From 0a5bd51dd30762e3e3b0f3b00ffe7899b9c58317 Mon Sep 17 00:00:00 2001
From: Berker Peksag <berker.peksag@gmail.com>
Date: Fri, 29 Apr 2016 19:50:02 +0300
Subject: [PATCH] Issue #13436: Add a test to make sure that
 ast.ImportFrom(level=None) works

---
 Lib/test/test_ast.py | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/Lib/test/test_ast.py b/Lib/test/test_ast.py
index a025c20006c..7b43be6dfc2 100644
--- a/Lib/test/test_ast.py
+++ b/Lib/test/test_ast.py
@@ -548,6 +548,17 @@ class ASTHelpers_Test(unittest.TestCase):
             compile(mod, 'test', 'exec')
         self.assertIn("invalid integer value: None", str(cm.exception))
 
+    def test_level_as_none(self):
+        body = [ast.ImportFrom(module='time',
+                               names=[ast.alias(name='sleep')],
+                               level=None,
+                               lineno=0, col_offset=0)]
+        mod = ast.Module(body)
+        code = compile(mod, 'test', 'exec')
+        ns = {}
+        exec(code, ns)
+        self.assertIn('sleep', ns)
+
 
 class ASTValidatorTests(unittest.TestCase):