def allow_new_attr(self, allow = True):
        object.__setattr__(self, '_allownew', allow)
Read ``num_bytes`` from the running process' stdout stream.
dataset/ETHPy150Open ipython/ipython-py3k/IPython/utils/ipstruct.py/Struct.allow_new_attr--crossover with--dataset/ETHPy150Open pyinvoke/invoke/invoke/runners.py/Runner.read_stdout