SUBMARINE-588. [SDK] Fix checkstyle error in core.py

[pingsutw]

What is this PR for?

Fix checkstyle error in submarine/ml/pytorch/model/ctr/
https://github.com/apache/submarine/runs/923503735

Run ./submarine-sdk/pysubmarine/github-actions/lint.sh
+++ dirname ./submarine-sdk/pysubmarine/github-actions/lint.sh
++ cd ./submarine-sdk/pysubmarine/github-actions
++ pwd
+ FWDIR=/home/runner/work/submarine/submarine/submarine-sdk/pysubmarine/github-actions
+ cd /home/runner/work/submarine/submarine/submarine-sdk/pysubmarine/github-actions
+ cd ..
+ pycodestyle --max-line-length=100 -- submarine tests
+ pylint --ignore experiment '--msg-template={path} ({line},{column}): [{msg_id} {symbol}] {msg}' --rcfile=pylintrc -- submarine tests
************* Module submarine.ml.pytorch.model.ctr.afm
submarine/ml/pytorch/model/ctr/afm.py (30,0): [W0223 abstract-method] Method '_forward_unimplemented' is abstract in class 'Module' but is not overridden
submarine/ml/pytorch/model/ctr/afm.py (57,0): [W0223 abstract-method] Method '_forward_unimplemented' is abstract in class 'Module' but is not overridden
submarine/ml/pytorch/model/ctr/afm.py (81,0): [W0223 abstract-method] Method '_forward_unimplemented' is abstract in class 'Module' but is not overridden
************* Module submarine.ml.pytorch.model.ctr.deepfm
submarine/ml/pytorch/model/ctr/deepfm.py (32,0): [W0223 abstract-method] Method '_forward_unimplemented' is abstract in class 'Module' but is not overridden
************* Module submarine.ml.pytorch.layers.core
submarine/ml/pytorch/layers/core.py (20,0): [W0223 abstract-method] Method '_forward_unimplemented' is abstract in class 'Module' but is not overridden
submarine/ml/pytorch/layers/core.py (42,0): [W0223 abstract-method] Method '_forward_unimplemented' is abstract in class 'Module' but is not overridden
submarine/ml/pytorch/layers/core.py (57,0): [W0223 abstract-method] Method '_forward_unimplemented' is abstract in class 'Module' but is not overridden
submarine/ml/pytorch/layers/core.py (72,0): [W0223 abstract-method] Method '_forward_unimplemented' is abstract in class 'Module' but is not overridden

What type of PR is it?

[Hot Fix]

Todos

• - Task

What is the Jira issue?

https://issues.apache.org/jira/browse/SUBMARINE-588

How should this be tested?

https://travis-ci.org/github/pingsutw/hadoop-submarine/builds/712952549

Screenshots (if appropriate)

Questions:

• Does the licenses files need update? No
• Is there breaking changes for older versions? No
• Does this needs documentation? No

[xunliu]

LGTM