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"""
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生成基于全部弹幕数据的词云图，并进行关键词提取和归一化处理
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"""
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import re
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import pandas as pd
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import numpy as np
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import wordcloud
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from matplotlib.image import imread
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from jieba import analyse
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from concurrent.futures import ThreadPoolExecutor
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def blue_color_func(_, __, ___, ____, _random_state=None, **_kwargs):
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"""定义蓝色调色板，用于词云图的颜色设置"""
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return f"hsl(210, 100%, {np.random.randint(50, 90)}%)"
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def normalize_hahaha(text):
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"""归一化处理，将所有类似的“哈哈哈”统一为“哈哈哈”"""
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return re.sub(r'哈{3,}', '哈哈哈', text)
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def process_keywords(dm_list):
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"""并行处理关键词提取"""
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dm_string = ' '.join(dm_list)
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with ThreadPoolExecutor() as executor:
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keywords = list(executor.map(lambda kw: analyse.extract_tags(kw, topK=100, withWeight=False, allowPOS=()), [dm_string]))
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return ' '.join(keywords[0])
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def wordcloud_generation(danmu_data, stopwords, output_path):
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"""生成词云图并保存"""
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dm_list = danmu_data['danmu'].dropna().astype(str).tolist()
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dm_list = [normalize_hahaha(text) for text in dm_list]
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dmreal_string = process_keywords(dm_list)
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img = imread("/output/OIP.jpg")
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wc = wordcloud.WordCloud(
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stopwords=stopwords,
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width=1920,
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height=1200,
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background_color='white',
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font_path='msyhl.ttc',
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mask=img,
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max_words=100,
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color_func=blue_color_func,
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).generate(dmreal_string)
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wc.to_file(output_path)
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def main():
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"""加载数据并生成词云"""
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dm = pd.read_excel('E:/Crawler/output/All_Danmu.xlsx', sheet_name='Sheet1')
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stopwords = {'我', '你', '他', '这', '个', '是', '的', '了', '啊', '吗', '吧', '就', '都', '不', '也', '哈哈哈'}
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wordcloud_generation(dm, stopwords, '/output/alldanmu_dwordcloud.png')
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if __name__ == '__main__':
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main()
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