Create README.md

README.md

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+# README
+
+## Description 
+
+The second version of the PubChem324k Dataset used in the paper: [MolCA: Molecular Graph-Language Modeling with Cross-Modal Projector and Uni-Modal Adapter](https://arxiv.org/abs/2310.12798)
+
+## Load Example 
+
+```python
+import torch
+from torch_geometric.data import InMemoryDataset
+
+
+class PubChemDataset(InMemoryDataset):
+    def __init__(self, path):
+        super(PubChemDataset, self).__init__()
+        self.data, self.slices = torch.load(path)
+    
+    def __getitem__(self, idx):
+        return self.get(idx)
+
+if __name__ == '__main__':
+    dataset = PubChemDataset('./pretrain.pt')
+    print(dataset[0])
+```