python - Error importing hashlib -

i have problem similar one:

error importing hashlib python 2.7 not 2.6

however, need different solution because on embedded system , can't use pip or apt-get install everything. need know is: specific files missing , how can hashlib import correctly?

to clarify, errors same in original post. core issue appears built-in _hashlib module seems missing, there's no _hashlib.so i'm not sure find it.