def content_cluster(df, df_save=False):
"""按新闻内容聚类"""
df_content = df.copy()
df_content = content_preprocess(df_content)
word_library_list = counter.get_word_library(df_content['content_cut'])
single_frequency_words_list = counter.get_single_frequency_words(df_content['content_cut'])
max_features = len(word_library_list) - len(single_frequency_words_list) // 2
content_matrix = modeling.feature_extraction(df_content['content_'], vectorizer='CountVectorizer',
vec_args={'max_df': 0.95, 'min_df': 1, 'max_features': max_features})
content_dbscan = modeling.get_cluster(content_matrix, cluster='DBSCAN',
cluster_args={'eps': 0.35, 'min_samples': 4, 'metric': 'cosine'})
content_labels = modeling.get_labels(content_dbscan)
df_content['content_label'] = content_labels
df_non_outliers = modeling.get_non_outliers_data(df_content, label_column='content_label')
content_label_num = counter.get_num_of_value_no_repeat(df_non_outliers['content_label'].tolist())
print('按新闻内容聚类，一共有%d个簇(不包括离群点)' % content_label_num)
content_rank = modeling.label2rank(content_labels)
df_content['content_rank'] = content_rank
for i in range(1, content_label_num + 1):
df_ = df_content[df_content['content_rank'] == i]
content_top_list = counter.get_most_common_words(df_['content_cut'], top_n=15, min_frequency=1)
print(content_top_list)
if df_save:
df_content.drop(['content_', 'content_label'], axis=1, inplace=True)
news_crawler.save_news(df_content, os.path.join(results_path, 'df_content_rank.csv'))
return df_content
def title_cluster(df, save_df=False):
"""按新闻标题聚类"""
df_title = df.copy()
df_title = title_preprocess(df_title)
word_library_list = counter.get_word_library(df_title['title_cut'])
single_frequency_words_list = counter.get_single_frequency_words(df_title['title_cut'])
max_features = len(word_library_list) - len(single_frequency_words_list) // 2
title_matrix = modeling.feature_extraction(df_title['title_'], vectorizer='CountVectorizer',
vec_args={'max_df': 1.0, 'min_df': 1, 'max_features': max_features})
title_dbscan = modeling.get_cluster(title_matrix, cluster='DBSCAN',
cluster_args={'eps': 0.4, 'min_samples': 4, 'metric': 'cosine'})
title_labels = modeling.get_labels(title_dbscan)
df_title['title_label'] = title_labels
df_non_outliers = modeling.get_non_outliers_data(df_title, label_column='title_label')
title_label_num = counter.get_num_of_value_no_repeat(df_non_outliers['title_label'].tolist())
print('按新闻标题聚类，一共有%d个簇(不包括离群点)' % title_label_num)
title_rank = modeling.label2rank(title_labels)
df_title['title_rank'] = title_rank
for i in range(1, title_label_num + 1):
df_ = df_title[df_title['title_rank'] == i]
title_top_list = counter.get_most_common_words(df_['title_cut'], top_n=10)
print(title_top_list)
if save_df:
df_title.drop(['content', 'title_', 'title_label'], axis=1, inplace=True)
news_crawler.save_news(df_title, os.path.join(results_path, 'df_title_rank.csv'))
return df_title
def cluster_content():
eps_var = Entry_Eps.get()
min_samples_var = Entry_MinSamples.get()
if eps_var == '' or min_samples_var == '':
messagebox.showinfo('Message', '请输全聚类参数！')
return
eps_var = float(eps_var)
min_samples_var = int(min_samples_var)
try:
df = news_pandas.load_news(os.path.join(temp_news_path,
'news_cut.csv'))
df['content_cut'] = df['content_cut'].map(eval)
df['content_'] = df['content_'].map(str)
except FileNotFoundError:
messagebox.showinfo('Message', '请先对新闻内容文本进行预处理！')
return
word_library_list = counter.get_word_library(df['content_cut'])
single_frequency_words_list = counter.get_single_frequency_words(
df['content_cut'])
max_features = len(
word_library_list) - len(single_frequency_words_list) // 2
matrix = modeling.feature_extraction(df['content_'],
vectorizer='TfidfVectorizer',
vec_args={
'max_df': 0.95,
'min_df': 1,
'max_features': max_features
})
dbscan = modeling.get_cluster(matrix,
cluster='DBSCAN',
cluster_args={
'eps': eps_var,
'min_samples': min_samples_var,
'metric': 'cosine'
})
labels = modeling.get_labels(dbscan)
df['label'] = labels
ranks = modeling.label2rank(labels)
df['rank'] = ranks
news_pandas.save_news(df, os.path.join(results_path, 'news_label.csv'))
df['matrix'] = matrix.toarray().tolist()
df_non_outliers = df[df['label'] != -1].copy()
if df_non_outliers.shape[0] == 0:
messagebox.showinfo('Message', '不能聚类出任何热点，请重新设置聚类参数！')
return
data_pca_tsne = modeling.feature_reduction(
df_non_outliers['matrix'].tolist(),
pca_n_components=3,
tsne_n_components=2)
df_non_outliers['pca_tsne'] = data_pca_tsne.tolist()
del df_non_outliers['matrix']
news_pandas.save_news(df_non_outliers,
os.path.join(results_path, 'news_non_outliers.csv'))
rank_num = counter.get_num_of_value_no_repeat(df_non_outliers['rank'])
hot_num.set(rank_num)
messagebox.showinfo('Message', '按照新闻内容聚类完成！')