1.安装python3
1.1下载python源码包
网址：https://www.python.org/downloads/release/python-362/
下载地址：https://www.python.org/ftp/python/3.6.2/Python-3.6.2.tgz
1.1.1安装python前的库环境，非常重要
代码语言：javascript复制yum install gcc patch libffi-devel python-devel zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel -y1.2下载，解压安装源码包
代码语言：javascript复制 1、./configure 是用来检测你的安装平台的目标特征的。比如它会检测你是不是有CC或GCC，并不是需要CC或GCC，它是个shell脚本。
2、make 是用来编译的，它从Makefile中读取指令，然后编译。
3、make install是用来安装的，它也从Makefile中读取指令，安装到指定的位置。wget https://www.python.org/ftp/python/3.4.7/Python-3.4.7.tar.xz
xz -d Python-3.4.7.tar.xz
tar -xf Python-3.4.7.tar
#yum install gcc -y
./configure --prefix=/opt/python
make && make install
---------------------
用python查看默认安装路径
>>> import sys
>>> sys.path
['', '/usr/local/lib/python36.zip', '/usr/local/lib/python3.6',
'/usr/local/lib/python3.6/lib-dynload', '/usr/local/lib/python3.6/site-packages']
--------------------
python3.4默认没添加path
在/etc/profile最后一行添加
export PATH=$PATH:/opt/python/bin
然后
source /etc/profile
#python快捷path就被改了，yum用的python2，麻烦1.2.3 牛逼的python Tab自动补全
下载setuptool 3.4以上已经默认安装了easy_install-3.4
代码语言：javascript复制下载地址：
https://pypi.python.org/pypi/setuptools/36.2.7
下载命令：
wget https://pypi.python.org/packages/07/a0/11d3d76df54b9701c0f7bf23ea9b00c61c5e14eb7962bb29aed866a5844e/setuptools-36.2.7.zip#md5=b9e6c049617bac0f9e908a41ab4a29ac
解压：
unzip setuptools-36.2.7.zip
编译:
python3 setup.py build
python2 setup.py build
无误后安装：
python3 setup.py install
python2 setup.py install下载readline
代码语言：javascript复制#yum install -y readline-devel -y
#pip install readlinetab补全
#python startup file
import readline,rlcompleter
#tab completion
readline.parse_and_bind('tab:complete')
----------------------------
python历史记录
#history file
import os
history_file = os.path.join(os.environ["HOME"],".pythonhistory") [root@mm_local ~]# echo "export PYTHONSTARTUP='/root/.pythonstartup'" >> /root/.bashrc
[root@mm_local ~]# source /root/.bashrc
[root@mm_local ~]# cat /root/.pythonstartup
import os
import readline
import rlcompleter
import atexit
#tab completion
readline.parse_and_bind("tab: complete")
#history file
history_file = os.path.join(os.environ["HOME"],".pythonhistory")
try:
readline.read_history_file(history_file)
except IOError:
pass
atexit.register(readline.write_history_file,history_file)
del os,history_file,readline,rlcompleter
[root@mm_local ~]# python
Python 2.7.3 (default, Jun 5 2013, 22:40:26)
[GCC 4.4.6 20110731 (Red Hat 4.4.6-3)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.path<tab> #按tab键就可以自动补全了
[root@mm_local ~]# python
>>>
>>> sys.path #按上下方向键即可找到历史命令 
