Implement Dataset, Dataloader and DataModule class and fix SupervisedSolver

pina/data/unsupervised_dataset.py

@@ -0,0 +1,13 @@
+"""
+Unsupervised dataset module
+"""
+from .base_dataset import BaseDataset
+
+
+class UnsupervisedDataset(BaseDataset):
+    """
+    This class extend BaseDataset class to handle unsupervised dataset,
+    composed of input points and, optionally, conditional variables
+    """
+    data_type = 'unsupervised'
+    __slots__ = ['input_points', 'conditional_variables']