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求助,我在进行CTA回测的时候突然出现错误,显示
Traceback (most recent call last):
File "c:\vnstudio\lib\site-packages\vnpy\trader\ui\mainwindow.py", line 281, in open_widget
widget = widget_class(self.main_engine, self.event_engine)
File "c:\vnstudio\lib\site-packages\vnpy\app\cta_backtester\ui\widget.py", line 53, in init
self.load_backtesting_setting()
File "c:\vnstudio\lib\site-packages\vnpy\app\cta_backtester\ui\widget.py", line 229, in load_backtesting_setting
setting = load_json(self.setting_filename)
File "c:\vnstudio\lib\site-packages\vnpy\trader\utility.py", line 99, in load_json
data = json.load(f)
File "c:\vnstudio\lib\json__init.py", line 296, in load
parse_constant=parse_constant, object_pairs_hook=object_pairs_hook, **kw)
File "c:\vnstudio\lib\json\
init__.py", line 348, in loads
return _default_decoder.decode(s)
File "c:\vnstudio\lib\json\decoder.py", line 337, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File "c:\vnstudio\lib\json\decoder.py", line 355, in raw_decode
raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

并且我目前已经是最新版本,请问有没有朋友知道这个要如何解决么?

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请删除C:\users\administrator.vntrader里对应的json文件,再重启。如果还报同样的错,建议检查一下策略参数的类型。检查一下策略里是否有把str\bool\int\float以外的变量名,写到了parameters列表中,json文件保存不了这四种基础数据以外的类型,就会出错

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