Traceback (most recent call last):
File "c:\vnstudio\lib\site-packages\vnpy\app\cta_strategy\ui\widget.py", line 268, in stop_strategy
self.cta_engine.stop_strategy(self.strategy_name)
File "c:\vnstudio\lib\site-packages\vnpy\app\cta_strategy\engine.py", line 738, in stop_strategy
self.sync_strategy_data(strategy)
File "c:\vnstudio\lib\site-packages\vnpy\app\cta_strategy\engine.py", line 834, in sync_strategy_data
save_json(self.data_filename, self.strategy_data)
File "c:\vnstudio\lib\site-packages\vnpy\trader\utility.py", line 116, in save_json
ensure_ascii=False
File "c:\vnstudio\lib\json__init.py", line 179, in dump
for chunk in iterable:
File "c:\vnstudio\lib\json\encoder.py", line 431, in _iterencode
yield from _iterencode_dict(o, _current_indent_level)
File "c:\vnstudio\lib\json\encoder.py", line 405, in _iterencode_dict
yield from chunks
File "c:\vnstudio\lib\json\encoder.py", line 405, in _iterencode_dict
yield from chunks
File "c:\vnstudio\lib\json\encoder.py", line 438, in _iterencode
o = _default(o)
File "c:\vnstudio\lib\json\encoder.py", line 179, in default
raise TypeError(f'Object of type {o.class.name__} '
TypeError: Object of type int32 is not JSON serializable

这是由于json文件不能序列化int32数据导致的，只有基本Python数据类型才能转换成JSON格式的字符串，自己创建的数据类型要转换成json的话，要先转换成Python基本数据类型。