Index: Lib/urllib.py
===================================================================
--- Lib/urllib.py	(revision 81997)
+++ Lib/urllib.py	(working copy)
@@ -661,7 +661,8 @@
         else:
             return self.http_error_default(url, fp, errcode, errmsg, headers)
 
-    def http_error_401(self, url, fp, errcode, errmsg, headers, data=None):
+    def http_error_401(self, url, fp, errcode, errmsg, headers, data=None,
+            retry=False):
         """Error 401 -- authentication required.
         This function supports Basic authentication only."""
         if not 'www-authenticate' in headers:
@@ -677,13 +678,17 @@
         if scheme.lower() != 'basic':
             URLopener.http_error_default(self, url, fp,
                                          errcode, errmsg, headers)
+        if not retry:
+            URLopener.http_error_default(self, url, fp,
+                                        errcode, errmsg, headers)
         name = 'retry_' + self.type + '_basic_auth'
         if data is None:
             return getattr(self,name)(url, realm)
         else:
             return getattr(self,name)(url, realm, data)
 
-    def http_error_407(self, url, fp, errcode, errmsg, headers, data=None):
+    def http_error_407(self, url, fp, errcode, errmsg, headers, data=None,
+            retry=False):
         """Error 407 -- proxy authentication required.
         This function supports Basic authentication only."""
         if not 'proxy-authenticate' in headers:
@@ -699,6 +704,9 @@
         if scheme.lower() != 'basic':
             URLopener.http_error_default(self, url, fp,
                                          errcode, errmsg, headers)
+        if not retry:
+            URLopener.http_error_default(self, url, fp,
+                                        errcode, errmsg, headers)
         name = 'retry_proxy_' + self.type + '_basic_auth'
         if data is None:
             return getattr(self,name)(url, realm)