add requirements.txt and modify xService package format

assets/configs/requirements.txt

@@ -0,0 +1,3 @@
+loguru==0.7.2
+paramiko==3.5.0
+pymodbus==3.7.2

code/openapi.py

@@ -600,7 +600,7 @@ class HmiRequest(object):
 
     @staticmethod
     def __package_xs(cmd):
-        return f"{dumps(cmd, separators=(",", ":"))}\r".encode()
+        return "".join([dumps(cmd, separators=(",", ":")), "\r"]).encode()
 
     def __unpackage(self, sock):
         def to_read(conn, mask):
@@ -1757,7 +1757,7 @@ class HmiRequest(object):
         :return: None
         """
         origin_code_list = self.get_filtered_error_code["g"]["log_code.data"]["code_list"]
-        # [{'id': 10000, 'title': 'HMI请求包解析错误'}, {'id': 10002, 'title': '快速调整启动失败'}]
+        # [{"id": 10000, "title": "HMI请求包解析错误"}, {"id": 10002, "title": "快速调整启动失败"}]
         if action == "clear":
             code_list = []
         elif action == "add":