1 files changed, 7 insertions, 7 deletions
diff --git a/BaseTools/Source/Python/Common/RangeExpression.py b/BaseTools/Source/Python/Common/RangeExpression.py
index 00c0c5e94d..7f504d6e31 100644
--- a/BaseTools/Source/Python/Common/RangeExpression.py
+++ b/BaseTools/Source/Python/Common/RangeExpression.py
@@ -416,9 +416,9 @@ class RangeExpression(BaseExpression):
 
     # Template function to parse binary operators which have same precedence
     # Expr [Operator Expr]*
-    def _ExprFuncTemplate(self, EvalFunc, OpLst):
+    def _ExprFuncTemplate(self, EvalFunc, OpSet):
         Val = EvalFunc()
-        while self._IsOperator(OpLst):
+        while self._IsOperator(OpSet):
             Op = self._Token
             try:
                 Val = self.Eval(Op, Val, EvalFunc())
@@ -429,18 +429,18 @@ class RangeExpression(BaseExpression):
 
     # A [|| B]*
     def _OrExpr(self):
-        return self._ExprFuncTemplate(self._AndExpr, ["OR", "or"])
+        return self._ExprFuncTemplate(self._AndExpr, {"OR", "or"})
 
     # A [&& B]*
     def _AndExpr(self):
-        return self._ExprFuncTemplate(self._NeExpr, ["AND", "and"])
+        return self._ExprFuncTemplate(self._NeExpr, {"AND", "and"})
 
     def _NeExpr(self):
         Val = self._RelExpr()
-        while self._IsOperator([ "!=", "NOT", "not"]):
+        while self._IsOperator({"!=", "NOT", "not"}):
             Op = self._Token
             if Op in ["!", "NOT", "not"]:
-                if not self._IsOperator(["IN", "in"]):
+                if not self._IsOperator({"IN", "in"}):
                     raise BadExpression(ERR_REL_NOT_IN)
                 Op += ' ' + self._Token
             try:
@@ -452,7 +452,7 @@ class RangeExpression(BaseExpression):
 
     # [!]*A
     def _RelExpr(self):
-        if self._IsOperator(["NOT" , "LE", "GE", "LT", "GT", "EQ", "XOR"]):
+        if self._IsOperator({"NOT" , "LE", "GE", "LT", "GT", "EQ", "XOR"}):
             Token = self._Token
             Val = self._NeExpr()
             try: