Methods to lower the python version: 1. Open the anaconda prompt window; 2. Enter the "conda install python=3.6" command and press Enter; 3. Wait for the prompt (y/n), enter y, and wait for a while time, and when done is prompted, it successfully returns to python3.6.

The operating environment of this tutorial: windows7 system, python3 version, DELL G3 computer

Method to reduce the python version:

Open anaconda prompt, then enter conda install python=3.6, then wait for the prompt (y/n), enter y, wait for ten minutes, it will prompt done, in this case, it means that python3.7 has been returned It’s python3.6.

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