Remove the '#' symbol in the header comment

Remove the '#' symbol in the header comment

example/gluon/lstm_crf/lstm_crf.py

@@ -14,7 +14,9 @@
 # KIND, either express or implied.  See the License for the
 # specific language governing permissions and limitations
 # under the License.
-
+"""This example demonstrates how the LSTM-CRF model can be implemented
+in Gluon to perform noun-phrase chunking as a sequence labeling task.
+"""
 import mxnet as mx
 from mxnet import autograd as ag, ndarray as nd, gluon
 from mxnet.gluon import Block, nn, rnn
@@ -26,23 +28,28 @@
 
 mx.random.seed(1)
 
+
 # Helper functions to make the code more readable.
 def to_scalar(x):
     return int(x.asscalar())
 
+
 def argmax(vec):
     # return the argmax as a python int
     idx = nd.argmax(vec, axis=1)
     return to_scalar(idx)
 
+
 def prepare_sequence(seq, word2idx):
     return nd.array([word2idx[w] for w in seq])
 
+
 # Compute log sum exp is numerically more stable than multiplying probabilities
 def log_sum_exp(vec):
     max_score = nd.max(vec).asscalar()
     return nd.log(nd.sum(nd.exp(vec - max_score))) + max_score
 
+
 # Model
 class BiLSTM_CRF(Block):
     def __init__(self, vocab_size, tag2idx, embedding_dim, hidden_dim):
@@ -174,6 +181,7 @@ def forward(self, sentence):  # dont confuse this with _forward_alg above.
         score, tag_seq = self._viterbi_decode(lstm_feats)
         return score, tag_seq
 
+
 # Run training
 START_TAG = "<START>"
 STOP_TAG = "<STOP>"