通过Fluid实现机器翻译模型报错

• 问题描述：通过Fluid实现机器翻译模型报错

• 报错输出：

TTraceback (most recent call last):
  File "train.py", line 173, in <module>
    train()
  File "train.py", line 108, in train
    feeder = fluid.DataFeeder()
TypeError: __init__() missing 2 required positional arguments: 'feed_list' and 'place'

• 解决方法：

DataFeeder()方法需要相关的参数，将相关参数传入则可。

place  = core.CPUPlace()
exe = Executor(place)
exe.run(framework.default_startup_program())

feed_list = [
    main_program.global_block().var(var_name) for var_name in feed_order
]
feeder = fluid.DataFeeder(feed_list, place)