I\'ve got Python 3.3.2 installed (both x86 and x64 versions) and PyQt5.1 installed on top of them.
Recently I installed PyCharm 3.0 Community Edition and configured to w
Couldn't install in pip either but building from source worked fine for me. As mentioned on the comment the .exe file doesn't come with documentation and i think pycharm wouldn't like that because qt its c++. Download here.
if you dont want to build from source then check where did the exe file install qt5. Probably the install went fine but the dir installed is not in the path.
pip install https://github.com/pyinstaller/pyinstaller/tarball/develop