在整理好股票数据以后，通过数据管理器导入csv文件导入文件。
出现如下错误：
Traceback (most recent call last):
File "C:\Users\tonyq\Python\PycharmProjects\vnpy-master\venv\lib\site-packages\vnpy_datamanager\ui\widget.py", line 226, in import_data
start, end, count = self.engine.import_data_from_csv(
File "C:\Users\tonyq\Python\PycharmProjects\vnpy-master\venv\lib\site-packages\vnpy_datamanager\engine.py", line 59, in import_data_from_csv
dt: datetime = datetime.strptime(item[datetime_head], datetime_format)
File "C:\Users\tonyq\AppData\Local\Programs\Python\Python310\lib_strptime.py", line 568, in _strptime_datetime
tt, fraction, gmtoff_fraction = _strptime(data_string, format)
File "C:\Users\tonyq\AppData\Local\Programs\Python\Python310\lib_strptime.py", line 349, in _strptime
raise ValueError("time data %r does not match format %r" %
ValueError: time data '2018/10/29' does not match format '%Y-%m-%d'
仔细检查了日期的格式，没有问题，可是为什么这里还是报日期格式的问题呢
