move helper functions in core.py to helpers.py

pydra/engine/core.py

@@ -26,6 +26,9 @@
     attr_fields,
 )
 from .helpers import (
+    is_task,
+    is_workflow,
+    is_lazy,
     make_klass,
     create_checksum,
     print_help,
@@ -68,7 +71,6 @@ class TaskBase:
     input_spec : : TODO
         XXXX
 
-
     cache_dir : :obj:`os.pathlike` or None
         Path to directory to store cache.  Save new cache here if prior cache couldn't be
         found here or in `cache_locations`.
@@ -305,7 +307,6 @@ def checksum_states(self, state_index=None):
         ----------
         state_index :
             TODO
-
         """
         self.state.prepare_states(self.inputs)
         self.state.prepare_inputs()
@@ -1067,21 +1068,3 @@ def _collect_outputs(self):
                 else:
                     raise ValueError(f"Task {val.name} raised an error")
         return attr.evolve(output, **output_wf)
-
-
-def is_task(obj):
-    """Check whether an object looks like a task."""
-    return hasattr(obj, "_run_task")
-
-
-def is_workflow(obj):
-    """Check whether an object is a :class:`Workflow` instance."""
-    return isinstance(obj, Workflow)
-
-
-def is_lazy(obj):
-    """Check whether an object has any field that is a Lazy Field"""
-    for f in attr_fields(obj):
-        if isinstance(getattr(obj, f.name), LazyField):
-            return True
-    return False

pydra/engine/helpers.py

@@ -19,6 +19,24 @@
 from .helpers_file import hash_file, hash_dir, copyfile, is_existing_file
 
 
+def is_task(obj):
+    """Check whether an object looks like a task."""
+    return hasattr(obj, "_run_task")
+
+
+def is_workflow(obj):
+    """Check whether an object is a :class:`Workflow` instance."""
+    return isinstance(obj, Workflow)
+
+
+def is_lazy(obj):
+    """Check whether an object has any field that is a Lazy Field"""
+    for f in attr_fields(obj):
+        if isinstance(getattr(obj, f.name), LazyField):
+            return True
+    return False
+
+
 def ensure_list(obj, tuple2list=False):
     """
     Return a list whatever the input object is.