with open(text_filename,‘w‘) as myfile TypeError: a bytes-like object is required, not ‘str‘

使用语句：

with open(text_filename,'wb') as myfile:
    json.dump({'weights': \weights.tolist()}, myfile)

报错：

TypeError: a bytes-like object is required, not 'str'

我修改'wb'为‘w'

with open(text_filename,'w') as myfile:
    json.dump({'weights': \weights.tolist()}, myfile)

成功运行。