.join(keyword[0] for keyword in keywords)])
```
5. **查看结果**:
可能会得到一个稀疏矩阵,代表每个关键词的重要程度,你可以通过索引来获取每个关键词及其对应的TF-IDF值。
```python
print(vectorizer.get_feature_names_out()) # 输出关键词列表
print(keyword_vectors.toarray()) # 输出关键词向量
```
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