Update expression.py

Author: BobTheBuidler

mypyc/irbuild/expression.py

@@ -1029,12 +1029,8 @@ def constant_fold_expr_or_tuple(
             return value
         if not isinstance(expr, TupleExpr):
             return None
-        folded = tuple(
-            const
-            for const in map(partial(constant_fold_expr_or_tuple, builder), expr.items)
-            if const is not None
-        )
-        return folded if len(folded) == len(expr.items) else None
+        folded = tuple(map(partial(constant_fold_expr_or_tuple, builder), expr.items))
+        return folded if None not in folded else None
 
     result = {}
     for key_expr, value_expr in items: