Fix Issue8797 - Reset the basic auth retry count when response code is not 401.

Lib/urllib/request.py

@@ -799,7 +799,10 @@ class AbstractBasicAuthHandler:
             if mo:
                 scheme, quote, realm = mo.groups()
                 if scheme.lower() == 'basic':
-                    return self.retry_http_basic_auth(host, req, realm)
+                    response = self.retry_http_basic_auth(host, req, realm)
+                    if response and response.code != 401:
+                        self.retried = 0
+                    return response
 
     def retry_http_basic_auth(self, host, req, realm):
         user, pw = self.passwd.find_user_password(realm, host)

Misc/NEWS

@@ -132,6 +132,9 @@ Extensions
 Library
 -------
 
+- Issue #8797: urllib2 does a retry for Basic Authentication failure instead of
+  falling into recursion.
+
 - Issue #1194222: email.utils.parsedate now returns RFC2822 compliant four
   character years even if the message contains RFC822 two character years.