About: Python not recognizing command even after installed Python 3.7.3

Dear Team I have already installed python 3.7.3 64-bit in my window 8.1. I started learning Django using python. But after few days 4-5 days I found python not recognizing command. Could you please advise me. Is there any possibilities of Antivirous update and running for removing virous . Than

About: from sklearn import linear_model ModuleNotFoundError: No module named sklearn

Dear Team Please attached Python_PyCharm Interpreter doc and zoom it . The screen shots are explanatory. Could you please guide me step wise to resolve the Issue. I am completely new to Python. Thanks Regards Jai Prakash 7975839735 -- https://mail.python.org/mailman/listinfo/python-list