* implement pin_memory/unpin_memory/is_pinned for dgl.graph
* update python docstring
* update c++ docstring
* add test
* fix the broken UnifiedTensor
* eliminate extra context parameter for pin/unpin
* fix linting
* fix typo
* disable new format materialization for pinned graphs
* update python doc for pin_memory_
* fix unit test
* update doc
* change unitgraph and heterograph's PinMemory to in-place
* update comments for NDArray's PinMemory_ and PinData
* update doc
Co-authored-by: Jinjing Zhou <VoVAllen@users.noreply.github.com>
* [Feature] Add dgl.reorder() to re-order graph according to specified strategy
* fix unit test failure for metis reorder
* fix unit test failure on mxnet_cpu
* refine unit test for dgl.reorder
* fix unit test failure on mxnet
* fix array_equal error for mxnet unit test
* fix unit test failure for mxnet
* convert metis output to numpy array explicitly
Co-authored-by: Tong He <hetong007@gmail.com>
* new tutorials for small graphs
* address changes and use GraphDataLoader
* fix and add data
* fix load_data
* style fixes
* Update 5_graph_classification.py