在Ubuntu 16.04.6 LTS上升级python 3.5到3.7.3实录

分手后的思念是犯贱 2022-01-22 06:37 333阅读 0赞

**缘由**

我想安装一个python模块you-get，发现只能使用pip3安装，但是我发现我的Ubuntu 16.04.6 LTS上有python3.5，但是没有pip3，也无法成功安装，真是要了我的老命！网上调研一番后，发现直接从python的官网下载最新的python3.7的源码来升级python3这个思路是最可行的办法。因为python3只是一个python3.5中python3命令指向的符号链接，可以非常轻易地修改它。

可以看出，目前python官网上最新的python3版本是3.7.3.

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3Rhb182Mjc_size_16_color_FFFFFF_t_70][]

**安装依赖库**

sudo apt-get install zlib1g-dev libbz2-dev libssl-dev libncurses5-dev libsqlite3-dev libreadline-dev tk-dev libgdbm-dev libdb-dev libpcap-dev xz-utils libexpat1-dev   
sudo apt-get install liblzma-dev libffi-dev libc6-dev

从python官网下载  
https://www.python.org/downloads/release/python-373/

wget 'https://www.python.org/ftp/python/3.7.3/Python-3.7.3.tgz'

tar zxvf Python-3.7.3.tgz

cd Python-3.7.3

sudo mkdir -p /usr/local/python3

./configure --prefix=/usr/local/python3  --enable-optimizations  
make  
sudo make install

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3Rhb182Mjc_size_16_color_FFFFFF_t_70 1][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3Rhb182Mjc_size_16_color_FFFFFF_t_70 2][]

删除软链接  
先执行查看版本，如果有则证明软链接已存在，需要先删去以前的再重新建立  
sudo rm -rf /usr/bin/python3  
sudo rm -rf /usr/bin/pip3

建立新的软连接  
\#添加python3的软链接  
sudo ln -s /usr/local/python3/bin/python3.7 /usr/bin/python3  
\#添加 pip3 的软链接  
sudo ln -s /usr/local/python3/bin/pip3.7 /usr/bin/pip3

**检测版本**  
python3 -V  
pip3-V

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3Rhb182Mjc_size_16_color_FFFFFF_t_70 3][]  
查看python3的版本号

![20190605144911929.png][]

**参考文献**

\[1\].[https://segmentfault.com/a/1190000018264955?utm\_source=tag-newest][https_segmentfault.com_a_1190000018264955_utm_source_tag-newest]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3Rhb182Mjc_size_16_color_FFFFFF_t_70]: /images/20220122/c2d76412dee440b197d3f33ad71858ed.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3Rhb182Mjc_size_16_color_FFFFFF_t_70 1]: /images/20220122/24c500f00195404aaa867bd1ea790a12.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3Rhb182Mjc_size_16_color_FFFFFF_t_70 2]: /images/20220122/7f5ce61676ae4344be626a259b174a6a.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3Rhb182Mjc_size_16_color_FFFFFF_t_70 3]: /images/20220122/981db31c6ec74b2e9df0561e0edc5022.png
[20190605144911929.png]: /images/20220122/f4bc3bc10b03406aa8322f7c58f95d99.png
[https_segmentfault.com_a_1190000018264955_utm_source_tag-newest]: https://segmentfault.com/a/1190000018264955?utm_source=tag-newest