ImportError: No module named os

Question

When I am executing any command which has "import os " is showing below error :

No module named os

For example :

$ sudo -iCould not find platform independent libraries <prefix>
Could not find platform dependent libraries <exec_prefix>
Consider setting $PYTHONHOME to <prefix>[:<exec_prefix>]
'import site' failed; use -v for traceback
Traceback (most recent call last):
  File "/opt/tss/bin/scbtools.py", line 30, in <module>
    import sys, os, re
ImportError: No module named os`