a problem on windows

[imomi263]

When I run the Pymic_examples , I found a problem in the function logging.basicConfig in the file train.py. This function call the function datetime.now() and use it in the filename.However ,the datetime.now() function include the char ":” which is not valid in filename on windows . I am not sure if it is the problem. https://github.com/HiLab-git/PyMIC/blob/master/pymic/net_run/train.py
line 85