Check versions, inside anaconda 3 powershell prompt (administrator)
1) >>python --version # to check python version #current 3.6.6
2) >> python # to get ito python
>>> import cv2
>>> cv2.__version__ #current (4.2.0) , control_lD to quit python
3) >> conda list anaconda #check tools under anaconda, current results as below
# Name Version Build Channel
_anaconda_depends 2019.03 py37_0
anaconda custom py37_1
anaconda-client 1.7.2 py37_0
anaconda-navigator 1.9.7 py37_0
anaconda-project 0.8.4 py_0