def keys(self):
        return self.__items.keys()
do the pre calculations in order to get TET, speed, TTG
dataset/ETHPy150Open rene-aguirre/pywinusb/pywinusb/hid/core.py/HidReport.keys--crossover with--dataset/ETHPy150Open cimatosa/jobmanager/jobmanager/progress.py/Progress._calc