补充异常信息和代码注释

main.py

@@ -6,7 +6,7 @@ from PIL import Image
 import io
 
 
-def get_html(url, max_retries=3):
+def get_html(url, file_name, max_retries=3):
     session = requests.Session()
     adapter = requests.adapters.HTTPAdapter(max_retries=max_retries)
     session.mount("http://", adapter)
@@ -18,7 +18,7 @@ def get_html(url, max_retries=3):
         return response.text
     except Exception as e:
         print(f"Error occurred while fetching HTML from {url}: {e}")
-        raise Exception("获取网页html失败")
+        raise Exception(f"{file_name}, 获取网页html失败")
 
 
 def download_image(img_url, max_retries=5):
@@ -70,6 +70,9 @@ def set_img_obj_data(img_obj):
 
 
 def concatenate_images_vertically(img_obj_list, output_file):
+    """
+    垂直拼接图片,并保存到本地目录
+    """
     try:
         # 计算拼接后的长图宽度和总高度
         max_width = max(
@@ -106,7 +109,7 @@ def process_batch(lines):
         if line:
             # 解析出 HTML 文件名和 URL 地址
             file_name, _, url = line.partition(" - ")
-            html_content = get_html(url)
+            html_content = get_html(url, file_name)
             img_url_list = get_img_urls(html_content)
             img_obj_list = create_img_obj_list(img_url_list, file_name)