Linux下python3.7 的安装

Linux中已经自带了Python2.7.5，之前也安装了python3.6，但是当前代码运行需要python3.7，所以需要安装python3.7，也不能影响之前安装的其他版本的python。

1. linux自带Python2.7.5，如下：
   

[root@T-zichan-odb1-16-26 ~]# python --version
Python 2.7.5
[root@T-zichan-odb1-16-26 ~]# python
Python 2.7.5 (default, Nov  6 2016, 00:28:07) 
[GCC 4.8.5 20150623 (Red Hat 4.8.5-11)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> exit()

2.当前代码运行需要python3.7，所以需要安装python3.7

1. [root@T-zichan-odb1-16-26 ~]# whereis python
   

2. python: /usr/bin/python /usr/bin/python2.7 /usr/bin/python3.6 /usr/bin/python3.6m /usr/lib/python2.7 /usr/lib/python3.6 /usr/lib64/python2.7 /usr/lib64/python3.6 /etc/python /usr/include/python2.7 /usr/include/python3.6m /usr/share/man/man1/python.1.gz
   

3. [root@T-zichan-odb1-16-26 ~]# ls -l /usr/bin/python*
   

4. lrwxrwxrwx. 1 root root 7 4月 10 2019 /usr/bin/python -> python2
   

5. lrwxrwxrwx. 1 root root 9 4月 10 2019 /usr/bin/python2 -> python2.7
   

6. -rwxr-xr-x. 1 root root 7136 11月 6 2016 /usr/bin/python2.7
   

7. lrwxrwxrwx 1 root root 9 4月 11 2019 /usr/bin/python3 -> python3.6
   

8. lrwxrwxrwx 1 root root 18 4月 11 2019 /usr/bin/python36 -> /usr/bin/python3.6
   

9. -rwxr-xr-x 2 root root 11408 3月 29 2019 /usr/bin/python3.6
   

10. -rwxr-xr-x 2 root root 11408 3月 29 2019 /usr/bin/python3.6m
    

/usr/bin/python,/usr/bin/python2和python3都是软链接,/usr/bin/python指向/usr/bin/python2，而/usr/bin/python2最终又指向/usr/bin/python2.7

/usr/bin/python3和/usr/bin/python36都指向python3.6

3.安装python3.7

3.1下载python3.7

下载地址：

https://www.python.org/downloads/source/

下载完成后解压压缩包

tar -zxvf Python-3.7.8.tgz

3.2安装依赖包

1. yum -y install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gcc make
   

2. yum install libffi-devel
   

3.3 编译安装并创建软链接

1. cd Python-3.7.8
   

2. ./configure --prefix=/usr/bin/python3.7
   

3. make
   

4. make install
   

5. 
   

6. ln -s /usr/bin/python3.7/bin/python3.7 /usr/bin/python37
   

3.4验证

[root@T-zichan-odb1-16-26 Python-3.7.8]# python37
Python 3.7.8 (default, Jul 27 2020, 17:24:09) 
[GCC 4.8.5 20150623 (Red Hat 4.8.5-39)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> exit()

没有影响到其他版本的python

[root@T-zichan-odb1-16-26 ~]# python3
Python 3.6.6 (default, Mar 29 2019, 00:03:27) 
[GCC 4.8.5 20150623 (Red Hat 4.8.5-36)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> exit()
[root@T-zichan-odb1-16-26 ~]# python
Python 2.7.5 (default, Nov  6 2016, 00:28:07) 
[GCC 4.8.5 20150623 (Red Hat 4.8.5-11)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> exit()