From ff4c5dd80c53e4c6b1a9f2f701e74f48615b5bc5 Mon Sep 17 00:00:00 2001
From: apalala <apalala@gmail.com>
Date: Tue, 28 Nov 2023 15:40:32 -0400
Subject: [PATCH] [lint] resolve warnings

---
 tatsu/util/_common.py | 7 +++++++
 tatsu/util/parproc.py | 3 +--
 tatsu/walkers.py      | 2 ++
 3 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/tatsu/util/_common.py b/tatsu/util/_common.py
index a0edc221..91689dc1 100644
--- a/tatsu/util/_common.py
+++ b/tatsu/util/_common.py
@@ -57,6 +57,13 @@ def _pubdict(self):
         }
 
 
+def program_name():
+    import __main__ as main
+    if package := main.__package__:
+        return package
+    return Path(main.__file__).name
+
+
 def is_posix():
     return os.name == 'posix'
 
diff --git a/tatsu/util/parproc.py b/tatsu/util/parproc.py
index 3904cf88..773c4f0d 100644
--- a/tatsu/util/parproc.py
+++ b/tatsu/util/parproc.py
@@ -15,13 +15,12 @@
     TimeRemainingColumn,
 )
 
-
 from tatsu.util.unicode_characters import (
     U_CHECK_MARK,
     U_CROSSED_SWORDS,
 )
 
-from .util import identity, memory_use, program_name, try_read
+from ..util import identity, memory_use, program_name, try_read
 
 __all__ = ['parallel_proc', 'processing_loop']
 
diff --git a/tatsu/walkers.py b/tatsu/walkers.py
index e098f4a6..0406092e 100644
--- a/tatsu/walkers.py
+++ b/tatsu/walkers.py
@@ -47,6 +47,8 @@ def _walk_children(self, node: Node, *args, **kwargs):
         for child in node.children():
             return self.walk(child, *args, **kwargs)
 
+        return None
+
     def _find_walker(self, node: Node, prefix='walk_'):
         def pythonize_match(m):
             return '_' + m.group().lower()