fail to update the data

🐛 Bug Description

I want to try to update the data but fail

To Reproduce

Steps to reproduce the behavior:

1.python scripts/dump_bin.py dump_update --csv_path ~/.qlib/csv_data/cn_data --qlib_dir ~/.qlib/qlib_data/my_data --include_fields date,open,close,high,low,volume
2.it can not work and raise an error. I trackback the error and change the code in dump_bin.py line 439
if df: -> if not df.empty
and failed again
3.I traceback next error, the filter in line 418 can not work, so i add a line in line 439
if not df.empty:
df['self.date_field_name']= df['self.date_field_name'].map(pd.Timestamp)
it raise another error again, the error is 'NaT is not in list'

Could you tell me how to update the data

Environment

pandas==1.2.0rc0
pyqlib==0.6.0.dev0