diff --git a/getcids.py b/getcids.py
new file mode 100644
index 0000000..ab5ef40
--- /dev/null
+++ b/getcids.py
@@ -0,0 +1,34 @@
+import requests
+import re
+
+def get_cid(urls):
+    headers = {
+        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36'
+    }
+
+    str = " "
+
+    for ur in urls:
+        #对每个视频发送request,得到返回数据存于resp中
+        url = f"https://www.ibilibili.com/video/{ur}/"
+        resp = requests.get(url, headers=headers)
+        resp.encoding = "utf-8"
+        #将返回的页面源代码存储于str中
+        str += resp.text
+
+    #再利用正则表达式得到每个视频的cid
+    obj = re.compile(r'oid=(\d+)', re.S)
+    list1 = obj.findall(str)
+    cidlist = [int(item) for item in list(set(list1))]
+    #返回cid列表
+    return cidlist
+
+
+
+# path = Path('cid.json')
+# contents = json.dumps(cidist)
+# path.write_text((contents))
+
+
+# print(len(urlist))
+# print(urlist)
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