helper method to extract single jobs

src/Parser/__init__.py

@@ -93,6 +93,8 @@ class JobShopProblem(Mapping):
     def __len__(self) -> int:
         return sum(map(len, self.problem_data))
 
+    def get_tasks_by_job(self, job):
+        return self.problem_data[job]
 
 class JobShopVisitor(arpeggio.PTNodeVisitor):
     """contains visitor functions needed for both jobshop1 (list of instances)