Python series (vi) deploying multiple Python versions in centos7.x

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CentOS7 installing Python3 and virtualenv via Pyenv

CentOS The version of Python that is installed by default is version 2.7.5. We will step through the installation of Python3.6.1 on the CentOS server.

Since many of the tools in the CentOS system are dependent on the Python2.7.5 of the system, it is necessary to use PYENV for environmental isolation in order not to affect the use of Python2.7.5. Virtualenv is used to create a separate Python environment for each Python app.

The following begins the formal installation:

1 ) Update System

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2 ) Installation dependent environment

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3 ) Install pyenv

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4 ) Configure environment Variables

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5 The following results have been successfully installed

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6 ) Install Python3

Description: You can use pyenv install-l to view supported versions of the installation

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Installing 3.6.1

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7 ) version switching

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8 ) View Python version

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9 ) Install virtualenv

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Ten ) Create a virtual environment

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One ) to start the virtual environment

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A ) exit the virtual environment

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If you want multiple versions, install a few more versions. Then you can switch back and forth.

For example you do: pyenv install 2.7.13 installation 2.7. After the 13 version is complete, you can switch back and forth, as I have shown below:

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Python series (vi) deploying multiple Python versions in centos7.x