第一天学习：python的安装及helloworld

1、linux 默认安装python，centos6.5默认python2.6，centos7默认python2.7

源码包安装：

# wget https://www.python.org/ftp/python/2.7.10/Python-2.7.10.tgz
# tar -xvf Python-2.7.10.tgz
# cd Python-2.7.10
# ./configure
# make
# make install
# python
Python 2.7.10 (default, Oct 15 2017, 05:50:03) 
[GCC 4.4.7 20120313 (Red Hat 4.4.7-17)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> 

　　

2、mac 默认安装python2.7

 

3、windows：在官网上：https://www.python.org/downloads/

下载python安装包，然后配置环境变量，

在系统环境变量中Path的值中加入 ：D:Python27;D:Python27Scripts;

验证：

D:>python
Python 2.7.10 (default, May 23 2015, 09:40:32) [MSC v.1500 32 bit (Intel)] on wi
n32
Type "help", "copyright", "credits" or "license" for more information.
>>>

　　

4、学习print：print ‘helloworld’

>>> print 'helloworld'
helloworld
>>>