Extend check_serializability type convertion.

src/dbispipeline/utils.py

@@ -344,7 +344,8 @@ def write_slurm_job_file(dryrun, force, verbose, restore, mail, plan):
     content = '#!/bin/bash -l\n'
     content += '\n'.join(['#SBATCH ' + x for x in options])
 
-    venv_manager = config.get('slurm', 'virtual_env_manager',
+    venv_manager = config.get('slurm',
+                              'virtual_env_manager',
                               fallback='pipenv')
     content += f'\nsrun {venv_manager} run python -m dbispipeline {plan} '
 
@@ -443,6 +444,14 @@ def check_serializability(content,
             cleaned = pos_inf_replacement
         elif type(content) == float and np.isneginf(content):
             cleaned = neg_inf_repacement
+        elif type(content) == np.ndarray:
+            cleaned = content.tolist()
         else:
-            cleaned = content
+            try:
+                # assume numpy type
+                cleaned = content.item()
+            except AttributeError as ex:
+                raise ValueError(
+                    f'Type \'{type(content)}\' is no numpy type.') from ex
+
         return cleaned