PINN variants addition and Solvers Update (#263)

* gpinn/basepinn new classes, pinn restructure
* codacy fix gpinn/basepinn/pinn
* inverse problem fix
* Causal PINN (#267)
* fix GPU training in inverse problem (#283)
* Create a `compute_residual` attribute for `PINNInterface`
* Modify dataloading in solvers (#286)
* Modify PINNInterface by removing _loss_phys, _loss_data
* Adding in PINNInterface a variable to track the current condition during training
* Modify GPINN,PINN,CausalPINN to match changes in PINNInterface
* Competitive Pinn Addition (#288)
* fixing after rebase/ fix loss
* fixing final issues

---------

Co-authored-by: Dario Coscia <dariocoscia@Dario-Coscia.local>

* Modify min max formulation to max min for paper consistency
* Adding SAPINN solver (#291)
* rom solver
* fix import

---------

Co-authored-by: Dario Coscia <dariocoscia@Dario-Coscia.local>
Co-authored-by: Anna Ivagnes <75523024+annaivagnes@users.noreply.github.com>
Co-authored-by: valc89 <103250118+valc89@users.noreply.github.com>
Co-authored-by: Monthly Tag bot <mtbot@noreply.github.com>
Co-authored-by: Nicola Demo <demo.nicola@gmail.com>

pina/solvers/garom.py

@@ -253,18 +253,11 @@ class GAROM(SolverInterface):
         :rtype: LabelTensor
         """
 
-        dataloader = self.trainer.train_dataloader
         condition_idx = batch["condition"]
 
         for condition_id in range(condition_idx.min(), condition_idx.max() + 1):
 
-            if sys.version_info >= (3, 8):
-                condition_name = dataloader.condition_names[condition_id]
-            else:
-                condition_name = dataloader.loaders.condition_names[
-                    condition_id
-                ]
-
+            condition_name = self._dataloader.condition_names[condition_id]
             condition = self.problem.conditions[condition_name]
             pts = batch["pts"].detach()
             out = batch["output"]