fix: fix 'assignment-from-none' for pylint

.pylintrc

@@ -4,6 +4,7 @@
 disable=all
 enable=anomalous-backslash-in-string,
         assignment-from-no-return,
+        assignment-from-none,
         bare-except,
         broad-exception-caught,
         dangerous-default-value,

src/wuttjamaican/batch.py

@@ -468,11 +468,11 @@ class BatchHandler(GenericHandler):
         if batch.executed:
             raise ValueError(f"batch has already been executed: {batch}")
 
-        reason = self.why_not_execute(batch, user=user, **kwargs)
+        reason = self.why_not_execute(batch, user=user, **kwargs) # pylint: disable=assignment-from-none
         if reason:
             raise RuntimeError(f"batch execution not allowed: {reason}")
 
-        result = self.execute(batch, user=user, progress=progress, **kwargs)
+        result = self.execute(batch, user=user, progress=progress, **kwargs) # pylint: disable=assignment-from-none
         batch.executed = datetime.datetime.now()
         batch.executed_by = user
         return result