[增强] 读取json文件时，根据参数选择是否自动保存json文件

vnpy/trader/setting.py

@@ -36,7 +36,7 @@ SETTINGS = {
 
 # Load global setting from json file.
 SETTING_FILENAME = "vt_setting.json"
-SETTINGS.update(load_json(SETTING_FILENAME))
+SETTINGS.update(load_json(SETTING_FILENAME, auto_save=False))
 
 
 def get_settings(prefix: str = ""):

vnpy/trader/utility.py

@@ -246,7 +246,7 @@ def get_icon_path(filepath: str, ico_name: str):
     return str(icon_path)
 
 
-def load_json(filename: str):
+def load_json(filename: str, auto_save : bool = True):
     """
     Load data from json file in temp path.
     """
@@ -257,6 +257,7 @@ def load_json(filename: str):
             data = json.load(f)
         return data
     else:
+        if auto_save:
             save_json(filename, {})
         return {}