PEP 531: simplify code expansion to match original

pep-0531.txt

@@ -113,23 +113,19 @@ with 16 or 20 lines of conditional logic really doesn't help matters.
 
 Expanding the three examples above that way hopefully helps illustrate that::
 
-    _expr1 = expr1
-    if _expr1 is not None:
-        value1 = _expr1.field.of.interest
+    if expr1 is not None:
+        value1 = expr1.field.of.interest
     else:
         value1 = None
-    _expr2 = expr2
-    if _expr2 is not None:
-        value2 = _expr2["field"]["of"]["interest"]
+    if expr2 is not None:
+        value2 = expr2["field"]["of"]["interest"]
     else:
         value2 = None
-    _expr3 = expr3
-    if _expr3 is not None:
-        value3 = _expr3
+    if expr3 is not None:
+        value3 = expr3
     else:
-        _expr4 = expr4
-        if _expr4 is not None:
-            value3 = _expr4
+        if expr4 is not None:
+            value3 = expr4
         else:
             value3 = expr5