How to install a lower version of python: First log in to the python official website, the URL is "http://www.python.org"; then click the "downloads" option to enter the download page; finally, in the download page, select Corresponding to the version of your computer, slide the mouse down to find the lower version you want, and click to download and install it.
Log in to the python official website, the URL is http://www.python.org, the home page is as follows
Click downloads, select the version that best corresponds to your computer, slide the mouse down, and find the version of python2
Click to download and install.
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