From 58fbb6fcca476db0d06b7a8638fb2d869137115b Mon Sep 17 00:00:00 2001
From: "Rebecca N. Palmer" <rebecca_palmer@zoho.com>
Date: Fri, 22 Sep 2023 11:28:36 +0100
Subject: [PATCH] sanitization: reduce unnecessary rejections

---
 numexpr/necompiler.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/numexpr/necompiler.py b/numexpr/necompiler.py
index 0414ed0..8a14123 100644
--- a/numexpr/necompiler.py
+++ b/numexpr/necompiler.py
@@ -264,8 +264,8 @@ def __str__(self):
 
 
 _flow_pat = r'[\;\[\:]'
-_dunder_pat = r'__[\w]+__'
-_attr_pat = r'\.\b(?!(real|imag|[eE]?[+-]?\d+)\b)'
+_dunder_pat = r'(^|[^\w])__[\w]+__($|[^\w])'
+_attr_pat = r'\.\b(?!(real|imag|\d*[eE]?[+-]?\d+)\b)'
 _blacklist_re = re.compile(f'{_flow_pat}|{_dunder_pat}|{_attr_pat}')
 
 def stringToExpression(s, types, context, sanitize: bool=True):