diff options
Diffstat (limited to 'Lib/sre_parse.py')
| -rw-r--r-- | Lib/sre_parse.py | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/Lib/sre_parse.py b/Lib/sre_parse.py index 4596f3b458..7313a1feca 100644 --- a/Lib/sre_parse.py +++ b/Lib/sre_parse.py @@ -81,8 +81,10 @@ class Pattern: gid = self.groups self.groups = gid + 1 if name: - if self.groupdict.has_key(name): - raise error, "can only use each group name once" + ogid = self.groupdict.get(name, None) + if ogid is not None: + raise error, ("redefinition of group name %s as group %d; " + + "was group %d") % (`name`, gid, ogid) self.groupdict[name] = gid self.open.append(gid) return gid |