请问以下问题如何解决，vnpy 1.9.2版本
File "C:\vnpy-1.9.2-LTS\examples\CtaBacktesting\runBacktesting.py", line 16, in <module>
from vnpy.trader.app.ctaStrategy.ctaBacktesting import BacktestingEngine, MINUTE_DB_NAME
File "C:\vnpy-1.9.2-LTS\vnpy\trader\app\ctaStrategy\ctaBacktesting.py", line 17, in <module>
import numpy as np
File "C:\ProgramData\Anaconda2\Lib\site-packages\numpy__init__.py", line 140, in <module>
from . import _distributor_init
ImportError: cannot import name _distributor_init
