Created by: Termset

在impala基础上的改动，运行出现如下错误。运行其他算法没有问题。

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C++ Call Stacks (More useful to developers):
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0   std::string paddle::platform::GetTraceBackString<std::string const&>(std::string const&, char const*, int)
1   paddle::platform::EnforceNotMet::EnforceNotMet(std::string const&, char const*, int)
2   paddle::operators::ReadOp::RunImpl(paddle::framework::Scope const&, paddle::platform::Place const&) const
3   paddle::framework::OperatorBase::Run(paddle::framework::Scope const&, paddle::platform::Place const&)
4   paddle::framework::Executor::RunPreparedContext(paddle::framework::ExecutorPrepareContext*, paddle::framework::Scope*, bool, bool, bool)
5   paddle::framework::Executor::Run(paddle::framework::ProgramDesc const&, paddle::framework::Scope*, int, bool, bool, std::vector<std::string, std::allocator<std::string> > const&, bool)

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Python Call Stacks (More useful to users):
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  File "/home/xtq/anaconda3/lib/python3.6/site-packages/paddle/fluid/framework.py", line 2488, in append_op
    attrs=kwargs.get("attrs", None))
  File "/home/xtq/anaconda3/lib/python3.6/site-packages/paddle/fluid/layer_helper.py", line 43, in append_op
    return self.main_program.current_block().append_op(*args, **kwargs)
  File "/home/xtq/anaconda3/lib/python3.6/site-packages/paddle/fluid/layers/io.py", line 872, in read_file
    type='read', inputs={'Reader': [reader]}, outputs={'Out': out})
  File "/home/xtq/DVTrace v2.3.1/atari_agent.py", line 74, in build_program
    self.learn_reader)
  File "/home/xtq/anaconda3/lib/python3.6/site-packages/parl/core/fluid/agent.py", line 87, in __init__
    self.build_program()
  File "/home/xtq/DVTrace v2.3.1/atari_agent.py", line 29, in __init__
    super(AtariAgent, self).__init__(algorithm)
  File "train.py", line 65, in __init__
    self.learn_data_provider)
  File "train.py", line 276, in <module>
    learner = Learner(config)

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Error Message Summary:
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Error: Paddle internal Check failed. (Please help us create a new issue, here we need to find the developer to add a user friendly error message)
  [Hint: Expected ins.size() == out_arg_names.size(), but received ins.size():9 != out_arg_names.size():8.] at (/paddle/paddle/fluid/operators/reader/read_op.cc:92)
  [operator < read > error]