diff --git a/openpype/hosts/hiero/api/lib.py b/openpype/hosts/hiero/api/lib.py
index f1985a2e12..29484a2141 100644
--- a/openpype/hosts/hiero/api/lib.py
+++ b/openpype/hosts/hiero/api/lib.py
@@ -37,10 +37,11 @@ self.default_bin_name = "openpypeBin"
 AVALON_CONFIG = os.getenv("AVALON_CONFIG", "pype")
 
 
-def flatten(input_list):
-    for item in input_list:
+def flatten(_list):
+    for item in _list:
         if isinstance(item, (list, tuple)):
-            yield from flatten(item)
+            for sub_item in flatten(item):
+                yield sub_item
         else:
             yield item
 
diff --git a/openpype/hosts/hiero/api/otio/hiero_export.py b/openpype/hosts/hiero/api/otio/hiero_export.py
index 50a00a1624..abf510403e 100644
--- a/openpype/hosts/hiero/api/otio/hiero_export.py
+++ b/openpype/hosts/hiero/api/otio/hiero_export.py
@@ -28,12 +28,13 @@ self.timeline = None
 self.include_tags = True
 
 
-def flatten(l):
-        for i in l:
-            if isinstance(i, (list, tuple)):
-                yield from flatten(i)
-            else:
-                yield i
+def flatten(_list):
+    for item in _list:
+        if isinstance(item, (list, tuple)):
+            for sub_item in flatten(item):
+                yield sub_item
+        else:
+            yield item
 
 
 def get_current_hiero_project(remove_untitled=False):
diff --git a/openpype/hosts/hiero/api/workio.py b/openpype/hosts/hiero/api/workio.py
index 15ffbf84d8..dacb11624f 100644
--- a/openpype/hosts/hiero/api/workio.py
+++ b/openpype/hosts/hiero/api/workio.py
@@ -65,13 +65,9 @@ def open_file(filepath):
 
 def current_file():
     current_file = hiero.core.projects()[-1].path()
-    normalised = os.path.normpath(current_file)
-
-    # Unsaved current file
-    if normalised == "":
+    if not current_file:
         return None
-
-    return normalised
+    return os.path.normpath(current_file)
 
 
 def work_root(session):