class CustomClass(QtWidgets.QWidget):
    def __init__(self):
        self._foo = QtWidgets.QLabel()
        self._foo.setToolTip("foo thing")
        self._bar = QtWidgets.QLabel()
        self._fizz = QtWidgets.QLabel()

        self._init_stuff()
        self._init_nested()

    def _init_stuff(self):
        self._bar.setToolTip("bar information")

    def _init_nested(self):
        self._something_else()

    def _something_else(self):
        self._fizz.setToolTip("asfdsadfasfd")



widget = CustomClass()
widget.setToolTip("TIP HERE")
