title: Tensorflow: Failed to create session
body: <p>I get an error when I run my code, the error is:</p>
  
  <blockquote>
    <p>tensorflow.python.framework.errors_impl.InternalError: Failed to create session.</p>
  </blockquote>
  
  <p>Here is my code:</p>
  
  <pre><code># -*- coding: utf-8 -*-
  import ...
  import ...
  
  checkpoint='/home/vrview/tensorflow/example/char/data/model/'
  MODEL_SAVE_PATH = "/home/vrview/tensorflow/example/char/data/model/"
  
  def getAllImages(folder):
      assert os.path.exists(folder)
      assert os.path.isdir(folder)
      imageList = os.listdir(folder)
      imageList = [os.path.join(folder,item) for item in imageList ]
      num=len(imageList)
      return imageList,num
  
  def get_labei():
      img_dir, num = getAllImages(r"/home/vrview/tensorflow/example/char/data/model/file/")
      for i in range(num):
          image = Image.open(img_dir[i])
          image = image.resize([56, 56])
          image = np.array(image)
          image_array = image
  
          with tf.Graph().as_default():
              image = tf.cast(image_array, tf.float32)
              image_1 = tf.image.per_image_standardization(image)
              image_2 = tf.reshape(image_1, [1, 56, 56, 3])
  
              logit = color_inference.inference(image_2)
              y = tf.nn.softmax(logit)
              x = tf.placeholder(tf.float32, shape=[56, 56, 3])
  
              saver = tf.train.Saver()
              with tf.Session() as sess:
                ckpt = tf.train.get_checkpoint_state(MODEL_SAVE_PATH)
                if ckpt and ckpt.model_checkpoint_path:
                     global_step = ckpt.model_checkpoint_path.split('/')[-1].split('-')[-1]
                     saver.restore(sess, ckpt.model_checkpoint_path)
                     print('Loading success, global_step is %s' % global_step)
                     prediction = sess.run(y)
                     max_index = np.argmax(prediction)
                else:
                     print('No checkpoint file found')
  
          path='/home/vrview/tensorflow/example/char/data/move_file/'+str(max_index)
          isExists = os.path.exists(path)
          if not isExists :
              os.makedirs(path)
          shutil.copyfile(img_dir[i], path)
  
  def main(argv=None):
      get_labei()
  
  if __name__ == '__main__':
      tf.app.run()
  </code></pre>
  
  <p>And here is my error:</p>
  
  <pre><code>Traceback (most recent call last):
    File "/home/vrview/tensorflow/example/char/data/model/color_class_2.py", line 61, in &lt;module&gt;
      tf.app.run()
    File "/home/vrview/tensorflow/local/lib/python2.7/site-packages/tensorflow/python/platform/app.py", line 44, in run
      _sys.exit(main(_sys.argv[:1] + flags_passthrough))
    File "/home/vrview/tensorflow/example/char/data/model/color_class_2.py", line 58, in main
      get_labei()
    File "/home/vrview/tensorflow/example/char/data/model/color_class_2.py", line 40, in get_labei
      with tf.Session() as sess:
    File "/home/vrview/tensorflow/local/lib/python2.7/site-packages/tensorflow/python/client/session.py", line 1187, in __init__
      super(Session, self).__init__(target, graph, config=config)
    File "/home/vrview/tensorflow/local/lib/python2.7/site-packages/tensorflow/python/client/session.py", line 552, in __init__
      self._session = tf_session.TF_NewDeprecatedSession(opts, status)
    File "/usr/lib/python2.7/contextlib.py", line 24, in __exit__
      self.gen.next()
    File "/home/vrview/tensorflow/local/lib/python2.7/site-packages/tensorflow/python/framework/errors_impl.py", line 469, in raise_exception_on_not_ok_status
      pywrap_tensorflow.TF_GetCode(status))
  tensorflow.python.framework.errors_impl.InternalError: Failed to create session.
  </code></pre>