parens around consts when taking attr again

uncompyle6/semantics/pysource.py

@@ -1889,6 +1889,17 @@ class SourceWalker(GenericASTTraversal, object):
 
     n_set = n_tuple = n_build_set = n_list
 
+    def n_store(self, node):
+        expr = node[0]
+        if expr == "expr" and expr[0] == "LOAD_CONST" and node[1] == "STORE_ATTR":
+            # FIXME: I didn't record which constants parenthesis is
+            # necessary. However, I suspect that we could further
+            # refine this by looking at operator precedence and
+            # eval'ing the constant value (pattr) and comparing with
+            # the type of the constant.
+            node.kind = "store_w_parens"
+        self.default(node)
+
     def n_unpack(self, node):
         if node[0].kind.startswith("UNPACK_EX"):
             # Python 3+