[CI] Use Cuda 10.0 MXNet build (#991)

* Update MXNet dependency to cu100-1.6.0b20191027 for CPU and GPU

Nightly release pipelines for cu101-mkl is currently blocked.
Recent CPU builds also failed.

* Simplify Dockerfile

* Fix lint

ci/batch/docker/Dockerfile

@@ -24,5 +24,4 @@ FROM nvidia/cuda:10.1-cudnn7-devel-ubuntu18.04
  ENV PATH /opt/conda/bin:$PATH
  RUN git clone https://github.com/dmlc/gluon-nlp
  WORKDIR gluon-nlp
- RUN /bin/bash -c 'CONDA_ENVS_PATH=$PWD/conda CONDA_PKGS_DIRS=$PWD/conda/pkgs conda init bash && source /root/.bashrc && conda env update --prune -p conda/gpu/py3 -f env/gpu/py3.yml && source activate ./conda/gpu/py3 && pip install -v -e . && pip install awscli && python -m spacy download en && python -m spacy download de && python -m nltk.downloader all'
  ADD gluon_nlp_job.sh .

env/cpu/py3-master.yml

@@ -19,7 +19,7 @@ dependencies:
   - scipy=1.3.1
   - pip:
     - pylint-quotes==0.2.1
-    - mxnet-mkl>=1.6.0b20191006
+    - mxnet-cu100>=1.6.0b20191027
     - sacremoses
     - sentencepiece<0.2
     - sphinx-autodoc-typehints==1.7.0

env/docker/py3.yml

@@ -30,7 +30,7 @@ dependencies:
   - scikit-learn=0.21.3
   - pip:
     - pylint-quotes<0.2
-    - mxnet-cu101mkl>=1.6.0b20191006
+    - mxnet-cu100>=1.6.0b20191027
     - sacremoses
     - sentencepiece<0.2
     - https://github.com/szha/mx-theme/tarball/master

env/gpu/py3-master.yml

@@ -29,7 +29,7 @@ dependencies:
   - scipy=1.3.1
   - pip:
     - pylint-quotes<0.2
-    - mxnet-cu101mkl>=1.6.0b20191006
+    - mxnet-cu100>=1.6.0b20191027
     - sacremoses
     - sentencepiece<0.2
     - https://github.com/szha/mx-theme/tarball/master

scripts/parsing/parser/biaffine_parser.py

@@ -322,7 +322,7 @@ def flatten_numpy(arr):
             return arc_accuracy, rel_accuracy, overall_accuracy, outputs
         return outputs
 
-    def save_parameters(self, filename):
+    def save_parameters(self, filename):  # pylint: disable=arguments-differ
         """Save model
 
         Parameters

src/gluonnlp/model/train/cache.py

@@ -69,15 +69,19 @@ def __init__(self, lm_model, vocab_size, window, theta, lambdas, **kwargs):
         with self.name_scope():
             self.lm_model = lm_model
 
-    def save_parameters(self, filename):
+    def save_parameters(self, filename, deduplicate=False):
         """Save parameters to file.
 
         filename : str
             Path to file.
+        deduplicate : bool, default False
+            If True, save shared parameters only once. Otherwise, if a Block
+            contains multiple sub-blocks that share parameters, each of the
+            shared parameters will be separately saved for every sub-block.
         """
-        self.lm_model.save_parameters(filename)
+        self.lm_model.save_parameters(filename, deduplicate=deduplicate)
 
-    def load_parameters(self, filename, ctx=mx.cpu()): # pylint: disable=arguments-differ
+    def load_parameters(self, filename, ctx=mx.cpu()):  # pylint: disable=arguments-differ
         """Load parameters from file.
 
         filename : str