def __init__(self, parent, row, processors, keymap):

            self._parent = parent
            self._row = row
            self._processors = processors
            self._keymap = keymap
Sends null signal to a process to check if it's alive
dataset/ETHPy150Open RoseOu/flasky/venv/lib/python2.7/site-packages/sqlalchemy/engine/result.py/BaseRowProxy.__init__--crossover with--dataset/ETHPy150Open YelpArchive/pushmanager/pushmanager/core/pid.py/is_process_alive