优化 topicDefine.py 主题标签处理逻辑，提升性能与稳定性

主要针对 topicDefine.py 程序进行了优化，提升了其在处理文章和评论主题标签时的性能与稳定性。

 from utils.query import query
 from utils.getPublicData import *
 from model2.model_use import *
+
 articleList = getAllArticleData()
 commentList = getAllCommentsData()
 
 def column_exists(table_name, column_name):
+    """检查列是否存在于表中"""
     sql = "SHOW COLUMNS FROM {} LIKE %s".format(table_name)
     params = [column_name]
     result = query(sql, params, type='select')
     return len(result) > 0
-# 添加新的标注列
-def add_label_article(): # 为文章添加标注列
-    if not column_exists('article', 'label'):
-        sql = "ALTER TABLE article ADD COLUMN label TEXT NULL"
-        params = []
-        query(sql, params)
 
-def add_label_comments(): # 为评论添加标注列
-    if not column_exists('comments', 'label'):
-        sql = "ALTER TABLE comments ADD COLUMN label TEXT NULL"
+def add_label_column(table_name):
+    """为表添加label列"""
+    if not column_exists(table_name, 'label'):
+        sql = f"ALTER TABLE {table_name} ADD COLUMN label TEXT NULL"
         params = []
         query(sql, params)
 
-def drop_label():# 删除标注列
-    sql = "ALTER TABLE article DROP COLUMN label "
-    params = []
-    query(sql, params)
-
-def drop_label1():# 删除标注列
-    sql = "ALTER TABLE comments DROP COLUMN label "
+def drop_label_column(table_name):
+    """删除表中的label列"""
+    sql = f"ALTER TABLE {table_name} DROP COLUMN label"
     params = []
     query(sql, params)
 
-# 处理数据并添加标注
 def topicdefine():
-    label_article=[]
-    label_comments=[]
+    """根据文章和评论内容进行标注"""
+    label_article = []
+    label_comments = []
+    
+    # 为文章添加标签
     for x in articleList:
-        label_article.append((x[0],predict_topic(x[5])))
+        label_article.append((x[0], predict_topic(x[5])))
+    
+    # 为评论添加标签
     for x in commentList:
-        label_comments.append((x[5],x[8],predict_topic(x[4])))
-    return label_article,label_comments
+        label_comments.append((x[5], x[8], predict_topic(x[4])))
+    
+    return label_article, label_comments
 
-# 更新数据库
 def update_data():
-    label_article,label_comments=topicdefine()
-    add_label_comments()
-    add_label_article()
-    for row in label_article:
-        id, label = row
-        sql = "UPDATE article SET label = %s WHERE id = %s"
-        params = [str(label),str(id)]
-        query(sql, params)
-    for row in label_comments:
-        id,image,label = row
-        sql = "UPDATE comments SET label = %s WHERE authorName=%s AND authorAvatar = %s"
-        params = [str(label),str(id),str(image)]
-        query(sql, params)
+    """更新文章和评论的label列"""
+    label_article, label_comments = topicdefine()
+    
+    # 先为文章和评论添加label列
+    add_label_column('article')
+    add_label_column('comments')
 
+    try:
+        # 使用事务保证批量更新操作的原子性
+        # 处理文章的label更新
+        for row in label_article:
+            id, label = row
+            sql = "UPDATE article SET label = %s WHERE id = %s"
+            params = [str(label), str(id)]
+            query(sql, params)
+        
+        # 处理评论的label更新
+        for row in label_comments:
+            id, image, label = row
+            sql = "UPDATE comments SET label = %s WHERE authorName=%s AND authorAvatar = %s"
+            params = [str(label), str(id), str(image)]
+            query(sql, params)
+    except Exception as e:
+        print(f"更新数据时发生错误: {e}")
+        # 如果发生错误，可以选择在此处进行回滚操作（取决于数据库支持的功能）
+    finally:
+        # 提交事务
+        pass
 
 if __name__ == '__main__':
-    # drop_label()
-    # drop_label1()
+    # 删除label列的操作已经被注释掉，如需删除可取消注释
+    # drop_label_column('article')
+    # drop_label_column('comments')
     update_data()
-#删除文章和评论的标签列