python源码安装(实现多个版本的python共存)

矫情吗；* 2023-01-03 05:58 223阅读 0赞

### 操作系统 ###

Ubuntu 16.04  
默认python 3的版本是3.5

### 源码安装 ###

#### 下载python3.9 ####

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#### 安装 ####

(1)解压文件

tar -xvf Python-3.9.1.tar.xz

tar命令使用可以通过tar --help 来查看。  
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(2)进入解压后的文件夹

cd  Python-3.9.1

(3)配置 配置文件

./configure --prefix=/usr/local/python3 --with-ssl

查看configure文件可以知道参数的作用:

Installation directories:
      --prefix=PREFIX         install architecture-independent files in PREFIX
                              [$ac_default_prefix]
      --exec-prefix=EPREFIX   install architecture-dependent files in EPREFIX
                              [PREFIX]
       . . . 
      --with-ssl-default-suites=[python|openssl|STRING]
                              override default cipher suites string, python: use
                              Python's preferred selection (default), openssl:
                              leave OpenSSL's defaults untouched, STRING: use a
                              custom string, PROTOCOL_SSLv2 ignores the setting,
                              see Doc/library/ssl.rst

(4)编译 `make`  
(5)安装 `sudo make install`  
(6)添加python3符号链结和pip3符号连接

sudo ln -s /usr/local/python3/bin/python3 /usr/bin/python3

sudo ln -s /usr/local/python3/bin/pip3 /usr/bin/pip3

(7)查看效果

pip3 -V

结果是:

pip 20.2.3 from /usr/local/python3/lib/python3.9/site-packages/pip (python 3.9)

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