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执行demo的时候,提示这个错 #43

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@lizhi2013

D:\worksoft\anaconda3\lib\site-packages\quantdigger-0.6.0-py3.6.egg\quantdigger\engine\execute_unit.py in _load_data(self, strpcons, dt_start, dt_end, n, spec_date)
216 dt_start = spec_date[strpcon][0]
217 dt_end = spec_date[strpcon][1]
--> 218 assert(dt_start < dt_end)
219 if n:
220 wrapper = self._data_manager.get_last_bars(strpcon, n)

TypeError: '<' not supported between instances of 'int' and 'str'

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