issue for pip install cryptography

when issue in 

Command "/home/andy/P_ENV1/env/bin/python3 -u -c "import setuptools, 

tokenize;__file__='/tmp/pip-build-kicuvik8/cryptography/setup.py';

exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 

'exec'))" install --record /tmp/pip-vebd4vda-record/install-record.txt 

--single-version-externally-managed --compile --install-headers 

/home/andy/P_ENV1/env/include/site/python3.5/cryptography" failed with error code 1 in 

/tmp/pip-build-kicuvik8/cryptography/

actually 

I am really the things going 

 solution ======**********************===========

sudo apt-get install build-essential libssl-dev libffi-dev python-dev