I have a problem with "TESSEROCR" python library.
I am using ubuntu 16 (remote connection) , python 3.6, tesseract 4.
I have managed to install it using PIP or CPPFLAGS=-I/usr/local/include pip install tesserocr method.
However the problem is:
Once I open Python and type: import tesserocr python shuts down and I'm back into terminal. I tried to reinstall, build from source and even multiple combination of different versions. 
I have no idea where to look for.
So there are two problems which I faced while installing Tesserocr library to use System Tesserocr:

I needed to install python-dev as the TesserOCR Library has some dependences which are available only in python-dev. sudo apt install python3-dev
You need to set your locale, for which I used export LC_ALL=C.

After activating my virtualenv, I did simply pip install tesserocr and it worked like charm.
Tesserocr crashes python