linux下如何查看python位数/查看centos版本

#  python  
Python 2.7.5 (default, Nov  6 2016, 00:28:07)   
[GCC 4.8.5 20150623 (Red Hat 4.8.5-11)] on linux2  
Type "help", "copyright", "credits" or "license" for more information.  
>>> import platform  
>>> platform.architecture()

cat /etc/redhat-release