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Co-authored-by: Ubuntu <ubuntu@ip-172-31-28-63.ap-northeast-1.compute.internal>

* update

* update

* update

* lint

* update

* CI

* lint

* update doc

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Co-authored-by: Ubuntu <ubuntu@ip-172-31-36-188.ap-northeast-1.compute.internal>

* Update dgl.data.rst

* Add files via upload

* Add files via upload

* Add files via upload

* Update zinc.py

* Update dgl.data.rst

* Update test_data.py

* Add files via upload

* Update cluster.py

* Update pattern.py

* Update zinc.py

* Update zinc.py

* Update test_data.py

* lint

* fix

* fix path

* update test on label shape

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Co-authored-by: rudongyu <ru_dongyu@outlook.com>

* new functional for creating data splits in graph

* minor fix in data split implementation

* apply suggestions from code review
Co-authored-by: Mufei Li <mufeili1996@gmail.com>

* refactoring + unit tests

* fix test file name

* move imports to the top

* Revert "fix test file name"

This reverts commit 126323e38c8de6fdc73c826dccc9048aed8f9634.

* remove nccl submodule

* address linter issues

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Co-authored-by: Mufei Li <mufeili1996@gmail.com>
Co-authored-by: Hongzhi (Steve), Chen <chenhongzhi.nkcs@gmail.com>

* add PATTERN dataset

* fix bug

* fix bugs

* fix issues

* refine according to dongyu's comments

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Co-authored-by: BuptTab <gyzhou2000@gmail.com>
Co-authored-by: rudongyu <ru_dongyu@outlook.com>

* add CLUSTER dataset

* refine according to dongyu's comments

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Co-authored-by: rudongyu <ru_dongyu@outlook.com>

* [Misc] Auto-format tests.

* more

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Co-authored-by: Ubuntu <ubuntu@ip-172-31-28-63.ap-northeast-1.compute.internal>

Co-authored-by: Ubuntu <ubuntu@ip-172-31-28-63.ap-northeast-1.compute.internal>