mirror of https://gitee.com/XmacsLabs/planet.git
96 lines
2.0 KiB
Tcl
96 lines
2.0 KiB
Tcl
<TeXmacs|2.1.3>
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<style|<tuple|generic|chinese>>
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<\body>
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<doc-data|<doc-title|如何在Debian中切换默认Python版本>>
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首先查看当前系统中默认的Python版本：
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<\session|shell|default>
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<\output>
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Shell session inside TeXmacs pid = 1042144
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</output>
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<\unfolded-io|Shell] >
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python --version
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<|unfolded-io>
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Python 3.7.7
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</unfolded-io>
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<\input|Shell] >
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\;
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</input>
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</session>
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然后查看当前系统可用的Python有哪些：
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<\session|shell|default>
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<\unfolded-io|Shell] >
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ls /usr/bin/python[0-9].*[0-9]
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<|unfolded-io>
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/usr/bin/python3.10 \ /usr/bin/python3.7 \ /usr/bin/python3.8
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\ /usr/bin/python3.9
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</unfolded-io>
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<\input|Shell] >
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\;
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</input>
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</session>
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我们可以把以上的python版本都放入python命令的候补列表：
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<\shell-code>
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sudo update-alternatives --install /usr/bin/python python
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/usr/bin/python3.8 2
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sudo update-alternatives --install /usr/bin/python python
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/usr/bin/python3.9 3
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sudo update-alternatives --install /usr/bin/python python
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/usr/bin/python3.10 4
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</shell-code>
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现在我们可以列出这个候补列表
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<\session|shell|default>
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<\unfolded-io|Shell] >
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update-alternatives --list python
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<|unfolded-io>
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/usr/bin/python3.10
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/usr/bin/python3.7
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/usr/bin/python3.8
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/usr/bin/python3.9
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</unfolded-io>
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<\unfolded-io|Shell] >
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python --version
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<|unfolded-io>
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Python 3.10.5
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</unfolded-io>
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<\input|Shell] >
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\;
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</input>
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</session>
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现在默认的Python版本已经切换到Python
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3.10.5，说明上面最后的数字越大，优先级越高。
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我们也可以使用
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<\shell-code>
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<code|update-alternatives --config python>
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</shell-code>
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在终端中以交互模式选择我们的默认Python版本。
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</body>
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<\initial>
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<\collection>
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<associate|page-medium|paper>
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</collection>
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</initial> |