Installation error: No package 'libffi' found pyrep

[paulpacaud]

I tried to install PyRep following the README instructions.
At the step "run pip3 install -r requirements.txt", I encountered issue:s building wheels for cffi due to:
No package 'libffi' found pyrep

I solved it by adding one command line: sudo apt-get install libffi-dev

I suggest this command to be added to the read me document, for example in the troobleshooting part.