diff --git a/clients/python/wcferry/client.py b/clients/python/wcferry/client.py
index 63daf92..d2b47d4 100644
--- a/clients/python/wcferry/client.py
+++ b/clients/python/wcferry/client.py
@@ -13,7 +13,7 @@ import sys
 from queue import Queue
 from threading import Thread
 from time import sleep
-from typing import Callable, List, Optional
+from typing import Callable, Dict, List, Optional
 
 import pynng
 import requests
@@ -161,7 +161,7 @@ class Wcf():
 
         return rsp.str
 
-    def get_msg_types(self) -> dict:
+    def get_msg_types(self) -> Dict:
         """获取所有消息类型"""
         req = wcf_pb2.Request()
         req.func = wcf_pb2.FUNC_GET_MSG_TYPES  # FUNC_GET_MSG_TYPES
@@ -171,7 +171,7 @@ class Wcf():
 
         return dict(sorted(dict(types).items()))
 
-    def get_contacts(self) -> List[dict]:
+    def get_contacts(self) -> List[Dict]:
         """获取完整通讯录"""
         req = wcf_pb2.Request()
         req.func = wcf_pb2.FUNC_GET_CONTACTS  # FUNC_GET_CONTACTS
@@ -208,14 +208,14 @@ class Wcf():
 
         return dbs
 
-    def get_tables(self, db: str) -> List[dict]:
+    def get_tables(self, db: str) -> List[Dict]:
         """获取 db 中所有表
 
         Args:
             db (str): 数据库名（可通过 `get_dbs` 查询）
 
         Returns:
-            List[dict]: `db` 下的所有表名及对应建表语句
+            List[Dict]: `db` 下的所有表名及对应建表语句
         """
         req = wcf_pb2.Request()
         req.func = wcf_pb2.FUNC_GET_DB_TABLES  # FUNC_GET_DB_TABLES
@@ -225,7 +225,7 @@ class Wcf():
 
         return tables
 
-    def get_user_info(self) -> dict:
+    def get_user_info(self) -> Dict:
         """获取登录账号个人信息"""
         req = wcf_pb2.Request()
         req.func = wcf_pb2.FUNC_GET_USER_INFO  # FUNC_GET_USER_INFO
@@ -482,7 +482,7 @@ class Wcf():
 
         return rsp.status
 
-    def query_sql(self, db: str, sql: str) -> List[dict]:
+    def query_sql(self, db: str, sql: str) -> List[Dict]:
         """执行 SQL，如果数据量大注意分页，以免 OOM
 
         Args:
@@ -490,7 +490,7 @@ class Wcf():
             sql (str): 要执行的 SQL
 
         Returns:
-            List[dict]: 查询结果
+            List[Dict]: 查询结果
         """
         result = []
         req = wcf_pb2.Request()
@@ -526,7 +526,7 @@ class Wcf():
         rsp = self._send_request(req)
         return rsp.status
 
-    def get_friends(self) -> List[dict]:
+    def get_friends(self) -> List[Dict]:
         """获取好友列表"""
         not_friends = {
             "fmessage": "朋友推荐消息",
@@ -538,9 +538,9 @@ class Wcf():
         friends = []
         for cnt in self.get_contacts():
             if (cnt["wxid"].endswith("@chatroom") or    # 群聊
-                cnt["wxid"].startswith("gh_") or        # 公众号
-                cnt["wxid"] in not_friends.keys()       # 其他杂号
-                ):
+                    cnt["wxid"].startswith("gh_") or    # 公众号
+                    cnt["wxid"] in not_friends.keys()   # 其他杂号
+                    ):
                 continue
             friends.append(cnt)
 
@@ -631,33 +631,32 @@ class Wcf():
         rsp = self._send_request(req)
         return rsp.status
 
-    def get_chatroom_members(self, roomid: str) -> List[dict]:
+    def get_chatroom_members(self, roomid: str) -> Dict:
         """获取群成员
 
         Args:
             roomid (str): 群的 id
 
         Returns:
-            List[dict]: 群成员列表: [{wxid: 昵称}, ...]
+            Dict: 群成员列表: {wxid1: 昵称1, wxid2: 昵称2, ...}
         """
-        pass
+        members = {}
         contacts = self.query_sql("MicroMsg.db", "SELECT UserName, NickName FROM Contact;")
         contacts = {contact["UserName"]: contact["NickName"]for contact in contacts}
-        crs = self.query_sql("MicroMsg.db", f"SELECT RoomData FROM ChatRoom WHERE ChatRoomName = '{roomid}'")
+        crs = self.query_sql("MicroMsg.db", f"SELECT RoomData FROM ChatRoom WHERE ChatRoomName = '{roomid}';")
         if not crs:
-            return []
+            return members
 
         bs = crs[0].get("RoomData")
         if not bs:
-            return []
+            return members
 
         crd = RoomData()
         crd.ParseFromString(bs)
         if not bs:
-            return []
+            return members
 
-        names = {}
         for member in crd.members:
-            names[member.wxid] = member.name if member.name else contacts.get(member.wxid, "")
+            members[member.wxid] = member.name if member.name else contacts.get(member.wxid, "")
 
-        return names
+        return members