How to setup the default version on Ubuntu

high_java

• Check your python version
  ~$ pythonPython 3.2 (r32:88445, Mar 25 2011, 19:28:28) [GCC 4.5.2] on linux2Type "help", "copyright", "credits" or "license" for more information.
  
• Mine is 3.2, what if I want to switch to default version 2.7
  which python/usr/bin/python
  
•  Here is the command
  sudo mv /usr/bin/python /usr/bin/python32sudo ln -s /usr/bin/python2.7 /usr/bin/python