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中文新闻词频分析与趋势词云工具

Project description

WordFreq-CN PyPI PyPI Downloads

中文新闻词频分析与趋势词可视化工具


功能

  • 中文新闻标题/正文的 TF-IDF 高频词提取
  • 词频统计
  • 时间窗口生成趋势词云
  • 支持自定义停用词表,过滤中文虚词
  • 可通过命令行工具 wordfreq-cn 直接运行
  • 也可以通过wordfreq-cnAPI函数使用

安装

# 安装本地源码包(如果你有源码)
pip install .

# 或直接从 PyPI 安装
pip install wordfreq-cn

快速开始示例(命令行)

wordfreq-cn tfidf --news "人工智能技术在医疗领域的应用取得突破" "全球气候变化加剧" --topk 5
wordfreq-cn freq --news "人工智能技术在医疗领域的应用取得突破" --topk 10
wordfreq-cn wordcloud --news "人工智能技术在医疗领域的应用取得突破" "全球气候变化加剧"
wordfreq-cn freq --news "人工智能技术在医疗领域的应用取得突破" --json
wordfreq-cn wordcloud --news "人工智能技术在医疗领域的应用取得突破" "全球气候变化加剧" --bin

示例输出

TF-IDF 高频词:

人工智能技术 1.0000
医疗 0.8349
应用 0.6730
...

词频统计:

技术 2
人工智能 1
医疗 1
...

json输出

{
  "人工智能技术": 1,
  "医疗": 1,
  "应用": 1,
  "突破": 1
}

词云输出目录:

wordclouds/wordcloud_day1.png
wordclouds/wordcloud_day2.png

Python API 使用示例

from collections import defaultdict
from wordfreq_cn import (
    extract_keywords,
    count_word_frequency,
    generate_trend_wordcloud,
    load_stopwords
)

# 示例新闻数据
news_list = [
    ("2025-11-25", "人工智能技术在医疗领域的应用取得突破"),
    ("2025-11-25", "全球气候变化加剧,联合国发布最新报告")
]

# 加载自定义停用词
stopwords = load_stopwords("stopwords.txt")

# ---------------------------
# TF-IDF 关键词提取
# ---------------------------
texts = [text for _, text in news_list]
tfidf_res = extract_keywords(texts, method="tfidf", top_k=5, stopwords=stopwords)
print("TF-IDF:", tfidf_res)

# ---------------------------
# 词频统计
# ---------------------------
counter = count_word_frequency(texts, stopwords=stopwords)
print("词频统计:", counter)

# ---------------------------
# 按日期生成趋势词云
# ---------------------------
news_by_date = defaultdict(list)
for date, text in news_list:
    news_by_date[date].append(text)

generate_trend_wordcloud(news_by_date, stopwords=stopwords) # 生成图片和存放的路径list
# 词云图片默认保存到 wordclouds/ 目录
generate_trend_wordcloud(news_by_date, stopwords=stopwords, return_bytes=True) # 返回二进制byte数据

快速流程图示

                    ┌─────────────┐
                    │ 输入新闻列表 │
                    └──────┬──────┘
                           │
                           ▼
                    ┌─────────────┐
                    │    TF-IDF   │
                    └──────┬──────┘
                           │
                           ▼
                    ┌─────────────┐
                    │  输出关键词  │
                    └──────┬──────┘
                           │
                           ▼
                    ┌─────────────┐
                    │   词频统计   │
                    └──────┬──────┘
                           │
                           ▼
                    ┌─────────────┐
                    │  生成词云图  │
                    └─────────────┘

测试

# 运行所有测试
pytest

# 运行特定测试文件
pytest tests/test_core.py -v

# 运行特定测试类
pytest tests/test_core.py::TestTFIDFKeywords -v

# 带覆盖率报告
pytest --cov=wordfreq_cn

# 生成 HTML 覆盖率报告
pytest --cov=wordfreq_cn --cov-report=html

文件说明

文件名 说明
wordfreq_cn/ Python 包目录,包含核心逻辑和 CLI
wordfreq_cn/data/stopwords.txt 可选自定义停用词文件
wordfreq_cn/data/cn_stopwords.txt 哈工大中文停用词表
wordfreq_cn/data/fonts/ 中文字体文件(如思源黑体)用于生成词云
wordclouds/ 默认存放生成的词云图片
tests/ 单元测试代码

注意事项

  • 新闻量大时,可调整 extract_keywordstop_k 或 TF-IDF 的 max_features 参数
  • 停用词表建议包含常用虚词(如“的”“在”“是”)以获得更干净的词频统计结果
  • 安装后直接使用 wordfreq-cn 命令,无需手动运行 python cli.py

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