A typical structure of a PyQt applications is as follows,
APP -- src (main.py, ...)
|- ui (mainwindow.py, *.ui, ...)
|- rc (*.qrc, icons, images, ...)
Note:
PyCharm 4.5 support python 3 and PyQt 5
.qrc files have to managed by hand as xml files. Otherwise they can be generated by Qt Creator. They are compiled in the folowing way
pyrcc5 app.qrc -o app_rc.py
*.ui files can be generated by Qt Designer and be compiled by pyuic5 and then Ui_*.py can be imported and called by other python code
pyuic5 logindialog.ui -o ui_logindialog.py
For PySide applications, above tools are pyside-uic and pyside-rcc, respectively.
A very good tutorial about PyQt is here
BTW, to keep a Desktop link of Pycharm, and call its shortcut by Win key,
I suggest install Pycharm with sudo account