[ENH] Enable debugging in converters (#1186)

* update adni to bids

* update aibl to bids

* update oasis to bids

clinica/iotools/converters/adni_to_bids/adni_utils.py

@@ -1296,13 +1296,16 @@ def paths_to_bids(
 
     bids_dir = Path(bids_dir)
     images_list = list([data for _, data in images.iterrows()])
+    create_file_ = partial(
+        create_file,
+        modality=modality,
+        bids_dir=bids_dir,
+        mod_to_update=mod_to_update,
+    )
+    # If n_procs==1 do not rely on a Process Pool to enable classical debugging
+    if n_procs == 1:
+        return [create_file_(image) for image in images_list]
     with Pool(processes=n_procs) as pool:
-        create_file_ = partial(
-            create_file,
-            modality=modality,
-            bids_dir=bids_dir,
-            mod_to_update=mod_to_update,
-        )
         output_file_treated = pool.map(create_file_, images_list)
 
     return output_file_treated

clinica/iotools/converters/aibl_to_bids/utils/bids.py

@@ -150,14 +150,16 @@ def paths_to_bids(
     )
 
     images_list = list([data for _, data in images.iterrows()])
-
+    create_file_ = partial(
+        _create_file,
+        modality=modality,
+        bids_dir=bids_dir,
+        overwrite=overwrite,
+    )
+    # If n_procs==1 do not rely on a Process Pool to enable classical debugging
+    if n_procs == 1:
+        return [create_file_(image) for image in images_list]
     with Pool(processes=n_procs) as pool:
-        create_file_ = partial(
-            _create_file,
-            modality=modality,
-            bids_dir=bids_dir,
-            overwrite=overwrite,
-        )
         output_file_treated = pool.map(create_file_, images_list)
 
     return output_file_treated

clinica/iotools/converters/oasis_to_bids/oasis_to_bids.py

@@ -202,7 +202,11 @@ def convert_images(self, source_dir, dest_dir, n_procs: Optional[int] = 1):
             for path in Path(source_dir).rglob("OAS1_*")
             if path.is_dir() and path.name.endswith("_MR1")
         ]
-
-        with Pool(processes=n_procs) as pool:
-            func = partial(self.convert_single_subject, dest_dir=dest_dir)
-            pool.map(func, subjs_folders)
+        func = partial(self.convert_single_subject, dest_dir=dest_dir)
+        # If n_procs==1 do not rely on a Process Pool to enable classical debugging
+        if n_procs == 1:
+            for folder in subjs_folders:
+                func(folder)
+        else:
+            with Pool(processes=n_procs) as pool:
+                pool.map(func, subjs_folders)