install PyQt5 in Python 2.7 at high Sierra

1. download & install SIP
    https://www.riverbankcomputing.com/software/sip/download
    https://gist.github.com/kilfu0701/47b74a17a70b43549985
 or
 $ brew upgrade sip

2. Upgrade QT
 $ brew upgrade qt

3. download PyQt5
   https://www.riverbankcomputing.com/software/pyqt/download5
 
  check the path of the modules
 $ python configure.py -d /usr/local/lib/python2.7/site-packages/ --qmake=/usr/local/Cellar/qt/5.9.1/bin/qmake --sip=/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/bin/sip --sip-incdir=../sip-4.19.3/siplib

 $ make
 $ sudo make install

20170-10-22 Updated

if PyCharm has no reference to PyQt, check the preferences, find the python package folder structure and change the directory(-d /Library/Python/2.7/site-packages)