It is self.resolver.retry_servfail, not self.retry_servfail; where were you linters?

diff --git a/dns/resolver.py b/dns/resolver.py
index 4442456c8fa6127aa158f1ad4ab82dfbf61051ec..dd702172bead8e20d02b5e3ae1b80065e94d58dd 100644 (file)
--- a/dns/resolver.py
+++ b/dns/resolver.py
@@ -659,7 +659,7 @@ class _Resolution(object):
             # rcode in it.  Remove the server from the mix if
             # the rcode isn't SERVFAIL.
             #
-            if rcode != dns.rcode.SERVFAIL or not self.retry_servfail:
+            if rcode != dns.rcode.SERVFAIL or not self.resolver.retry_servfail:
                 self.nameservers.remove(self.nameserver)
             self.errors.append((self.nameserver, self.tcp_attempt, self.port,
                                 dns.rcode.to_text(rcode), response))