simulate_v1 dataset could traine

# Please enter the commit message for your changes. Lines starting
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# On branch refine_dataset_format
# Changes to be committed:
#	new file:   generate_simulate_dataset.py
#	new file:   test.py
#	modified:   tg_dataset.py
#	modified:   utils_dataset.py
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# Changes not staged for commit:
#	modified:   ../../../benchmarks/xgraph/Readme.md
#	modified:   ../../../benchmarks/xgraph/config/config.yaml
#	deleted:    ../../../benchmarks/xgraph/config/datasets/simulate_v2.yaml
#	modified:   ../../../benchmarks/xgraph/config/datasets/wikipedia.yaml
#	modified:   ../../../benchmarks/xgraph/config/explainers/attn_explainer_tg.yaml
#	modified:   ../../../benchmarks/xgraph/config/explainers/pbone_explainer_tg.yaml
#	modified:   ../../../benchmarks/xgraph/config/explainers/pg_explainer_tg.yaml
#	modified:   ../../../benchmarks/xgraph/config/explainers/subgraphx_tg.yaml
#	modified:   ../../../benchmarks/xgraph/config/models/tgat.yaml
#	modified:   ../../../benchmarks/xgraph/subgraphx_tg_run.py
#	modified:   ../../../benchmarks/xgraph/utils.py
#	modified:   ../evaluation/metrics_tg.py
#	modified:   ../method/attn_explainer_tg.py
#	modified:   ../method/other_baselines_tg.py
#	modified:   ../method/subgraphx_tg.py
#	modified:   ../method/tg_score.py
#	modified:   ../models/ext/tgat/graph.py
#	modified:   ../models/ext/tgat/learn_edge.py
#	modified:   ../models/ext/tgat/learn_simulate.py
#	modified:   ../models/ext/tgat/module.py
#	modified:   ../models/ext/tgat/process.py
#	modified:   ../models/ext/tgat/train.sh
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# Untracked files:
#	../../../benchmarks/xgraph/config/datasets/reddit.yaml
#	../../../benchmarks/xgraph/config/datasets/simulate_v1.yaml
#	../../../benchmarks/xgraph/config/models/tgn.yaml
#	../../../benchmarks/xgraph/cppgckpt.sh
#	../../../benchmarks/xgraph/run.sh
#	../../../benchmarks/xgraph/test.py
#	../evaluation/metrics_tg_utils.py
#	../method/base_explainer_tg.py
#	../models/ext/tgat/cpckpt.sh
#	../models/ext/tgn/
#	../../../examples/xgraph/
#
