def keys(self):
        return self.handle.keys()
Given a list of sources files and the corresponding object files,
dataset/ETHPy150Open yinhm/datafeed/datafeed/datastore.py/Minute.keys--crossover with--dataset/ETHPy150Open adobe/brackets-shell/gyp/pylib/gyp/msvs_emulation.py/PrecompiledHeader.GetObjDependencies