一.windows下安装python
1》windows上python后缀是.msi的，下载下来后，直接双击运行。会在c盘生成python.exe的文件，把python.exe的文件加入到windows环境变量中：我的电脑---属性---高级---环境变量--编辑--添加“c:\python27”--确定 C:\Python27 C:\Python27\Scripts
下载地址：https://www.python.org/ftp/python/2.7.13/python-2.7.13.msi
2》在windows下安装完python后，进入cmd，输入python，也会进入python命令行
3》windows验证python及退出
4》windows 退出python exit()
二.linux 下安装python
1》yum源安装
安装pip命令，用pip安装ipython（pip install python）
[root@localhost ~]# cd soft/
[root@localhost soft]# ls
epel-release-6-8.noarch.rpm
[root@localhost soft]# rpm -ivh epel-release-6-8.noarch.rpm
warning: epel-release-6-8.noarch.rpm: Header V3 RSA/SHA256 Signature, key ID 0608b895: NOKEY
Preparing... ########################################### [100%]
1:epel-release ########################################### [100%]
[root@localhost soft]# cd /etc/yum.repos.d/
[root@localhost yum.repos.d]# ls //yum目录下生成epel epel-testing.repo
a bak CentOS-Base.repo epel.repo epel-testing.repo
[root@localhost yum.repos.d]# yum -y install python-pip
[root@localhost yum.repos.d]# pip install ipython //安装ipython，会通过ipython的官网，下载当前最新的版本进行安装，注意，linux中python的版本是2.6，当前最新的iptyon的版本是6.0，网站上说明使用于python3，所以，安装后报错
[root@localhost yum.repos.d]# pip install ipython==1.2.1 //指定ipython的版本进行安装，
。。。。。。
Installing collected packages: ipython
Running setup.py install for ipython
Successfully installed ipython-1.2.1
。。。。。。。。。。
[root@localhost yum.repos.d]# pip list //查看
You are using pip version 7.1.0, however version 9.0.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
distribute (0.6.10)
iniparse (0.3.1)
ipython (1.2.1)
pip (7.1.0)
pycurl (7.19.0)
Pygments (2.2.0)
pygpgme (0.1)
pyxdg (0.18)
setuptools (0.6rc11)
six (1.10.0)
urlgrabber (3.9.1)
yum-metadata-parser (1.1.2)
[root@localhost yum.repos.d]# ipython //输入ipython命令就会进入python下，具有补全功能
Python 2.6.6 (r266:84292, Nov 22 2013, 12:16:22)
Type "copyright", "credits" or "license" for more information.
IPython 1.2.1 -- An enhanced Interactive Python.
? -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help -> Python's own help system.
object? -> Details about 'object', use 'object??' for extra details.
In [1]:
2》源码安装ipython
[root@www soft]# ls
51CTO下载-ipython-1.2.1.tar.gz
[root@www soft]# tar xf 51CTO下载-ipython-1.2.1.tar.gz
[root@www soft]# ls
51CTO下载-ipython-1.2.1.tar.gz redis-3.2.8.tar.gz
ipython-1.2.1 zabbix-2.0.12.tar.gz
mongodb-linux-x86_64-rhel62-3.2.7.tgz
[root@www soft]# cd ipython-1.2.1/
[root@www ipython-1.2.1]# ls
COPYING.txt examples PKG-INFO scripts setupegg.py setup.py
docs IPython README.rst setupbase.py setupext
[root@www ipython-1.2.1]# python setup.py install //python执行setup脚本，就可以用ipython补全了
三.配置不同操作系统的环境变量
1》配置windows 系统环境变量
win10 操作系统环境变量在一下路径进行添加可执行程序：
我的电脑---属性---高级---环境变量--编辑--添加
2》linux系统环境变量配置
例如要添加php命令，php安装在 /usr/local/webserver/php 下。永久有效添加php命令：
[root@localhost ~]# vim /etc/profile //在文件末尾添加如下两行内容
.........................
........................
#php
export PATH=/usr/local/webserver/php/bin:$PATH
[root@localhost ~]# source /etc/profile //是环境变量生效
四.python 从 "hello world"开始
#/usr/bin/python
#coding=utf-8
#@Time :2017/10/16 8:59
#@Auther :liuzhenchuan
#@File :python 从 hello world 开始.py
a = 'hell world'
print a
name = raw_input('please input you name: ')
print 'hell world %s' % name
>>> hell world
###############################################
please input you name: liuzhenchuan
hell world liuzhenchuan