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How to install python3?
1. First run the cmd command line window and execute python -V to check whether python has been installed on this machine. The following figure proves that it is not installed
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##2. First go to the official website to download, python is cross-platform, we need the version we need, and then click to download
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3. After the download is completed, double-click to execute To install, select Custom Installation in the pop-up window and check Add path below
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4. Check the options you need and click Next
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5. Select the location where you need to install the python software, and then click the install button to install
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6. After the installation is completed Just click to close, and then check the currently installed version to prove that it has been installed successfully and can be used normally
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