Show return value when not None...

And fixup setup.py

setup.py

@@ -1,6 +1,65 @@
 #!/usr/bin/env python
 """Setup script for the 'uncompyle6' distribution."""
+import sys
 
-from setuptools import setup
+import setuptools
 
-setup(packages=["uncompyle6"])
+SYS_VERSION = sys.version_info[0:2]
+if not ((3, 6) <= SYS_VERSION < (3, 11)):
+    mess = "Python Release 3.6 .. 3.10 are supported in this code branch."
+    if (2, 4) <= SYS_VERSION <= (2, 7):
+        mess += (
+            "\nFor your Python, version %s, use the python-2.4 code/branch."
+            % sys.version[0:3]
+        )
+    elif SYS_VERSION >= (3, 10):
+        mess += (
+            "\nFor your Python, version %s, use the master code/branch."
+            % sys.version[0:3]
+        )
+    elif (3, 0) >= SYS_VERSION < (3, 3):
+        mess += (
+            "\nFor your Python, version %s, use the python-3.0-to-3.2 code/branch."
+            % sys.version[0:3]
+        )
+    elif SYS_VERSION < (2, 4):
+        mess += (
+            "\nThis package is not supported for Python version %s." % sys.version[0:3]
+        )
+    print(mess)
+    raise Exception(mess)
+
+from __pkginfo__ import (
+    __version__,
+    author,
+    author_email,
+    classifiers,
+    entry_points,
+    install_requires,
+    license,
+    long_description,
+    modname,
+    py_modules,
+    short_desc,
+    web,
+    zip_safe,
+)
+
+setuptools.setup(
+    author=author,
+    author_email=author_email,
+    classifiers=classifiers,
+    description=short_desc,
+    entry_points=entry_points,
+    install_requires=install_requires,
+    license=license,
+    long_description=long_description,
+    long_description_content_type="text/x-rst",
+    name=modname,
+    packages=setuptools.find_packages(),
+    py_modules=py_modules,
+    test_suite="nose.collector",
+    url=web,
+    version=__version__,
+    zip_safe=zip_safe,
+)

uncompyle6/semantics/pysource.py

@@ -1212,6 +1212,7 @@ class SourceWalker(GenericASTTraversal, NonterminalActions, ComprehensionMixin):
         is_lambda=False,
         noneInNames=False,
         is_top_level_module=False,
+        compile_mode="exec"
     ) -> GenericASTTraversal:
         # FIXME: DRY with fragments.py
 
@@ -1262,7 +1263,6 @@ class SourceWalker(GenericASTTraversal, NonterminalActions, ComprehensionMixin):
                         load_const.kind == "LOAD_CONST"
                         and load_const.linestart is None
                         and load_const.attr is None
-                        or is_top_level_module
                     ):
                         # Delete LOAD_CONST (None) RETURN_VALUE
                         del tokens[-2:]
@@ -1371,6 +1371,7 @@ def code_deparse(
         co,
         is_lambda=is_lambda_mode(compile_mode),
         is_top_level_module=is_top_level_module,
+        compile_mode=compile_mode,
     )
 
     # XXX workaround for profiling