Ft Rest client - fix typing

ft_client/freqtrade_client/ft_rest_client.py

@@ -7,7 +7,7 @@ so it can be used as a standalone script, and can be installed independently.
 
 import json
 import logging
-from typing import Optional
+from typing import Any, Dict, List, Optional, Union
 from urllib.parse import urlencode, urlparse, urlunparse
 
 import requests
@@ -16,6 +16,9 @@ from requests.exceptions import ConnectionError
 
 logger = logging.getLogger("ft_rest_client")
 
+ParamsT = Optional[Dict[str, Any]]
+PostDataT = Optional[Union[Dict[str, Any], List[Dict[str, Any]]]]
+
 
 class FtRestClient:
 
@@ -58,13 +61,13 @@ class FtRestClient:
         except ConnectionError:
             logger.warning("Connection error")
 
-    def _get(self, apipath, params: Optional[dict] = None):
+    def _get(self, apipath, params: ParamsT = None):
         return self._call("GET", apipath, params=params)
 
-    def _delete(self, apipath, params: Optional[dict] = None):
+    def _delete(self, apipath, params: ParamsT = None):
         return self._call("DELETE", apipath, params=params)
 
-    def _post(self, apipath, params: Optional[dict] = None, data: Optional[dict] = None):
+    def _post(self, apipath, params: ParamsT = None, data: PostDataT = None):
         return self._call("POST", apipath, params=params, data=data)
 
     def start(self):