更新python_升级python2.6===升级至3.6.1版本

虚拟机安装的linux 6.7版本，自带的python是2.6，如果不需要升级python版本的可以直接安装ipython

[root@adsl-172-10-0-3 ~]# python -V  ----查看python版本

[root@adsl-172-10-0-3 ~]# yum install python-pip

[root@adsl-172-10-0-3 ~]# pip install ipython

[root@adsl-172-10-0-3 ~]# pip install ipython==1.2.1 --指定版本安装ipython

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现在需要升级python版本 到3.6.1

步骤如下

[root@adsl-172-10-0-3 ~]# cd  /usr/local/src  #进下载目录

# 下载python-3.6.1

[root@adsl-172-10-0-3 src]# tar xvf Python-3.6.1.tar.xz   #解压安装包

[root@adsl-172-10-0-3 src]# cd Python-3.6.1

[root@adsl-172-10-0-3 Python-3.6.1]# ./configure --prefix=/usr/local/python3 #配置编译安装目录

[root@adsl-172-10-0-3 Python-3.6.1]# make

[root@adsl-172-10-0-3 Python-3.6.1]# make install

编译时出现报错：

zipimport.ZipImportError: can't decompress data; zlib not available

[root@adsl-172-10-0-3 src]# cd zlib-1.2.11

[root@adsl-172-10-0-3 Python-3.6.1]# ./configure      #编译

[root@adsl-172-10-0-3 Python-3.6.1]# make&& make install

[root@adsl-172-10-0-3 Python-3.6.1]# cp   /usr/local/python3/bin/python3  /usr/bin/python3

[root@adsl-172-10-0-3 Python-3.6.1]# ln -s /usr/local/python3/bin/python3 /usr/bin/python3

[root@adsl-172-10-0-3 Python-3.6.1]# python3

Python 3.6.1 (default, Jun 26 2017, 20:50:33)

[GCC 4.4.7 20120313 (Red Hat 4.4.7-18)] on linux

Type "help", "copyright", "credits" or "license" for more information.

>>>                             ####版本已升级为Python 3.6.1

安装pip3

##下载ipython包

[root@adsl-172-10-0-3 src]# tar zxvf ipython-6.0.0.tar.gz

[root@adsl-172-10-0-3 ipython-6.0.0]# python setup.py install

[root@adsl-172-10-0-3 ipython-6.0.0]# /usr/local/python3/bin/pip3 install traitlets pygments pexpect pickleshare prompt_toolkit simplegeneric  ###安装pip 包

[root@adsl-172-10-0-3 ~]# /usr/local/python3/bin/ipython3

/usr/local/python3/lib/python3.6/site-packages/IPython/core/history.py:227: UserWarning: IPython History requires SQLite, your history will not be saved

warn("IPython History requires SQLite, your history will not be saved")

Python 3.6.1 (default, Jun 26 2017, 20:50:33)

Type 'copyright', 'credits' or 'license' for more information

IPython 6.0.0 -- An enhanced Interactive Python. Type '?' for help.

In [1]:          ###已成功可以使用 ipyhon

[root@adsl-172-10-0-3 ~]# ln -s /usr/local/python3/bin/ipython3 /usr/bin/ipython3##软连接

总结：

python2.6升级到python3.6.1版本，同时配合ipython3 使用