centos7安装python3.5
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python官网地址:
https://www.python.org/downloads/release/python-354/
解压移动到/usr/lcoal下
tar -zxf Python-3.5.4.tgzmv Python-3.5.4 /usr/local/
安装依赖
yum install openssl-devel bzip2-devel expat-devel gdbm-devel readline-devel sqlite-devel
查看旧的python
[root@localhost opt]# ll /usr/bin | grep pythonlrwxrwxrwx. 1 root root 7 7月 19 03:17 python -> python2lrwxrwxrwx. 1 root root 9 7月 19 03:17 python2 -> python2.7-rwxr-xr-x. 1 root root 7136 11月 6 2016 python2.7
只删掉旧的python软连接,只删除此软连接的好处是可以保留python2.7,让2与3并存,而且yum也依赖python2
rm -rf/usr/bin/python
开始编译安装python
cd /usr/local/Python-3.5.4/./configuremake && make install
报错 未安装合适的编译器
configure: error: in `/usr/local/Python-3.5.4':configure: error: no acceptable C compiler found in $PATHSee `config.log' for more details
解决方案
yum install gcc-c++
报错
[root@localhost Python-3.5.4]# yum install gcc-c++-bash: /usr/bin/yum: /usr/bin/python: 坏的解释器: 没有那个文件或目录[root@localhost Python-3.5.4]# cd /usr/bin/
由于上面的步骤删除了python依赖,而yum安装要此依赖,而且python升级完有一个问题是,yum还是需要python2.7,正好趁现在直接修改下配置,解决方案
vim /usr/bin/yum
#!/usr/bin/python 换成 #!/usr/bin/python2.7
vim /usr/libexec/urlgrabber-ext-down
#! /usr/bin/python2换成#! /usr/bin/python2.7
重新执行yum install gcc-c++
成功
再次尝试编译安装
cd /usr/local/Python-3.5.4/./configuremake && make install
成功~~~
cd /usr/binln -s /usr/local/bin/python3 python
最终效果
[root@localhost bin]# pythonPython 3.5.4 (default, Nov 25 2017, 00:17:01) [GCC 4.8.5 20150623 (Red Hat 4.8.5-16)] on linuxType "help", "copyright", "credits" or "license" for more information.>>> exit()[root@localhost bin]# python2Python 2.7.5 (default, Nov 6 2016, 00:28:07) [GCC 4.8.5 20150623 (Red Hat 4.8.5-11)] on linux2Type "help", "copyright", "credits" or "license" for more information.>>> exit()
接下来安装一些必要的库
pip3 install numpy pip3 install mkl pip3 install atlas ......
ok
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