Me sale el siguiente error cuando ejecutopython cifar10.py:

argparse.ArgumentError: argument --batch_size: conflicting option string(s): --batch_size

Aquí está el resultado completo de la ejecución, incluida una traza completa:

I tensorflow/stream_executor/dso_loader.cc:101] successfully opened CUDA library libcublas.so.7.0 locally                          
I tensorflow/stream_executor/dso_loader.cc:101] successfully opened CUDA library libcudnn.so.6.5 locally                           
I tensorflow/stream_executor/dso_loader.cc:101] successfully opened CUDA library libcufft.so.7.0 locally                           
I tensorflow/stream_executor/dso_loader.cc:101] successfully opened CUDA library libcuda.so locally                                
I tensorflow/stream_executor/dso_loader.cc:101] successfully opened CUDA library libcurand.so.7.0 locally                          
Traceback (most recent call last):                                                                                                 
  File "cifar10.py", line 54, in <module>                                                                                          
    """Number of images to process in a batch.""")                                                                                 
  File "/usr/local/lib/python2.7/dist-packages/tensorflow/python/platform/default/_flags.py", line 86, in DEFINE_integer           
    _define_helper(flag_name, default_value, docstring, int)                                                                       
  File "/usr/local/lib/python2.7/dist-packages/tensorflow/python/platform/default/_flags.py", line 60, in _define_helper           
    type=flagtype)                                                                                                                 
  File "/usr/lib/python2.7/argparse.py", line 1297, in add_argument                                                                
    return self._add_action(action)                                                                                                
  File "/usr/lib/python2.7/argparse.py", line 1671, in _add_action                                                                 
    self._optionals._add_action(action)                                                                                            
  File "/usr/lib/python2.7/argparse.py", line 1498, in _add_action                                                                 
    action = super(_ArgumentGroup, self)._add_action(action)                                                                       
  File "/usr/lib/python2.7/argparse.py", line 1311, in _add_action                                                                 
    self._check_conflict(action)                                                                                                   
  File "/usr/lib/python2.7/argparse.py", line 1449, in _check_conflict                                                             
    conflict_handler(action, confl_optionals)                                                                                      
  File "/usr/lib/python2.7/argparse.py", line 1456, in _handle_conflict_error                                                      
    raise ArgumentError(action, message % conflict_string)                                                                         
argparse.ArgumentError: argument --batch_size: conflicting option string(s): --batch_size 

Este error parece provenir de la siguiente línea encifar10.py: tf.app.flags.DEFINE_integer('batch_size', 128, """Number of images to process in a batch.""")

Parece que elargparse la biblioteca cree que ya he definido la cadena de opción--batch_sizePero no lo he hecho.

[Pila: instancia de punto de Amazon g2.2xlarge, Python 2.7.6]