deny _ method names on modul level

src/RestrictedPython/transformer.py

@@ -396,7 +396,8 @@ def check_name(self, node, name, allow_magic_methods=False):
         if (name.startswith('_')
                 and name != '_'
                 and not (allow_magic_methods
-                         and name in ALLOWED_FUNC_NAMES)):
+                         and name in ALLOWED_FUNC_NAMES
+                         and node.col_offset != 0)):
             self.error(
                 node,
                 '"{name}" is an invalid variable name because it '

tests/transformer/test_functiondef.py

@@ -138,19 +138,6 @@ def test_RestrictingNodeTransformer__visit_FunctionDef__8(
     _getiter_.reset_mock()
 
 
-FUNC_NAMES_TEST = """
-def __init__(test):
-    test
-"""
-
-
-@pytest.mark.parametrize(*c_exec)
-def test_RestrictingNodeTransformer__module_func_def_name(c_exec):
-    """It allows to define functions with the name of allowed magic methods."""
-    result = c_exec(FUNC_NAMES_TEST)
-    assert result.errors == ()
-
-
 BLACKLISTED_FUNC_NAMES_CALL_TEST = """
 def __init__(test):
     test
@@ -161,9 +148,13 @@ def __init__(test):
 
 @pytest.mark.parametrize(*c_exec)
 def test_RestrictingNodeTransformer__module_func_def_name_call(c_exec):
-    """It forbids to use names of allowed magic methods."""
+    """It forbids definition and usage of magic methods as functions ...
+
+    ... at module level.
+    """
     result = c_exec(BLACKLISTED_FUNC_NAMES_CALL_TEST)
     # assert result.errors == ('Line 1: ')
     assert result.errors == (
+        'Line 2: "__init__" is an invalid variable name because it starts with "_"',  # NOQA: E501
         'Line 5: "__init__" is an invalid variable name because it starts with "_"',  # NOQA: E501
     )