1 files changed, 19 insertions, 0 deletions
diff --git a/Lib/lib2to3/fixes/fix_funcattrs.py b/Lib/lib2to3/fixes/fix_funcattrs.py
new file mode 100644
index 0000000..a9ba125
--- /dev/null
+++ b/Lib/lib2to3/fixes/fix_funcattrs.py
@@ -0,0 +1,19 @@
+"""Fix function attribute names (f.func_x -> f.__x__)."""
+# Author: Collin Winter
+
+# Local imports
+from . import basefix
+from .util import Name
+
+
+class FixFuncattrs(basefix.BaseFix):
+    PATTERN = """
+    power< any+ trailer< '.' attr=('func_closure' | 'func_doc' | 'func_globals'
+                                  | 'func_name' | 'func_defaults' | 'func_code'
+                                  | 'func_dict') > any* >
+    """
+
+    def transform(self, node, results):
+        attr = results["attr"][0]
+        attr.replace(Name(("__%s__" % attr.value[5:]),
+                          prefix=attr.get_prefix()))