When I try to run any PyQt5 program from Eclipse, I got this error.

Failed to load platform plugin "windows". Available platforms are: windows, minimal

I've never encountered this problem with PyQt4 but with the new version.
I'm not able to run a program. From other questions here I know it happens with Qt C++ development and the solution is to copy some Qt dll files to executable program directory.
Do I need to do the same in Python development (PyQt5) too? Add those files to the directory, where my *.py files reside? Shouldn't this be managed by PyQt5 installation?
Thank you
i had a similar problem when compiling my code with cx_freeze. 
Copying the folder platforms from python installation directory into my built folder solved the problem. the "platforms" folder contains qminimal.dll
PyQt5 - Failed to load platform plugin "windows". Available platforms are: windows, minimal