move parsed cache to outside of class

danthedeckie · Apr 6, 2021 · ea98d06 · ea98d06
1 parent dfbdc6b
commit ea98d06
Showing 1 changed file with 3 additions and 4 deletions.
diff --git a/simpleeval.py b/simpleeval.py
@@ -261,6 +261,7 @@ def safe_add(a, b):  # pylint: disable=invalid-name
 
 ATTR_INDEX_FALLBACK = True
 
+PARSED_EXPRESSION_CACHE = {}
 
 ########################################
 # And the actual evaluator:
@@ -291,8 +292,6 @@ def __init__(self, operators=None, functions=None, names=None, enable_cache=Fals
         self.names = names
 
         self.enable_cache = enable_cache
-        if enable_cache:
-            self.parsed_expression_cache = {}
 
         self.nodes = {
             ast.Expr: self._eval_expr,
@@ -352,11 +351,11 @@ def eval(self, expr):
             return self._eval(ast.parse(expr.strip()).body[0])
 
         stripped_expr = expr.strip()
-        parsed_expr = self.parsed_expression_cache.get(stripped_expr)
+        parsed_expr = PARSED_EXPRESSION_CACHE.get(stripped_expr)
         if parsed_expr:
             return self._eval(parsed_expr)
         parsed_expr = ast.parse(stripped_expr).body[0]
-        self.parsed_expression_cache[stripped_expr] = parsed_expr
+        PARSED_EXPRESSION_CACHE[stripped_expr] = parsed_expr
         return self._eval(parsed_expr)
 
     def _eval(self, node):