ImportError: No module named site

[chenchao at inhand.com.cn]

hi:
     I'm Needing to get python 2.7.10 to cross compile correctly for an 
ARM embedded device. When I execute python using shell, it comes out 
this error:ImportError: No module named site.I have setted environment 
varible:PYTHONHOME and PYTHONPATH. Is there some good idea to sovle this 
issue? who can tell me how can I download the 
python2.7.10-xcompile.patch file?thanks.
PYTHONHOME='/usr/sbin'. Python installing  dir
PYTHONPATH='/usr/lib' .The reference lib of python dir.
This is the result of executingpython -v:


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