fix cases when expression cannot be evaluated due to type error

slurm-eff-tool.py

@@ -274,7 +274,12 @@ class SafeExpression:
     def evaluate(self, variables: Mapping[str, int | float]) -> int | float | bool:
         # normalize to downcased variable names
         variables = {k.lower(): v for k,v in variables.items()}
-        return self._eval(self.tree.body, variables)
+        try:
+            return self._eval(self.tree.body, variables)
+        except TypeError:
+            return False
+        except:
+            raise
 
     def _eval(self, node: ast.AST, variables: Mapping[str, int | float]):
         if isinstance(node, ast.Constant):